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? semiconductor components industries, llc, 2013 january, 2013 ? rev. 0 1 publication order number: NCV7462/d NCV7462 lin/can sbc/system-ic the NCV7462 is a monolithic lin/can system ? basic ? chip with enhanced feature set useful in automotive body control systems. besides the bus interfaces the ic features two 5 v voltage regulators, high ? side and low ? side switches to control led?s and relays, and supervision functionality like a window watchdog. this allows a highly integrated solution by replacing external discrete components while maintaining the system flexibility. as a consequence, the board space and ecu weight can be minimized. features ? main supply functional operating range from 5 v to 28 v ? main supply parametrical operating range 6 v to 18 v ? can high speed transceiver compliant to iso11898 ? txd time ? out on can ? lin physical layer according to lin 2.1 and saej2602 ? programmable txd time ? out on lin ? power management through operating modes: normal, standby, sleep and flash ? low drop voltage regulator vr1: 5 v / 250 ma, 2% output tolerance ? reverse current protected low drop voltage regulator vr2: 5 v / 50 ma, 2% output tolerance ? 3x wake ? up inputs, e.g. for contact monitoring ? wake ? up logic with cyclic contact monitoring ? wake ? up source recognition ? independent pwm functionality for all outputs (integrated pwm registers) ? window watchdog with programmable times ? 2x low ? side driver (typ. 3 ) with over ? load protection and active clamp; e.g. for relays ? 1x high ? side driver (typ. 1 ) with over ? and under ? load detection and auto ? recovery; e.g. for bulbs, led?s and switches ? 1x high ? side driver (selectable between typ. 2 and 7 ) with over ? and under ? load detection; e.g. for led?s and switches ? 3x high ? side driver (typ. 7 ) with over ? and under ? load detection; e.g. for led?s and switches ? 2x operational amplifier for current sensing ? 24 ? bit spi interface ? protection against short circuit, over ? voltage and over ? temperature ? ssop36 ? ep package ? this is a pb ? free device typical applications like ? de ? centralized door electronic systems ? body control units (bcus) ? climate control systems http://onsemi.com ssop36 ? ep dq suffix case 940ab marking diagram xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx awlyywwg xxxx = specific device code a = assembly location wl = wafer lot yy = year ww = work week g = pb ? free package see detailed ordering and shipping information on page 54 of this data sheet. ordering information
NCV7462 http://onsemi.com 2 block diagram ncv 7462 logic protection short circuit open load overtemperature under/over voltage low ? side low ? side high ? side high ? side high ? side high ? side high ? side op1 op1+ op1 ? op1out op2 op2+ op2 ? op2out ls1 ls2 out_hs out1 out2 out3/fso out4 wu1 wu2 wu3 vr1 5v/250ma vr2 5v/50ma spi lin can vr1 vr2 watchdog csn sclk sdi sdo nres txdl/flash rxdl/intn txdc/flash rxdc vcc_can gnd2 gnd1 canh vsplit canl lin inh vs inh switch local wakeup detector figure 1. block diagram table of contents block diagram 2 ..................................... pin-out 3 ........................................... pin description 3 ..................................... application circuit 5 .................................. maximum ratings 6 .................................. recommended operating conditions 7 ................... thermal data 7 ...................................... electrical characteristics 9 ............................. functional description 27 .............................. spi control 40 .......................................
NCV7462 http://onsemi.com 3 pin ? out NCV7462 powersoic ? 36 136 18 19 out2 out3/fso out1 ls2 out_hs ls1 inh out4 vs lin gnd2 op1 ? csn op1out wu2 wu1 wu3 op1+ gnd1 figure 2. package pin ? out rxdc txdc/flash canh canl vsplit vcc_can nres vr1 vr2 txdl/flash rxdl/intn op2+ op2 ? op2out sdi sdo sclk table 1. pin description pin # pin name description comment 1 gnd1 ground ground connection 2 rxdc digital push ? pull output receiver output of the can transceiver 3 txdc/flash digital input with pull ? up transmitter data input of the can transceiver / flash mode entry 4 canh can bus interface high ? level can bus line (high during dominant) 5 canl can bus interface low ? level can bus line (low during dominant) 6 vsplit hv output can common ? mode stabilization pin 7 vcc_can supply input supply for the can transceiver 8 nres digital open ? drain output with internal pull ? up resistor reset signal to the mcu 9 vr1 5v regulator output 2%, 250 ma 10 vr2 5v regulator output 2%, 50 ma, protected against short to vs 11 txdl/flash digital input with pull ? up transmitter data input of the lin transceiver / flash mode entry 12 rxdl/intn digital push ? pull output receiver output of the lin transceiver / interrupt output 13 op2+ analog input opamp input 14 op2 ? analog input opamp input 15 op2out hv analog output opamp output 16 sdi digital input with pull ? down spi data input 17 sdo digital push ? pull output, tristate spi data output 18 sclk digital input with pull ? down spi clock input 19 csn digital input with pull ? up spi chip select input 20 wu1 hv input voltage ? sense input (threshold typ. vs/2), switched pull ? up/down 21 wu2 hv input voltage ? sense input (threshold typ. vs/2), switched pull ? up/down
NCV7462 http://onsemi.com 4 table 1. pin description pin # comment description pin name 22 wu3 hv input voltage ? sense input (threshold typ. vs/2), switched pull ? up/down 23 op1out hv analog output opamp output 24 op1 ? analog input opamp input 25 op1+ analog input opamp input 26 out4 hs driver resistive loads, ron 7 typ, ilim > 140 ma 27 out3/fso hs driver resistive loads, ron 7 typ, ilim > 140 ma / fso output 28 out2 hs driver resistive loads, ron 7 typ, ilim > 140 ma 29 out1 hs driver resistive loads, ron 2 /7 typ, ilim > 250 ma/140 ma (two configura- tions) 30 out_hs hs driver resistive loads, ron 1 typ, ilim > 1000 ma 31 vs battery supply input principle power ? supply of the device 32 inh hs output battery related output to switch off the lin master resisor or to control an external voltage regulator 33 lin lin bus interface lin bus pin, low in dominant state 34 ls1 ls driver relay driver, ron 2 typ, ilim > 250 ma, active clamp to ground 35 ls2 ls driver relay driver, ron 2 typ, ilim > 250 ma, active clamp to ground 36 gnd2 ground/test pin ground connection in the application / test pin in the production
NCV7462 http://onsemi.com 5 application circuit kl30 mcu e.g. sensor relay m vbat to op2 to mcu adc r5w switches can bus lin bus NCV7462 logic low ? side low ? side high ? side high ? side high ? side high ? side high ? side op1 op1+ op1 ? op1out op2 op2+ op2 ? op2out ls1 ls2 out hs _ out1 out2 out3/fsc out4 wu1 wu2 wu3 vr1 5v/250ma vr2 5v/50ma spi lin can vr1 vr2 watchdog csn sclk sdi sdo nres txdl/flash rxdl/intn txdc/flash rxdc vcc can gnd2 gnd1 canh vsplit canl lin inh vs inh switch local wakeup detector figure 3. application diagram protection short circuit open load overtemperature under/over voltage
NCV7462 http://onsemi.com 6 table 2. absolute maximum ratings symbol parameter min max unit vmax_vs power supply voltage ? 0.3 40 v vmax_wu1 ? 3 wake pins dc and transient voltage ? 0.3 vs + 0.3 v vmax_opout1/2 opamp analog output voltage range ? 0.3 vs + 0.3 v vmax_out1 ? 4 vmax_out_hs high ? side output voltage range ? 0.3 vs + 0.3 v vmax_ls1/2 ls1/2 pin voltage range dc ls1/2 pin transient voltage range (during flyback) ? 0.3 ? 0.3 40 65 v v vmax_lin dc voltage on lin pin ? 20 40 v vmax_inh dc voltage on inh pin ? 0.3 vs + 0.3 v vmax_canh/l vmax_vsplit dc voltage on pin canh, canl and vsplit ? 40 40 v vmax_vr1 stabilized supply voltage, logic supply ? 0.3 min (5.5, vs + 0.3) v vmax_vr2 stabilized supply voltage ? 0.3 28 v vmax_vcc_can supply input for the can transceiver ? 0.3 5.5 v vmax_digio dc voltage at digital pins (rxdc, nres, rxdl/intn, sdi, sdo, sclk, csn) ? 0.3 vr1 + 0.3 v vmax_op1/2(+/ ? ) opamp input voltage range ? 0.3 vs + 0.3 v vmax_txdl(c)/fl ash dc voltage at txdl/flash and txdc/flash inputs ? 0.3 28 v imax_input current injection into vs related input pins 5 ma esd human body model (100pf, 1500 ) all pins ? 2 +2 kv pins lin, canh/l, vsplit and wu1 ? 3 to gnd ? 4 +4 pins out_hs, out1 ? 4, ls1/2 to gnd ? 4 +4 esd following iec 61000 ? 4 ? 2 (150 pf, 330 ) valid for pins vs, lin, canh/l, vsplit, wux ? vs pin with reverse ? protection and filtering capacitor ? vsplit pin stressed through split can termination ? wux pins stressed through a serial resistor >10 k ? out_hs, out1 ? 4 pins with parallel capacitor 10 nf ? 6 +6 kv esd charged device model following jesd22 ? c101/ae c ? q100 ? 011 all pins ? 500 +500 v corner pins ? 750 +750 v tj_mr junction temperature ? 40 +170 c tstg storage temperature range ? 55 +150 c msl moisture sensitivity level (max. 260 c processing) msl2 stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability.
NCV7462 http://onsemi.com 7 table 3. recommended operating conditions symbol parameter min max unit vop_vs_par power supply voltage for for valid parameter specifications 6 18 v vop_vs_func power supply for correct functional behavior 5 28 v vop_wu1 ? 3 wake dc and transient voltage 0 vs v vop_opout1/2 opamp analog output voltage range 0 vs v vop_out1 ? 4 vop_out_hs high ? side output voltage range 0 vs v vop_ls1/2 ls1/2 pin voltage range dc ls1/2 pin transient voltage range (during flyback) 0 0 40 65 v v vop_lin vop_inh lin and inh pin voltage range 0 vs v vop_canh/l vop_vsplit dc voltage on pin canh, canl and vsplit 0 vcc_can v vop_vr1 stabilized supply voltage 4.9 5.1 v vop_vr2 stabilized supply voltage 4.9 5.1 v vop_vcc_can_normal supply input for the can transceiver for normal operation (transmission and reception) 4.75 5.25 v vop_vcc_can_lowpower supply input for the can transceiver for low ? power operation (can wakeup detection) 0 5.25 v vop_digio dc voltage at digital pins (rxdc, nres, rxdl/intn, sdi, sdo, sclk, csn) 0 vr1 v vop_op1/2(+/ ? ) opamp input voltage range ? 0.2 3 v vop_txdl(c)/flash dc voltage at txdl/flash and txdc/flash inputs 0 18 v tj_op junction temperature ? 40 +150 c table 4. thermal characteristics symbol parameter test condition min typ max unit thermal protection tjw thermal warning level 120 130 140 c tjw_hys thermal warning hysteresis 5 c tjsd1 thermal shut ? down level 1 130 140 150 c tjsd1_hys thermal shut ? down 1 hysteresis 5 c tjsd2 thermal shut ? down level 2 140 155 170 c tjsd2_hys thermal shut ? down 2 hysteresis 5 c thermal resistance rth_jc thermal resistance junction ? to ? case 3.5 c/w rth_ja thermal resistance junction ? to ? ambient see figure below c/w
NCV7462 http://onsemi.com 8 figure 4. thermal resistance junction ? to ? ambient 100 90 80 70 60 50 40 30 20 10 0 0 200 400 600 1200 1000 800 top copper plane area (mm 2 ) r thja ( c/w) 1s0p, 1 oz cu 1s0p, 1 oz cu 1s2p, 1 oz cu 1s2p, 1 oz cu electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 5. vs supply symbol parameter test condition min typ max unit vs supply voltage functional voltage regulators with deteriorated performance 5 28 v parameter specification 6 18 vs_por vs por threshold 2.8 3.45 4.1 v vs_uv vs uv ? threshold voltage 5.11 5.81 v vs_uv_hyst undervoltage hysteresis 0.04 0.1 0.2 v vs_ov vs ov ? threshold voltage 20 22 v vs_ov_hyst overvoltage hysteresis 0.5 1 1.5 v i_vs_sleep vs consumption in sleep mode sleep mode vs = 12 v, vr1/2 are off, bus communication off no wake ? up request pending, outx = floating t j = 85 c (note 1) 10 30 60 a i_vs_sleep_cs vs consumption in sleep mode (with cyclic sense) sleep mode vs = 12 v, vr1/2 are off, bus communication off t2_per = 50 ms, t2_ton = 100 s no wake ? up request pending t j = 85 c (note 1) 40 70 130 a i_vs_stdby vs consumption in standby mode standby mode vs = 12 v, vr1 not loaded, vr2 off vr1 current comparator enabled outx = floating bus communication off, no cyclic sensing no wake ? up request pending t j = 85 c (note 1) 30 70 80 a i_vs_stdby_cs vs consumption in standby mode (with cyclic sense) standby mode vs = 12 v, vr1 not loaded, vr2 off vr1 current comparator enabled t2_per = 50 ms, t2_ton = 100 s bus communication off no wake ? up request pending t j = 85 c (note 1) 100 a i_vs_norm vs consumption in normal mode normal mode vr1/2 are on (unloaded) outx = floating, txd lin/can not active, opamp outputs not loaded 4.5 10 ma 1. values based on design and characterization, not tested in production.
NCV7462 http://onsemi.com 9 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 6. voltage regulator vr1 symbol parameter test condition min typ max unit v_vr1 regulator output voltage 0 ma i(vr1) 250 ma, 6 v vs 27 v 4.9 5 5.1 v iout_vr1 regulator output current ? 250 ma ilim_vr1 regulator current limitation ? 1000 ? 800 ? 400 ma vdrop_vr1 dropout voltage i(vr1) = 100 ma, vs = 5 v 0.25 0.4 v i(vr1) = 100 ma, vs = 4.5 v 0.3 0.5 i(vr1) = 50 ma, vs = 4.5 v 0.2 0.4 loadreg_vr1 load regulation 1 ma i(vr1) 50 ma ? 30 10 30 mv linereg_vr1 line regulation i(vr1) 5 ma 6 v vs 18 v ? 30 10 30 mv ttsd_vr1 vr1 deactivation time after thermal shutdown 1 s cload_vr1 vr1 load capacitor esr < 200 m 1 f icmp_vr1_rise current comp. rising threshold vr1 consumption increasing 0.7 1.7 3 ma icmp_vr1_fall current comp. falling threshold vr1 consumption decreasing t j = ? 40 ? 130 c 0.5 1.1 2 ma icmp_vr1_hys current comp. hysteresis 0.5 ma vfail_vr1 vr1 fail threshold vr1 forced 2 v tfail_vr1 vr1 fail blanking time 5 s tshort_vr1 vr1 short blanking time 4 ms table 7. voltage regulator vr2 symbol parameter test condition min typ max unit v_vr2 output voltage tolerance 0 ma i(vr1) 50 ma 6 v vs 18 v 4.9 5 5.1 v iout_vr2 output current ? 50 ma ilim_vr2 short circuit output current ? 200 ? 11 0 ? 80 ma vdrop_vr2 dropout voltage i(vr1) = 30 ma, vs = 5 v 0.3 0.4 v loadreg_vr2 load regulation 1 ma i(vr1) 50 ma ? 30 10 30 mv linereg_vr2 line regulation i(vr1) 5 ma 6 v vs 18 v ? 30 10 30 mv cload_vr2 load capacitor esr < 200 m 0.22 f vfail_vr2 vr2 fail threshold vr2 forced 2 v tfail_vr2 vr2 fail blanking time 2 s tshort_vr2 vr2 short blanking time 4 ms
NCV7462 http://onsemi.com 10 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 8. vr1 under ? voltage detector symbol parameter test condition min typ max unit vr1_res1 vr1 reset threshold 1 (default) spi vr1_res.x = 00 4.33 4.5 4.67 v vr1_res2 vr1 reset threshold 2 spi vr1_res.x = 01 4.135 4.3 4.465 v vr1_res3 vr1 reset threshold 3 spi vr1_res.x = 10 3.69 3.9 4.16 v vr1_res4 vr1 reset threshold 4 spi vr1_res.x = 11 3.44 3.7 3.91 v tdel_vr1_res reaction delay between vr1 undervoltage and nres low pulse 6 40 s tflt_vr1_res vr1 undervoltage filter time 16 s t_nres nres pulse length after vr1 undervoltage release 2 ms table 9. vcc_can supply input symbol parameter test condition min typ max unit ivcan_norm_rec consumption from vcc_can pin can enabled; normal mode; recessive transmitted 4.75 v < vcc_can < 5.25 v 10 ma ivcan_norm_dom can enabled; normal mode; dominant transmitted 4.75 v < vcc_can < 5.25 v bus termination 60 75 ma ivcan_lowpower can wakeup detector active (supplied from vs); standby or sleep mode; no wakeup detected; 0 v < vcc_can < 5.25 v; t j = 85 c (note 2) 6 a vfail_vcan vcan undervoltage threshold 4 4.3 4.65 v vfail_hyst_vcan vcc_can hystheresis normal mode 100 mv tfail_vcan vcan fail blanking time 2 s 2. values based on design and characterization, not tested in production.
NCV7462 http://onsemi.com 11 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 10. high ? side outputs (out1 ? 4) symbol parameter test condition min typ max unit ron_out1_low on ? resistance to vs, out1 in ?low ? ohmic? configuration t j = 25 c, i(out1) = ? 100 ma 2 t j = 125 c 3.3 ron_out1_high on ? resistance to vs, out1 in ?normal ? ohmic? configuration t j = 25 c, i(out1) = ? 60 ma 7 t j = 125 c 13 ron_out2 ? 4 on ? resistance to vs t j = 25 c, i(out2 ? 4) = ? 60 ma 7 t j = 125 c 13 ilim_out1_low output current limitation to ground, out1 in ?low ? ohmic? configuration v(out1) = 0 v ? 500 ? 375 ? 250 ma ilim_out1_high output current limitation to ground, out1 in ?normal ? ohmic? configuration v(out1) = 0 v ? 330 ? 235 ? 140 ma ilim_out2 ? 4 output current limitation to ground v(out2 ? 4) = 0 v ? 330 ? 235 ? 140 ma iuld_out1_low out1 underload threshold, out1 in ?low ? ohmic? configuration ? 30 ? 16 ? 4 ma iuld_out1_high out1 underload threshold, out1 in ?normal ? ohmic? configuration ? 6.5 ? 3.5 ? 0.8 ma iuld_out2 ? 4 out2 ? 4 underload threshold ? 6.5 ? 3.5 ? 0.8 ma ileak_out1 ? 4_norm output leakage current, normal mode vs = 28 v v(out1 ? 4) = 0 v ? 3 a ileak_out1 ? 4_stdby output leakage current, standby or sleep mode vs = 28 v v(out1 ? 4) = 0 v ? 3 a slew_out1_low slew rate of out1, out1 in ?low ? ohmic? configuration vs = 13.2 v 250 ma resistive load 0.2 0.5 0.8 v/ s slew_out1_high slew rate of out1, out1 in ?normal ? ohmic? configuration vs = 13.2 v 140 ma resistive load 0.2 0.5 0.8 v/ s slew_out2 ? 4 slew rate of out2 ? 4 vs = 13.2 v 140 ma resistive load 0.2 0.5 0.8 v/ s tblank_uld_out1 ? 4 underload detection blanking delay 80 s tfilt_uld_out1 ? 4 underload detection filter time 60 s tfilt_old_out1 ? 4 overload shutdown filter time 60 s
NCV7462 http://onsemi.com 12 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 11. high ? side output (out_hs) symbol parameter test condition min typ max unit ron_out_hs on ? resistance to vs t j = 25 c, i(out_hs) = ? 150 ma 1 1.5 t j = 125 c 1.6 3 ilim_out_hs output current limitation to ground v(out_hs) = 0 v ? 1900 ? 1500 ? 1000 ma iuld_out_hs underload detection threshold ? 120 ? 80 ? 40 ma ileak_out_hs_norm output leakage current, normal mode v(out_hs) = 0 v ? 3 a ileak_out_hs_stdby output leakage current, standby or sleep mode v(out_hs) = 0 v ? 3 a slew_out_hs slew rate of out_hs vs = 13.2 v resistive load 480 ma 0.2 0.5 0.8 v/ s tblank_uld_out_hs underload detection blanking delay 80 s tfilt_uld_out_hs underload detection filter time 60 s tfilt_old_out_hs overload shutdown filter time 120 s tflt_ocr over ? current recovery filter time 400 s table 12. low ? side relay output (ls1/2) symbol parameter test condition min typ max unit ron_ls1/2 on ? resistance to ground t j = 25 c, i(ls1/2) = 100 ma 3.3 ilim_ls1/2 output current limitation ls1/2 = vs 250 340 500 ma vclamp_ls1/2 output clamp voltage i(ls1/2) = 100 ma 50 65 v ileak_ls1/2_norm output leakage current, normal mode ls1/2 = vs = 16 v 3 a ileak_ls1/2_stdby output leakage current, standby or sleep mode ls1/2 = vs = 16 v 3 a slew_ls1/2 slew rate of ls1/2 vs = 13.2 v 0.2 2 4 v/ s tfilt_old_ls1/2 overload shutdown filter time 60 s
NCV7462 http://onsemi.com 13 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 13. inh high ? side switch symbol parameter test condition min typ max unit v_inh_drop high ? level voltage drop i(inh) = ? 15 ma 0.1 0.35 0.75 v i_inh_leak leakage current ? 1 1 a i_inh_lim current limitation ? 230 ? 45 ma table 14. wake ? up (wu1 ? 3) symbol parameter test condition min typ max unit vth_down_wu1 ? 3 wake ? up negative edge threshold voltage wu1 ? 3 configurable as source/sink via spi 0.4 vs 0.5 vs 0.6 vs v vth_up_wu1 ? 3 wake ? up positive edge threshold voltage wu1 ? 3 configurable as source/sink via spi 0.4 vs 0.5 vs 0.6 vs v vhyst_wu1 ? 3 wake ? up threshold hysteresis 100 300 500 mv ipullup_wu1 ? 3 pullup current 1.5 v < v(wu1 ? 3) < (vs ? 3 v) ? 30 ? 20 ? 10 a ipulldown_wu1 ? 3 pulldown current 1.5 v < v(wu1 ? 3) < (vs ? 3 v) 10 20 30 a twu_wu1 ? 3 minimum time for wake ? up 51 64 77 s table 15. current amplifier op1/2 symbol parameter test condition min typ max unit gbw_op gbw product 1 3.5 7 mhz av_dc_op dc open loop gain 80 db psrr_op power supply rejection dc, vin = 150 mv 80 db voff_op input offset voltage ? 6 6 mv vicr_op common mode input range ? 0.2 0 3 v voh_op output voltage range high i(opout1/2) = ? 1 ma vs ? 0.2 vs v vol_op output voltage range low i(opout1/2) = +1 ma 0 0.2 v ilimp_opout1/2 output current limitation+ dc 5 10 15 ma ilimn_opout1/2 output current limitation ? dc ? 15 ? 10 ? 5 ma slewp_op slew rate positive 1 4 10 v/ s slewn_op slew rate negative ? 10 ? 4 ? 1 v/ s tsat_rec output recovery time from saturation at vs or gnd 4 s
NCV7462 http://onsemi.com 14 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 16. mode transition timing symbol parameter test condition min typ max unit tdel_norm_stdby transition time from normal to standby mode via spi 300 s tdel_norm_sleep transition time from normal to sleep mode via spi 750 s tdel_stdby_norm delay of intn pulse in standby after wakeup 300 s tdel_sleep_norm transition from sleep to normal mode via wakeup 300 s tdel_norm_flash transition time from normal to flash mode via txdl(c)/flash 300 s tdel_stdby_flash transition time from standby to flash mode via txdl(c)/flash 300 s tdel_sleep_flash transition time from sleep to flash mode via txdl(c)/flash 750 s tdel_flash_norm transition from flash to normal mode via txdl(c)/flash 450 s table 17. nres and intn signal timing symbol parameter test condition min typ max unit t_nres nres low pulse duration, e.g. after a watchdog failure 2 ms t_intn intn low pulse duration after a wake ? up event 125 s
NCV7462 http://onsemi.com 15 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 18. drivers/vr2 timing symbol parameter test condition min typ max unit tdel_out_hs_on activation delay of out_hs driver (from csn rising edge) v(out_hs) > 0.2vs 60 s tdel_out_hs_off de ? activation delay of out_hs driver (from csn rising edge) v(out_hs) < 0.8vs 60 s tdel_out1 ? 4_on activation delay of out1 ? 4 driver (from csn rising edge) v(out1 ? 4) > 0.2vs 60 s tdel_out1 ? 4_off de ? activation delay of out1 ? 4 driver (from csn rising edge) v(out1 ? 4) < 0.8vs 60 s tdel_ls1/2_on activation delay of ls1/2 driver (from csn rising edge) v(ls1/2) < 0.8vs 100 s tdel_ls1/2_off de ? activation delay of ls1/2 driver (from csn rising edge) v(ls1/2) > 0.2vs 100 s tdel_vr2_on activation delay of vr2 (from csn rising edge) i(vr2) = 50 ma v(vr2) > 4 v 270 s tdel_vr2_off de ? activation delay of vr2 (from csn rising edge) i(vr2) = 50 ma v(vr2) < 4 v 200 s
NCV7462 http://onsemi.com 16 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 19. spi timing symbol parameter test condition min typ max unit tcsn_sclk first spi clock edge after csn active (note 3) 100 ns tcsn_sdo sdo output stable after csn active (note 3) 250 ns tcsn_high inter ? frame space (csn inactive) (note 3) 14 s tsclk_high duration of spi clock high level (note 3) 250 ns tsclk_low duration of spi clock low level (note 3) 250 ns tsclk_per spi clock period (note 3) 1 s tsdi_set setup time of sdi input towards spi clock (note 3) 100 ns tsdi_hold hold time of sdi input towards spi clock (note 3) 100 ns tsclk_sdo sdo output stable after spi clock falling edge (note 3) 250 ns 3. values based on design and characterization, not tested in production. csn sclk sdo t csn_sdo t sclk _p e r t sclk_low t sclk_high t csn_sclk t sdi_set t sdi_hold t sclk_sdo t csn _high sdi figure 5. spi timing parameters
NCV7462 http://onsemi.com 17 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, unless otherwise specified) table 20. window watchdog symbol parameter test condition min typ max unit twd_acc watchdog timing accuracy ? 25 25 % t_wd_to timeout watchdog period; (watchdog is in the timeout mode after nres release) 65 ms t_wd_cw window watchdog closed window spi wd_per.x = 00 6 ms spi wd_per.x = 01 24 spi wd_per.x = 10 60 spi wd_per.x = 11 120 t_wd_ow window watchdog open window spi wd_per.x = 00 10 ms spi wd_per.x = 01 40 spi wd_per.x = 10 100 spi wd_per.x = 11 200 t_wd_trig (info only) recommended window watchdog trigger period via spi (middle of the safe trigger area) spi wd_per.x = 00 9.75 ms spi wd_per.x = 01 39 spi wd_per.x = 10 97.5 spi wd_per.x = 11 195 t_wd_33_to wd_status.0 bit threshold of timeout length (in timeout mode) 31.5 % t_wd_66_to wd_status.1 bit threshold of timeout length (in timeout mode) 63 % t_wd_33_ow wd_status.0 bit threshold of open window length (in open window mode) spi wd_per.x = 00 26.5 % spi wd_per.x = 01 32 spi wd_per.x = 10 33.3 spi wd_per.x = 11 33.3 t_wd_66_ow wd_status.1 bit threshold of open window length (in open window mode) spi wd_per.x = 00 63 % spi wd_per.x = 01 76.8 spi wd_per.x = 10 66.6 spi wd_per.x = 11 66.6
NCV7462 http://onsemi.com 18 electrical characteristics ( ? 40 c t j 150 c, 5 v vs 28 v, normal mode, unless otherwise specified); the following bus loads are considered: l1 = 1 k / 1 nf; l2 = 660 / 6.8 nf; l3 = 500 / 10 nf. table 21. lin transmitter dc characteristics symbol parameter test condition min typ max unit vlin_dom_losup lin dominant output voltage txdl = low; vs = 7.3 v, l1 1.2 v vlin_dom_hisup lin dominant output voltage txdl = low; vs = 18 v, l1 2 v vlin_rec lin recessive output voltage txdl = high i(lin) = 0 ma vs ? vd (note 4) v ilin_lim lin short circuit current limitation v(lin) = 18 v 40 200 ma rslave_lin internal pull ? up resistance 20 33 47 k ilin_off_dom lin output current, bus in dominant state normal mode, driver off; vs = 12 v ? 1 ma ilin_off_dom_slp lin output current, bus in dominant state sleep mode, driver off; vs = 12 v ? 20 ? 15 ? 2 a ilin_off_rec lin output current, bus in recessive state driver off; vs = 12 v 20 a ilin_no_gnd lin current with missing gnd vs = gnd = 12 v; 0 < v(lin) < 18 v ? 1 1 ma ilin_no_vs lin current with missing vs vs = gnd = 0 v; 0 < v(lin) < 18 v 100 a 4. vd is the voltage drop over the internal pullup diode between vs and lin table 22. lin receiver dc characteristics symbol parameter test condition min typ max unit vrec_dom_lin receiver threshold lin bus recessive ? > dominant 0.4 0.5 vs vrec_rec_lin receiver threshold lin bus dominant ? > recessive 0.5 0.6 vs vrec_cnt_lin receiver centre voltage (vbus_dom + vbus_rec) / 2 0.475 0.525 vs vrec_hys_lin receiver hysteresis (vbus_rec ? vbus_dom) 0.05 0.175 vs vrec_rec_slp_lin lin wake receiver threshold sleep or standby mode vs ? 3.3 vs ? 1.1 v
NCV7462 http://onsemi.com 19 electrical characteristics ( ? 40 c t j 150 c, 5 v vs 28 v, normal mode, unless otherwise specified); the following bus loads are considered: l1 = 1 k / 1 nf; l2 = 660 / 6.8 nf; l3 = 500 / 10 nf. table 23. lin transmitter dynamic characteristics symbol parameter test condition min typ max unit d1 duty cycle 1 = tbus_rec(min) / (2 x tbit) threc(min) = 0.744 x vs thdom(min) = 0.581 x vs tbit = 50 s vs = 7 v to 18 v 0.396 0.5 ? d2 duty cycle 2 = tbus_rec(max) / (2 x tbit) threc(max) = 0.422 x vs thdom(max) = 0.284 x vs tbit = 50 s vs = 7.6 v to 18 v 0.5 0.581 ? d3 duty cycle 3 = tbus_rec(min) / (2 x tbit) threc(min) = 0.788 x vs thdom(min) = 0.616 x vs tbit = 96 s vs = 7 v to 18 v 0.417 0.5 ? d4 duty cycle 4 = tbus_rec(max) / (2 x tbit) threc(max) = 0.389 x vs thdom(max) = 0.251 x vs tbit = 96 s vs = 7.6 v to 18 v 0.5 0.59 ? t_fall_lin lin falling edge vs = 12 v; l1, l2; normal slope mode 22.5 s t_rise_lin lin rising edge vs = 12 v; l1, l2; normal slope mode 22.5 s t_sym_lin lin slope symmetry normal mode; vs = 12 v; l1, l2 ? 4 0 4 s t_fall_norm_lin lin falling edge vs = 12 v; l3; normal slope mode 27 s t_rise_norm_lin lin rising edge vs = 12 v; l3; normal slope mode 27 s t_sym_norm_lin lin slope symmetry vs = 12 v; l3; normal slope mode ? 5 0 5 s t_fall_low_lin lin falling edge vs = 12 v; l3; low slope mode 62 s t_rise_low_lin lin rising edge vs = 12 v; l3; low slope mode 62 s t_txdl_timeout txdl dominant time ? out selected by spi bits txdl_to spi setting ?00? 27 55 70 ms spi setting ?01? 6 13 20 spi setting ?1x? disabled c_lin capacitance of the lin pin guaranteed by design; not tested in production 15 25 pf
NCV7462 http://onsemi.com 20 electrical characteristics ( ? 40 c t j 150 c, 5 v vs 28 v, normal mode, unless otherwise specified); the following bus loads are considered: l1 = 1 k / 1 nf; l2 = 660 / 6.8 nf; l3 = 500 / 10 nf. table 24. lin receiver dynamic characteristics symbol parameter test condition min typ max unit trec_prop_down propagation delay of receiver falling edge 6 s trec_prop_up propagation delay of receiver rising edge 6 s trec_sym propagation delay symmetry trec_prop_down ? trec_prop_up ? 2 2 s t_lin_wake dominant duration for wakeup 30 90 150 s t bus_dom(min) lin t th rec(max) th rec(min) th dom(max) th dom(min) t bus _dom (max ) t bus_rec(max) t bus _rec (min ) t bit t bit 50% thresholds of receiving node 1 thresholds of receiving node 2 txdl t figure 6. lin dynamic characteristics ? duty cycles t_fall t_rise lin t 60% 40% 60% 40% 100% 0% figure 7. lin dynamic characteristics ? transmitter slope
NCV7462 http://onsemi.com 21 electrical characteristics ( ? 40 c t j 150 c, 5 v vs 28 v, normal mode, unless otherwise specified); the following bus loads are considered: l1 = 1 k / 1 nf; l2 = 660 / 6.8 nf; l3 = 500 / 10 nf. 50% trec_prop_up rxdl t lin t vs 60% vs 40% vs trec_prop_down figure 8. lin dynamic characteristics ? receiver recessive lin t t_lin_wake 40% vs detection of remote wake ? up vs 60% vs dominant figure 9. lin wakeup
NCV7462 http://onsemi.com 22 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, normal mode, unless otherwise specified) table 25. can transmitter dc characteristics symbol parameter test condition min typ max unit vo(reces)(canh) recessive bus voltage at pin canh v(txdc) = vr1 no load, transmitter on 2 2.5 3 v vo(reces)(canh) recessive bus voltage at pin canh no load, transmitter off ? 0.1 0 0.1 v vo(reces)(canl) recessive bus voltage at pin canl v(txdc) = vr1 no load, transmitter on 2 2.5 3 v vo(reces)(canl) recessive bus voltage at pin canl no load, transmitter off ? 0.1 0 0.1 v io(reces)(canh) recessive output current at pin canh ? 35 v < v(canh) < 35 v 0 v < vcc_can < 5.25 v ? 2.5 2.5 ma io(reces)(canl) recessive output current at pin canl ? 35 v < v(canl) < 35 v 0 v < vcc_can < 5.25 v ? 2.5 2.5 ma vo(dom)(canh) dominant output voltage at pin canh v(txdc) = 0 v 42.5 < rl < 60 3 3.6 4.25 v vo(dom)(canl) dominant output voltage at pin canl v(txdc) = 0 v 42.5 < rl < 60 0.5 1.4 1.75 v vo(dif)(bus_dom) differential bus output voltage (vcanh ? vcanl ) v(txdc) = 0 v 42.5 < rl < 60 1.5 2.25 3 v vo(dif)(bus_rec) differential bus output voltage (vcanh ? vcanl ) v(txdc) = vr1 recessive, no load ? 120 0 50 mv io(sc)(canh) short ? circuit output current at pin canh v(canh) = 0 v, v(txdc) = 0 v ? 120 ? 80 ? 45 ma io(sc)(canl) short ? circuit output current at pin canl v(canl) = 0 v, v(txdc) = 0 v 45 80 120 ma
NCV7462 http://onsemi.com 23 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, normal mode, unless otherwise specified) table 26. can receiver dc characteristics symbol parameter test condition min typ max unit vi(dif)(th) differential receiver threshold voltage ? 5 v < v(canh) < 12 v ? 5 v < v(canl) < 12 v 0.5 0.7 0.9 v vihcm(dif)(th) differential receiver threshold voltage for high common mode ? 35 v < v(canh) < 35 v ? 35 v < v(canl) < 35 v 0.4 0.7 1 v ri(cm)canh common mode input resistance at pin canh 15 26 37 k ri(cm)canl common mode input resistance at pin canl 15 26 37 k ri(cm)(m) matching between pin canh and pin canl common mode input resistance v(canh) = v(canl) ? 3 0 3 % ri(dif) differential input resistance 25 50 75 k ci(canh) input capacitance at pin canh v(txdc) = vcc_can not tested in production 7.5 20 pf ci(canl) input capacitance at pin canl v(txdc) = vcc_can not tested in production 7.5 20 pf ci(dif) differential input capacitance v(txdc) = vcc_can not tested in production 3.75 10 pf ili input leakage current at pin canh and canl vcc_can = 0 v v(canh) = 5 v v(canl) = 5 v ? 5 0 5 a vi(dif)(th) differential receiver threshold voltage for the wakeup detection ? 12 v < v(canh) < 12 v ? 12 v < v(canl) < 12 v 0.4 0.8 1.15 v
NCV7462 http://onsemi.com 24 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, normal mode, unless otherwise specified) table 27. can dynamic characteristics symbol parameter test condition min typ max unit td(txdc ? buson) delay txdc to bus active cl = 100 pf between canh ? canl 20 85 110 ns td(txdc ? busoff) delay txdc to bus inactive cl = 100 pf between canh ? canl 30 60 110 ns td(buson ? rxdc) delay bus active to rxdc c(rxdc) = 15 pf 25 55 105 ns td(busoff ? rxdc) delay bus inactive to rxdc c(rxdc) = 15 pf 30 100 105 ns tdpd(txdc ? rxdc)dr propagation delay txdc to rxdc cl = 100 pf between canh ? canl 75 245 ns tdpd(txdc ? rxdc)rd propagation delay txdc to rxdc cl = 100 pf between canh ? canl 75 230 ns tdbus ? hovr dominant time for wake ? up via bus lp mode vdif(dom) > 1.4 v 0.5 2.5 5 s tdbus ? lovr dominant time for wake ? up via bus lp mode vdif(dom) > 1.2 v 0.5 3 5.8 s t_txdc_timeout txdc dominant time for time out v(txdc) = 0 v 300 650 1000 s dominant 0.9v 0.5v recessive 50% recessive 50% txdc canh canl rxdc td(txdc ? buson) td(buson ? rxdc) td(txdc ? rxdc)rd td(txdc ? busoff) td(busoff ? rxdc) td(txdc ? rxdc)dr figure 10. can dynamic characteristics
NCV7462 http://onsemi.com 25 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, normal mode, unless otherwise specified) table 28. vsplit characteristics symbol parameter test condition min typ max unit vsplit reference output voltage at pin vsplit transmitter on ? 500 a < isplit < 500 a 0.3 0.5 0.7 vcc_ can isplit(li100) vsplit leakage current transmitter off ? 40 v < vsplit < 40 v tjunc < 100 c ? 1 0 1 ua isplit(li) vsplit leakage current transmitter off ? 40 v < vsplit < 40 v ? 5 0 5 ua isplit(lim) absolute value of limitation current at 35 v on vsplit transmitter on 1.3 3 5 ma table 29. rxdl/intn, rxdc, sdo outputs symbol parameter test condition min typ max unit ioutl_pinx low ? level output driving current pinx is logical low forced v(pinx) = 0.4 v 2 5 12 ma iouth_pinx high ? level output driving current pinx is logical high forced v(pinx) = vr1 ? 0.4 v ? 12 ? 5 ? 2 ma ileak_hz_pinx leakage in the tristate, pin sdo pinx in the hz state forced 0 v < v(pinx) < vr1 ? 5 5 a table 30. nres output symbol parameter test condition min typ max unit voutl_nres low ? level output voltage vr1 < 1 v, i(nres) = 1 ma 0.2 0.4 v rpullup_nres internal pull ? up resistor to vr1 55 100 185 k
NCV7462 http://onsemi.com 26 electrical characteristics ( ? 40 c t j 150 c, 6 v vs 18 v, normal mode, unless otherwise specified) table 31. txdx/flash, sdi, sclk, csn inputs symbol parameter test condition min typ max unit vinl_pinx low ? level input voltage 0 0.8 v vinh_pinx high ? level input voltage 2 vr1 v vin_hys_pinx input voltage hysteresis 100 500 mv rpullup_pinx internal pull ? up resistor to vr1; pins txdc/flash, txdl, csn 55 100 185 k rpulldown_pinx internal pull ? down resistor to ground; pins sdi, sclk 55 100 185 k vinl_flash input low level for flash mode entry, pins txdc/flash, txdl/flash vr1 2.5 v vr1 + 1.5 vr1 + 2.5 vr1 + 3.5 v vinh_flash input high level for flash mode entry, pins txdc/flash, txdl/flash vr1 + 2.5 vr1 + 3.3 vr1 + 4.3 v vin_hys_flash input hysteresis, pins txdc/flash, txdl/flash 0.4 0.8 1.1 v
NCV7462 http://onsemi.com 27 functional description the NCV7462 is a monolithic lin/can system ? basic ? chip with enhanced feature set useful in automotive body control systems. besides the bus interfaces the ic features two 5 v voltage regulators, several high ? side and low ? side switches to control leds and relays plus supervision functionality like a window watchdog. this allows a highly integrated solution by replacing external discrete components while maintaining the valuable flexibility. due to this the board space and ecu weight can be minimized to the lowest level. power supply and regulators vs ? main power supply vs pin is the main power supply of the device. in the application, it will be typically connected to the kl30 or kl15 car node. it is necessary to provide an external reverse ? polarity protection and filtering capacitor on the vs supply ? see figure 3. vs supply is monitored with respect to the following events: ? vs power ? on reset is detected as a crossing of vs_por level (typ. 3.45 v). when vs remains below vs_por, the device is passive and provides no functionality, the spi registers are reset to their default values. when vs rises above vs_por, the device starts following its state diagram through the power ? up state. this event is latched in the spi bit ?cold_start? so that the application software can detect the vs connection. ? vs under ? voltage is detected when vs falls below vs_uv threshold (typ. 5.5 v). a vs under ? voltage can be encountered, for example, with a discharged car battery or during engine cranking. the high ? side and low ? side drivers are typically forced off in order to protect the loads and lin transmission is disabled. the exact driver reaction depends on the spi control settings ? see par. ?vs over ? and under ? voltage?. under ? voltage events are flagged through spi bit ?vs_uv?. ? vs over ? voltage is detected when vs rises over vs_ov threshold (typ. 21 v). similarly to the under ? voltage, high ? side and low ? side drivers are de ? activated based on the spi settings and the event is flagged through spi bit ?vs_ov?. gnd1, gnd2 ? ground connections the device ground connection is split to two pins ? gnd1 and gnd2. both pins have to be connected on the application pcb. regulator vr1 vr1 is a low ? drop output regulator providing 5 v voltage derived from the vs main supply. it is able to deliver up to 250 ma and is primarily intended to supply the application microcontroller unit (mcu) and related 5 v loads (e.g. its own mcu ? related digital inputs/outputs). an external capacitor needs to be connected on vr1 pin in order to ensure the regulator?s stability and to filter the disturbances caused by the connected loads. the vr1 pin can also be used in the application to supply the on ? chip can transceiver through the dedicated input pin vcc_can. the supply line must be carefully filtered by external components in this case so that the mutual disturbances between the can communication line and the other vr1 loads (mainly mcu) are limited. vr1 voltage is supplying all digital low ? voltage input/output pins. the protection and monitoring of the vr1 regulator consist of the following features: ? vr1 current limitation ? the current protection ensures fast enough charging of the external capacitor at start ? up while protecting the regulator in case of shorts to ground ? junction temperature monitor ? the junction temperature is monitored and when it rises above the second shutdown level, the vr1 regulator is de ? activated for a defined period of time (typ. 1 sec). in case of re ? occurring thermal shutdowns, the device is forced to the sleep mode in order to protect the regulators and the full application. for details, see par. ?thermal protection?. ? vr1 failure comparator ? during the vr1 start ? up and operation, the vr1 voltage is continuously compared with vfail_vr1 level (typ. 2 v). during startup, if vr1 does not rise above vfail_vr1 level within tshort_vr1 (typ. 4 ms), it?s considered shorted to ground and the device is forced to sleep mode. during the vr1 operation, any dip below vfail_vr1 level longer than tfail_vr1 (typ. 5 s) is considered a failure ? temporary excursions of vr1 under the failure threshold can be caused, for example, by emc, and can lead to memory data inconsistencies inside the mcu. both the failure during vr1 startup and the operation are latched in the ?vr1_fail? spi bit for subsequent software diagnostics. ? vr1 reset comparator ? the vr1 regulator output is compared with a reset level vr1_res (programmable to typ. 74%, 79%, 87% and 91% of the nominal vr1 voltage). if the vr1 level drops below this level for longer than tflt_vr1_res (typ. 16 s), a reset towards the mcu is generated through the nres pin and all outputs (out1 ? 4, ls1/2, vr2) are switched off until nres pin becomes high and watchdog is served correctly. ? vr1 consumption monitor (icmp) ? to ensure a safe transition into the standby mode, where vr1 remains active while the watchdog is off, the vr1 current consumption is monitored. the watchdog is really
NCV7462 http://onsemi.com 28 disabled in the standby mode only when the vr1 consumption falls below icmp_vr1_fall (typ. 1.1 ma). an increase of the vr1 consumption above the icmp_vr1_rise level activates the watchdog again. figure 11. vr1 monitoring >tfail_vr1 tflt_vr1_res tdel_vr1_res NCV7462 http://onsemi.com 29 can transceiver supply vcc_can the on ? chip can transceiver block uses two supply paths: ? from the vcc_can supply input: in the normal mode, when the transceiver is ready for transmission/reception. ? from the vs supply through internal pre ? regulators ? in standby and sleep modes, the transceiver monitors bus for remote wakeups. the vcc_can supply is not used. for correct can transceiver function in the normal mode, the vcc_can pin must be decoupled with an external capacitor to ground. in the normal operating mode, vcc_can supply input is monitored with an under ? voltage comparator with level vfail_vcan (typ. 4.3 v). the output of the under ? voltage detector can be read through spi status bit ?vcan_uv?. this bit is a direct read ? out (without latching) of the comparator?s output. when the can transceiver is enabled, a vcc_can under ? voltage is additionally latched in the spi status bit ?vcan_fail? for subsequent diagnostics. can transceiver functionality is disabled during vcc_can under ? voltage. communication transceivers lin transceiver the NCV7462 on ? chip lin transceiver is an interface between a physical lin bus and the lin protocol controller. it is compatible to lin2.1 and j2602 specifications. unlike the can transceiver, the lin is supplied solely from the vs pin and its state control is therefore simpler: ? in the normal mode of the device, lin transceiver transmits dominant or recessive symbols on the lin bus based on the logical level on txdl pin. the signal received from the bus is indicated on rxdl pin. both logical pins are referred to the vr1 supply. a resistive pull ? up path of typ. 30 k is internally connected between lin and vs. lin pin remains recessive regardless the txdl pin state during vs under ? voltage. see par ?vs over ? and under ? voltage? for details. ? in the standby and sleep modes of the device, the lin transceiver is in its wakeup detection state. logical level on txdl is ignored and pin rxdl is kept high until it?s used as an interrupt request signal. a lin bus wakeup corresponds to a dominant symbol at least t_lin_wake long (typ. 90 s) followed by a rising edge (i.e. transition to recessive) ? see figure 9. in this way, false wakeups due to permanent lin dominant failures are avoided. only a pull ? up current of typ. 15 a is connected between vs and lin instead of the 30 k pull ? up path. the lin wakeup detection is by default active in the standby and sleep modes and can be disabled via spi control registers. the lin transceiver features spi ? configurable txdl dominant time ? out timer. this circuit, if enabled, prevents the bus lines being driven to a permanent dominant state (blocking all network communication) if pin txdl is forced permanently low by a hardware and/or software application failure. the timer is triggered by a negative edge on pin txdl. if the duration of the low ? level on pin txdl exceeds the internal timer value t_txdl_timeout, the transmitter is disabled, driving the bus into a recessive state and the event is latched in the spi status bit ?to_txdl?. the transmission is de ? blocked when ?to_txdl? bit is reset by the corresponding register ?read and clear?. the lin transceiver provides two lin slope control modes, configured by spi bit ?lin_slope?. in normal slope mode the transceiver can transmit and receive data via lin bus with speed up to 20 kbaud according lin2.1 specification. this mode is used by default. in low slope mode the slew rate of the signal on the lin bus is reduced (rising and falling edges of the lin bus signal are longer). this further reduces the emc emission. as a consequence the maximum speed on the lin bus is reduced to 10 kbaud. this mode is suited for applications where the communication speed is not critical. the low slope mode can be configured by setting spi bit ?lin_slope?. can transceiver NCV7462 contains a high ? speed can transceiver compliant with iso11898 ? 2 and iso11898 ? 5. it consists of the following sub ? blocks: transmitter, receiver, wakeup detector, and common ? mode stabilization pin vsplit can transceiver control in the normal mode of the device is shown in table 32. by default, the can transceiver is ready to provide the full ? speed interface between the bus and a can controller connected on pins rxdc (received data) and txdc (data to transmit). through two dedicated spi control bits, the can transceiver can be fully disabled or configured to ?listen ? only? functionality (rxdc pin continues to signal the received data while the logical level on txdc is ignored and the transmitter remains in recessive). the bus common mode can be additionally stabilized by using a split termination with the central tap connected to the vsplit pin. the transceiver and the vsplit are supplied from vcc_can supply input. in order to prevent a faulty node from blocking the bus traffic, the maximum length of the transmitted dominant symbol is limited by a time ? out counter to t_txdc_timeout (typ. 650 s). in case the txdc low signal exceeds the timeout value, the transmitter returns automatically to recessive and the event is latched in the spi bit ?to_txdc?. the transmission is again de ? blocked when ?to_txdc? bit is reset by the corresponding register ?read and clear?. when the can transceiver is enabled in the normal operating mode, an under ? voltage of vcc_can automatically blocks transmission and reception (recessive sent to the bus and rxdc remains high regardless the real can bus state). when the vcc_can returns above the
NCV7462 http://onsemi.com 30 under ? voltage level, the logical path between the transceiver and the rxdc/txdc pins is immediately restored. table 32. can transceiver control in normal mode conditions and spi control can transceiver behavior and spi flags vcc_can can_dis can_lsto transceiver vsplit txdc rxdc vcan_uv vcan_fail >vfail_vcan 0 0 on vcc_can/2 data to transmit received data 0 keeps previous state until read&clear 0 1 on vcc_can/2 ignored received data 1 x powered ? down hz ignored 1 NCV7462 http://onsemi.com 31 are identical to the outx high ? side drivers, only with different parametrical values. at the vs power ? up or wakeup from the sleep mode, out_hs driver is off. immediately after the device enters the normal mode, it can be set to one of the following states via the corresponding spi bits: ? off in all modes (default) ? on in all modes, except forced sleep mode ? periodical activation controlled by timer 1 or timer 2 in all modes, except forced sleep mode ? pwm control in normal mode and standby or sleep mode with cyclic sense active out_hs output is protected by the following features in normal and cyclic ? sense standby and sleep modes: ? over ? current protection and current limitation ? under ? load detection ? thermal protection and vs under/over ? voltage protection additionally, out_hs can be configured to bypass the over ? current protection in case the connected load requires an important initial driving current (typically the inrush current with incandescent bulbs). this feature is referred to as over ? current auto ? recovery. an over ? current on out_hs longer than tblank_old_out_hs (typ. 120 s) will be latched to the spi status bit and the driver will be switched off. however, if the spi control bit ?out_hs_ocr? is set high, out_hs will be automatically re ? activated after tflt_ocr (typ. 400 s) and no spi status bit ?out_hs_oc? is set. if the over ? current condition persists, the driver enters into oscillations with typ. 120 s on, 400 s off (exact values depending on the load character). typically, the mcu software will disable the auto ? recovery once the load is supposed to settle (e.g. the bulb is heated up). low ? side drivers ls1/2 NCV7462 offers two low ? side drivers ls1 and ls2 primarily intended to drive relays, typically: ? r = 160 10%, l = 240/300 mh ? r = 220 10%, l = 330/420 mh for the relay demagnetization, ls1/2 drivers feature active flyback clamps towards ground (no diode to vs) allowing to keep the load off even under load ? dump condition on vs. alternatively, ls1/2 can drive led?s. ls1/2 can be configured in one of the following states: ? off in all modes (default) ? on in the normal mode; off in all other modes ? controlled by individual pwm in the normal mode; off in all other modes ls1/2 is protected by: ? over ? current protection and current limitation: if the driver current exceeds the over ? current limit for longer than tfilt_old_ls1/2 (typ. 60 s), the event is latched into the spi status bits and the driver is disabled. it will be again enabled only when the corresponding spi flag is read and cleared. ? thermal protection and vs under/over ? voltage protection: through monitoring of the junction temperature and the vs supply voltage; all loads are protected as described in par. ?protection?. inh output inh high ? side output is primarily intended to control an external regulator or the lin master pull ? up (see figure 3). when the driver is active, it connects inh pin to the vs supply through a switch (on resistance typ. 23 ). by default, inh is on in the normal mode and off in the standby and sleep modes. it can be switched off in all modes by setting spi control bit ?inh_off? high. inh driver is neither over ? current nor under ? load protected ? the output current is limited but inh will not be automatically switched off in case a current limitation is encountered. in the normal mode, it will be always switched off in case of the second thermal shutdown. wake ? up inputs wu1 ? 3 NCV7462 offers three independent contact ? monitoring inputs wu1 ? 3 which can be used either for normal ? mode contact polling or for contact change detection during the standby and sleep modes. in any mode, every wux input can be configured into one of the following modes of operation: ? static sense: the corresponding wux input is constantly monitored by an input comparator and a filter of typ. 64 s. in the normal mode, the result of the comparison (the input high/low state) can be polled any time through the spi status bits. in the standby and sleep modes, a change of the wux polarity (in any direction) is recognized as a wakeup event. the mcu can then recognize the exact wux wakeup source by reading ?wu_wux? spi status bits. ? cyclic sense: the wux state detection is performed periodically as fostered by one of the internal timers: timer 1 (period from 0.5 sec to 4 sec, wux is left to settle for 800 s and the state detection is then done through a filter of typ. 16 s) or timer 2 (period from 10 ms to 200 ms, on wux is left to settle for 80 s or 800 s and the state detection is then done through a filter of typ. 16 s). the result of the periodical state detection is latched into the spi status register and is not updated until the next period of the selected timer. a wakeup is detected in case sample of the wux state changes in any direction. additionally, each wu1 ? 3 input can be internally pre ? biased by a pull ? up or pull ? down current source through individual control bits. if corresponding wux wakeup is disabled, the pull ? up current source is active in the normal mode only.
NCV7462 http://onsemi.com 32 table 33. wu1 ? 3 pull ? down / pull ? up configuration mode wux_dis = 0 wux_dis=1 wux_pud = 0 wux_pud = 1 wux_pud = 0 wux_pud = 1 normal pull ? down pull ? up pull ? down pull ? up standby pull ? down pull ? up pull ? down floating sleep pull ? down pull ? up pull ? down floating in case cyclic sense is used, the wux timer settings must be correctly chosen together with the high ? side output settings. the driver physically ensuring the periodical contact supply must be set for the same timer as the contact monitor by the mcu software. operating modes NCV7462 can be configured to dif ferent operating modes in function of the application needs and the external conditions. the device resources can be enabled/disabled and the overall power consumption can be adapted to the electronic module state ? ranging from full power mode down to a very low quiescent current ?sleep? mode. the principal operating modes of NCV7462 are shown in figure 12. un ? powered and init modes as long as vs remains below the vs_por level (typ. 3.45 v), the device is held in power ? up reset. all outputs except nres are in high ? impedant state, the linear regulator outputs are off. as soon as the vs main supply exceeds the power ? on reset level, the device enters an initialization sequence represented by a transient ?init? mode. all spi registers are set to their default values, ?cold_start? spi bit is set high for subsequent diagnostics and the vr1 regulator is started. after a successful start of the vr1 regulator (i.e. vr1 exceeds the vr1_fail level in less than tshort_vr1 ? typ. 4 ms), nres is still kept low until vr1 reaches its reset level. after another 2 ms (parameter t_nres), nres is released to high and the device enters normal mode with timeout watchdog. in case vr1 does not start within tshort_vr1, it?s again disabled, spi ?vr1_fail? bit is set and the device is forced into s leep mode. the forced sleep mode can be exited via any valid wakeup event or by vs re ? connection. the initialization sequence is shown in figure 11. normal mode in this mode the device provides full functionality, all resources are available. the voltage regulator vr1 is able to source 250 ma. mcu can enable/disable the device features via spi as well as monitor the status of the device. vr1 level is monitored through reset and failure comparators ? see figure 11. when the normal mode is entered, the watchdog is started in a timeout mode; a window watchdog mode is applied after the first correct watchdog service. the watchdog has to be correctly triggered; otherwise a watchdog failure is detected resulting in reset signal to the mcu. afterwards the watchdog is re ? started in the timeout mode. after eight consecutive watchdog failures, the vr1 regulator is disabled for 200 ms and then re ? started again. if the watchdog service still fails seven more times, the device is forced into sleep mode ? the forced sleep mode can then be exited either via a wakeup or vs re ? connection. through spi bits ?mod_stby? and ?mod_sleep?, the mcu can either keep the device in the normal mode, or request transition into one of the low ? power modes ? standby or sleep. standby mode standby mode is the first low ? power mode. the voltage regulator vr1 remains active while the watchdog is disabled. the standby mode is mainly intended to keep the application powered (e.g. for ram content preservation) while the mcu is in a halt ? state (software not running). in order to make a safe transition into the standby mode, the watchdog will remain enabled even in the standby mode until the consumption from vr1 decreases below icmp_vr1_fall level (typ. 1.1 ma). when the vr1 consumption increases back above icmp_vr1_rise level (typ. 1.7 ma), the device will perform a wakeup from the standby mode to ensure supervision of the mcu software. the current supervision of vr1 can be disabled via spi by setting the bit ?icmp_stby?. vr1 also continues to be monitored by the reset circuit, which will generate a low nres pulse in case the regulator output drops below the reset level. during the standby mode, several types of wakeup events can be signaled to the mcu through intn pin: timer1 or timer2 expiration, wakeup on can or lin buses, change on wux pin (as per the spi settings), or spi activity. increased consumption from vr1 is not signaled through intn pin. after a wakeup, the watchdog is started in timeout mode and mcu can request a mode transition afterwards. sleep mode sleep mode is the mode with the lowest consumption. vr1 regulator and the watchdog are inactive. the device maintains minimum operation allowing reception of wake ? up events generated by the pins wux (as per spi settings), lin and can bus line or driven by timer1 or timer2. in case of a wake ? up event the device switches from
NCV7462 http://onsemi.com 33 the sleep mode to the normal mode (through the init mode, as the vr1 must be started similarly to the vs power ? up). forced sleep mode forced sleep mode is the mode equal to the sleep mode, but all peripherals (vr1/2, out_hs, out1 ? 4, ls1/2) and the watchdog are inactive. forced sleep mode is entered after following failure conditions: ? vr1 did not reach vfail_vr1 level (typ. 2 v) within tshort_vr1 during startup (vs connection or wakeup from sleep mode) ? fifteen consecutive watchdog failures occur ? the device junction temperature exceeded thermal shutdown level tsd2 (typ. 155 c) for eight times within one minute flash mode flash mode is identical to the normal mode with the exception of the watchdog which is disabled. neither the standby nor sleep mode can be entered (the corresponding spi requests will be ignored). the purpose of the flash mode is to enable transfer of bigger bulk of data between the mcu and a programming interface ? typically during the module ? level production. the flash mode will be entered if the voltage applied on txdl or txdc pin exceeds the corresponding comparison level vinh_flash (typ. vr1 + 3.3 v). figure 12. principal operating modes normal mode vr1: on vr2: on/off hs outputs: off/on/timer/pwm ls outputs: off/on/pwm watchdog:timeout/window can, lin: normal communication/off fso: as per fso generator nres: as per reset generator standby mode vr1: on vr2: on/off hs outputs: off/on/timer/pwm ls outputs: off watchdog: timeout/off can, lin: wakeup detection/off fso: as per fso generator nres: as per reset generator sleep mode vr1: off vr2: on/off hs outputs: off/on/timer/pwm ls outputs: off watchdog: off can, lin: wakeup detection/off fso: as per fso generator nres: low flash mode watchdog: off all functions identical to normal mode not possible to go to standby / sleep init mode (transition mode) all registers set to default vr1: started ? up vr2: off hs/ls outputs: off watchdog: started long open window can, lin: inactive nres: low fso: inactive un ? powered vs>vs_por vr1>vfail_vr1 before tshort_vr1 spi request for standby mode spi request for sleep mode wakeup followed by normal mode spi request wakeup txdl/flash > vinh_flash or txdc/flash > vinh_flash txdl/flash > vinh_flash or txdc/flash > vinh_flash txdl/flash > vinh_flash or txdc/flash >vinh_flash txdl/flash < vinl_flash and txdc/flash < vinl_flash vs icmp_vr1 for less than t_wd_to
NCV7462 http://onsemi.com 34 wake ? up events in the standby and sleep modes, NCV7462 can detect several types of wake ? up events summarized in table 34: ? in the sleep modes , a wakeup will cause a reset (low signal at nres pin) and initialization of vr1 regulator. after the release of the nres signal, the timeout watchdog will be started and the device enters the normal mode and spi registers will be set into their default values. the following events will cause wakeup from the sleep mode: ? bus wakeups through can or lin ? can be enabled/disabled through spi ? switch monitoring on wux inputs ? can be configured and enabled/disabled through spi ? timer wakeup ? timer1 and timer2 can be configured to cause a wakeup after a fixed time period ? the selected timer is started at the moment the sleep mode is requested and causes wakeup immediately when the selected time period expires. the timer wakeup can be configured and enabled/disabled by spi. ? from the standby mode , where vr1 remains active, a wakeup event will cause watchdog startup in timeout mode: ? spi wakeup (csn low and rising edge on sclk). interrupt request is generated. ? vr1 consumption wakeup (vr1 consumption exceeds the icmp_vr1_rise level; can be disabled by spi control). no interrupt request is generated. if vr1 consumption falls below the icmp_vr1_fall level within the timeout period, the watchdog is disabled again. ? bus wakeups through can or lin, switch monitoring on wux and timer wakeups have the same meaning as in the sleep mode. any of them will cause an interrupt request. every valid wakeup event starts the timeout watchdog, which then must be correctly triggered. if another wakeup event occurs during the initial timeout watchdog, it will be only registered into the spi status and will not cause an interrupt or re ? start of the watchdog. e.g., an increase of the vr1 consumption will start the watchdog timeout timer while the device remains in the standby mode. if, for example, a can wakeup is then detected, it will be latched into the spi registers, but no new interrupt will be generated and the watchdog will keep running. in all wakeup cases in the standby mode the device remains in the standby mode until it is changed. spi settings for drivers and vr2 are applied after the correct watchdog service. in case all wakeup sources are disabled while the standby or sleep mode is entered through a spi request, lin and can wakeups are automatically enabled (spi bits ?wu_lin_dis? and ?wu_can_dis? are ignored). if all the wakeup sources are disabled prior to the standby mode entry and can or lin wakeup occurs in the standby mode, the watchdog is started and has to be served within typ. 1.5 ms. otherwise, nres pulse is generated and all the spi registers are set into their default states. table 34. wakeup events device mode wakeup event spi default spi control nres pulse intn pulse standby spi n/a cannot be disabled no yes i(vr1) > icmp enabled can be enabled/disabled no bus wakeup (can or lin) enabled yes wu1 ? 3 change enabled timer1/2 wakeup disabled sleep bus wakeup (can or lin) enabled can be enabled/disabled yes no wu1 ? 3 change enabled timer1/2 wakeup disabled forced sleep bus wakeup (can or lin) enabled cannot be disabled (settings ignored) yes no wu1 ? 3 change enabled timer1/2 wakeup disabled
NCV7462 http://onsemi.com 35 watchdog the on ? chip watchdog requires that the mcu software sends specific spi messages (watchdog ?triggers? or ?services?) in a specified time frame. a correct watchdog trigger/service consists of a write access to spi register control_0 with ?wd_trig? bit inverted compared to its previous state. the watchdog timer re ? starts immediately after a successful trigger is received. a read access to the control_0 register or a write access with ?wd_trig? bit unchanged does not trigger the watchdog. the moment of the watchdog trigger corresponds to the rising edge of the csn signal (end of the spi frame). the watchdog can work in the following modes (see figures 13 and 14): ? off; the watchdog is always off in the sleep and flash modes. it is also off in the standby mode, provided that the vr1 consumption stays below the icmp limit, or when the icmp comparator is disabled. ? timeout: the watchdog works as a timeout timer. the mcu software must serve the watchdog any time before the time ? out expiration (typ. 65 ms). timeout watchdog is started after reset events (power ? up, watchdog failure, vr1 under ? voltage in normal mode, thermal shutdown 2) and by any wakeup event from both standby and sleep mode. the timeout watchdog is started regardless if the wakeup is or is not accompanied by a reset. watchdog counter position is reflected in spi status bits ?wd_status[1:0]?. ? window: the watchdog time is split to two distinct parts ? a closed window, where the watchdog may not be triggered, is followed by an open window where the mcu must send a valid watchdog trigger. window watchdog is used during the normal operating mode of the device after the initial timeout watchdog is correctly triggered. position of the watchdog counter inside the open window is reflected in spi status bits ?wd_status[1:0]?. ? failure: if the watchdog is not triggered correctly (trigger not sent during timeout or open window; or sent during the closed window), reset is generated on pin nres and the ?wd_trig? bit is reset to low. after the nres release, the watchdog always starts in the timeout mode. watchdog failures are counted and their number can be read from the spi status registers. after eight watchdog failures in sequence, the vr1 regulator is switched off for 200 ms. in case of seven more watchdog failures, vr1 is completely turned off and the device goes into forced sleep mode until a wake ? up occurs (e.g. via the lin or can bus). first successful watchdog trigger resets the failure counter. the watchdog time for window mode is selectable from four different values by spi bits ?wd_per[1:0]?. the watchdog time setting is applied only if it?s contained in an spi frame representing a correct watchdog trigger message. the setting is ignored otherwise. safe trigger of time ? out wd reset or previous wd service nominal t_wd_to ????? ????? ????? time ? out wd period safe trigger of window wd nominal t_wd_cw ???? ???? ???? window wd period nominal t_wd_ow ??? ??? ??? previous wd service ???????????? ???????????? ???????????? t_wd_trig recommended wd trigger ???????? ???????? ???????? figure 13. watchdog modes timing wd expired closed window (wd trigger would be too early)
NCV7462 http://onsemi.com 36 failed wd time ? out watchdog no failure wd started as a timeout hs drivers: as per spi/mode ls drivers: as per spi/mode vr2: as per spi/mode can, lin, inh: as per spi/mode window watchdog wd started as window (closed+open) hs drivers: as per spi/mode ls drivers: as per spi/mode vr2: as per spi/mode can, lin, inh: as per spi/mode watchdog off wd de ? activated hs drivers: as per spi/mode ls drivers: as per spi/mode vr2: as per spi can, lin, inh: as per spi/mode watchdog failure (transient state) 2 ms nres pulse increment failure counter spi bit wd_trig=0 hs drivers: off; spi bits unchanged ls drivers: off; spi bits reset to 0 vr2: off; spi bits unchanged can, lin, inh: off; spi bits unchanged time ? out watchdog failure recovery wd started as a timeout hs drivers: off ls drivers: off vr2: off can, lin, inh: off vr1 off (transient state) nres kept low for 200 ms all resources off forced sleep mode hs drivers: off ls drivers: off vr2: off inh: off can, lin: wakeup detection (standby requested and (ivr1 NCV7462 http://onsemi.com 37 protection thermal protection the device junction temperature is monitored in order to avoid permanent degradation or damage. three distinct junction temperature levels are provided ? thermal warning level tjw (typ. 130 c), thermal shutdown level 1 tjsd1 (typ. 140 c) and thermal shutdown level 2 tjsd2 (typ. 155 c). the thermal protection circuit is always active in the normal mode. it is also active in the standby and sleep modes if any of the high ? side outputs is used for cyclic switch monitoring. when the junction temperature exceeds the warning level, the event is only latched into the spi for subsequent diagnostics without any direct effect on the device configuration. when the first thermal shutdown level is exceeded, most of the power ? consuming functions are disabled (bus transceivers, high ? and low ? side drivers, vr2) while vr1 keeps running so that the mcu can still take appropriate actions. junction temperature above the second shutdown level leads to complete device de ? activation, vr1 included. vr1 is re ? started after a waiting time of one second in case the junction temperature drops below the second shutdown level. if the second thermal shutdown then re ? occurs eight times within 1 minute, the device is forced into the sleep mode. the details of the thermal protection handling are shown in figure 15 (for normal mode and standby mode with cyclic sense) and in figure 16 (for sleep mode with cyclic sense). normal mode standby mode with cyclic sense junction temperature ok thermal warning (normal, standby w/ cyclic sense) twar bit set in spi all functions continue unaffected thermal shutdown 1 (normal, standby w/ cyclic sense) tsd1 bit set in spi hs, ls drivers: permanently off inh, lin, can: as per spi/mode vr2: off vr1: on wux as per spi/mode thermal shutdown 2 (normal, standby w/ cyclic sense) increment vr1_res counter in spi tsd2 bit set in spi hs, ls drivers: permanently off inh, lin, can: off vr2: off vr1: off no wakeup detection forced sleep mode hs, ls drivers: off can, lin: wakeup detection wux: wakeups enabled, as per spi tj > tjw tj>tjsd1 twar bit read and cleared and tjtjsd2 1 sec elapsed and tjtjsd2 figure 15. thermal protection in normal and standby modes
NCV7462 http://onsemi.com 38 figure 16. thermal protection in sleep mode sleep mode with cyclic sense junction temperature ok hs outputs: cycling per spi wux: per spi can, lin: wakeup detection thermal warning (sleep mode w/ cyclic sense) twar bit set in spi hs outputs: cycling per spi wux: per spi can, lin: wakeup detection thermal shutdown 1 (sleep mode w/ cyclic sense) tsd1 bit set in spi hs outputs: continuously off wux: per spi can, lin: wakeup detection tj > tjw tj>tjsd1 normal mode wakeup wakeup wakeup tj NCV7462 http://onsemi.com 39 vs in range normal mode standby mode with cyclic sense sleep mode with cyclic sense hs, ls outputs: as per spi lin transmitter: as per spi vs under ? voltage vs_uv bit set hs outputs: off lsx: off if ls_ovuv bit=0; unaffected otherwise lin transmitter: off vs over ? voltage vs_ov bit set hs outputs: off lsx: off if ls_ovuv bit=0; unaffected otherwise lin transmitter: as per spi vsvs_ov vsvs_uv and (vs_uv bit read and cleared or vs_lockout_dis bit=1) figure 17. under ? and over ? voltage on vs supply reset signal nres nres is an open ? drain output with an internal pull ? up resistor connected to vr1. it signals reset to the mcu as a consequence of several specific events: ? vr1 under ? voltage (including vs power ? up) ? watchdog failure ? thermal shutdown level 2 ? wakeup (in case the wakeup is accompanied by reset ? see table 34) ? (forced) sleep mode the low ? level pulse on nres pins always extends t_nres (typ. 2 ms) beyond the reset event ? e.g. a watchdog failure causes a 2 ms nres low pulse; a vr1 under ? voltage causes nres pulse extending 2 ms beyond the under ? voltage disappearance. after nres pulse, which was caused by vr1 under ? voltage or watchdog failure, all outputs (out1 ? 4, ls1/2 and vr2) are inactive. spi registers content is preserved. outputs follow relevant spi register settings after the correct watchdog setting again. lin and can transmission is blocked during nres pulse. can and lin receivers are enabled if nres pulse was caused by vr1 undervoltage, disabled otherwise. a recessive ? to ? dominant edge on txdl pin after nres pulse is required to start transmission to lin bus. interrupt signal an interrupt request is used in the standby mode to indicate some of the wakeup events to the mcu ? see section ?wake ? up events?. interrupt is signaled through rxdl pin by pulling it low for typically 125 s. beside the 125 s low pulse, rxdl remains high throughout the standby mode. during normal mode, rxdl assumes its normal function (lin received data). operating amplifiers two operating amplifiers are provided for, mainly, current sensing (see figure 3). the operating amplifiers are on (i.e. biased) in the normal mode. they are powered ? down in all other modes. the input voltage common mode covers the range from ? 0.2 v to 3 v. the rail ? to ? rail (vs) output voltage allows using them together with an external pass element as additional voltage regulator. fail ? safe (fso) signal a fail ? safe signal is internally generated reflecting some critical system failures and events. by default, the signal is connected to the out3 output and over ? rules the out3 spi settings ? active fso signal switches out3 on, inactive fso signal switches out3 off. in case the spi bit ?fso_dis? is set, out3 acts as a general ? purpose high ? side driver identically to out1, 2 and 4. fso remains then only an internal signal not visible to the application. fso internal signal is active in the following cases: ? during the init phase : ? vr1 short: fso is active when vr1 is below its failure level (vfail_vr1) for more than tshort_vr1 (typ. 4 ms) during vr1 regulator startup and vs is above vs_uv threshold (typ. 5.5 v). ? in the normal and standby modes : ? vr1 under ? voltage: fso is active when vr1 is below its reset level (vr1_res). ? watchdog: fso is immediately activated in case of failed watchdog trigger. it is deactivated only when the watchdog is correctly triggered again. ? thermal shutdown: fso is active when the junction temperature is above the second shutdown threshold (tjsd2). ? in the forced sleep modes : fso is active if the forced sleep mode was entered because of a failure condition, like non ? starting vr1, repeated thermal shutdown or repeated watchdog failures. if the sleep mode is entered by a correct spi mode ? transition request, fso remains inactive.
NCV7462 http://onsemi.com 40 spi control serial peripheral interface (spi) is the main communication channel between the application mcu and NCV7462. the structure of a spi frame is shown in figure 18. mcu sta rts the frame by sending an 8 ? bit header consisting of two bits of register access mode type followed by a six ? bit address. during the header transmission, NCV7462 sends out eight bits of status information regardless the address. after the header, sixteen bits of data are exchanged. a correct spi frame has either no bits (no sclk edges during csn low; serves to read out the global status information) or exactly twenty ? four bits. if another amount of clock edges occurs during csn low, the frame is considered incorrect and the input data are always ignored. depending on the access type, the transmitted/received data are treated differently: ? during a write access, sdo signals current content of the register while new data for the same register are received on sdi. the register is refreshed with the new data after a successful completion of the frame (rising edge on csn). only the bits eligible for write access are refreshed, the input data are ignored for the others (e.g. a write access to status registers). ? for read access, the data on sdi are ignored; sdo signals data content of the register addressed by the header. after the frame completion, the register content remains unchanged regardless the type of the individual bits. ? for read and clear access, a normal register read is performed. when the frame is completed (csn rising edge), the register bits eligible for read/clear access are reset to 0. ? device rom access switches the address space to sixteen ? bit constant data memorized in the NCV7462 (indicating the device version, spi frame format and other information). input data are ignored. rw1 rw0 a5 a4 a3 a2 a1 a0 di 14 di2 di 1 di0 di 15 flt_ glob do14 do2 do1 do0 do15 x csb sclk si so register address access type input data byte 1 device status bits adress ? dependent data input data byte 0 flt_ nrdy flt_ spi flt_ vs flt_ vr1 flt_ vr2 flt_ th flt_ drv in out figure 18. spi frame
NCV7462 http://onsemi.com 41 spi frame format d23 d22 d21 d20 d19 d18 d17 d16 d15 ... d0 NCV7462 in rw1 rw0 a5 a4 a3 a2 a1 a0 di15 ... di0 NCV7462 out flt_glob flt_nrdy flt_spi flt_vs flt_vr1 flt_vr2 flt_th flt_drv do15 ... do0 inframe: spi access type rw1 rw0 description 0 0 write to spi register 0 1 read only from spi register 1 0 read and clear spi register 1 1 access device rom spi registers a5 a4 a3 a2 a1 a0 register 0 0 0 0 0 0 control_0 0 0 0 0 0 1 control_1 0 0 0 0 1 0 control_2 0 0 0 0 1 1 control_3 0 0 0 1 0 0 control_4 0 0 0 1 0 1 pwm_hs 0 0 0 1 1 0 pwm_out1/2 0 0 0 1 1 1 pwm_out3/4 0 0 1 0 0 0 pwm_ls 0 0 1 0 0 1 status_0 0 0 1 0 1 0 status_1 0 0 1 0 1 1 status_2 0 0 1 1 x x reserved 0 1 x x x x reserved 1 x x x x x reserved device rom a5 a4 a3 a2 a1 a0 data content comment 0 0 0 0 0 0 $4300 id_header 0 0 0 0 0 1 $4404 product version 0 0 0 0 1 0 $7400 product code 1 0 0 0 0 1 1 $6200 product code 2 0 0 0 1 0 0 reserved ... ... ... ... ... ... reserved 1 1 1 1 0 1 reserved 1 1 1 1 1 0 $0200 spi_frame_id 1 1 1 1 1 1 reserved
NCV7462 http://onsemi.com 42 outframe: general device status info sdo bit bit name bit content d23 flt_glob logical combination (or) of all following flags d22 flt_nrdy reserved d21 flt_spi previous spi frame faulty ? wrong number of clocks or addressing a nonexistent address d20 flt_vs vs_ov or vs_uv d19 flt_vr1 equal to vr1_fail bit d18 flt_vr2 vr2_fail or vr2_short d17 flt_th tsd2 or tsd1 or twar d16 flt_drv or combination of all overcurrent and underload bits of out_hs, outx and lsx spi registers overview in the below register overview, each bit is marked with the available spi access. every bit can be read. those marked ?rw? can be additionally written to; bits marked ?r/rc? can be additionally read and cleared. spi registers overview format control_0 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw mod_stby mod_sleep wd_trig wd_per.1 wd_per.0 icmp_stby vr2_on.1 vr2_on.0 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw vr1_res.1 vr1_res.0 can_dis can_lsto lin_slope txdl_to.1 txdl_to.0 fso_dis control_1 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw wu_can_dis wu_lin_dis wu_tim_en.1 wu_tim_en.0 wu3_dis wu2_dis wu1_dis wu3_pud d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw wu2_pud wu1_pud wu3_t.1 wu3_t.0 wu2_t.1 wu2_t.0 wu1_t.1 wu1_t.0 control_2 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw reserved reserved reserved reserved reserved reserved reserved reserved d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw t2_tper.1 t2_tper.0 t2_ton.1 t2_ton.0 t1_tper.2 t1_tper.1 t1_tper.0 t1_ton control_3 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw reserved reserved reserved reserved reserved reserved reserved reserved d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw vs_lockout _dis ls_ovuv ls2_on.1 ls2_on.0 ls1_on.1 ls1_on.0 inh_off out_hs_ocr
NCV7462 http://onsemi.com 43 control_4 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw out1_lowr out4_on.2 out4_on.1 out4_on.0 out3_on.2 out3_on.1 out3_on.0 out2_on.2 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw out2_on.1 out2_on.0 out1_on.2 out1_on.1 out1_on.0 out_hs_on.2 out_hs_on.1 out_hs_on.0 pwm_hs d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw reserved reserved reserved reserved reserved reserved reserved reserved d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw fsel_hs pw_hs.6 pw_hs.5 pw_hs.4 pw_hs.3 pw_hs.2 pw_hs.1 pw_hs.0 pwm_out1/2 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw fsel_out1 pw_out1.6 pw_out1.5 pw_out1.4 pw_out1.3 pw_out1.2 pw_out1.1 pw_out1.0 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw fsel_out2 pw_out2.6 pw_out2.5 pw_out2.4 pw_out2.3 pw_out2.2 pw_out2.1 pw_out2.0 pwm_out3/4 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw fsel_out3 pw_out3.6 pw_out3.5 pw_out3.4 pw_out3.3 pw_out3.2 pw_out3.1 pw_out3.0 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw fsel_out4 pw_out4.6 pw_out4.5 pw_out4.4 pw_out4.3 pw_out4.2 pw_out4.1 pw_out4.0 pwm_ls d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw fsel_ls1 pw_ls1.6 pw_ls1.5 pw_ls1.4 pw_ls1.3 pw_ls1.2 pw_ls1.1 pw_ls1.0 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw fsel_ls2 pw_ls2.6 pw_ls2.5 pw_ls2.4 pw_ls2.3 pw_ls2.2 pw_ls2.1 pw_ls2.0 status_0 d15 d14 d13 d12 d11 d10 d9 d8 r r r r/rc r/rc r/rc r/rc r/rc opmod.1 opmod.0 cold_start wu_tim wu_lin wu_can wu_wu3 wu_wu2 d7 d6 d5 d4 d3 d2 d1 d0 r/rc r r r r r/rc r/rc r/rc wu_wu1 wd_cnt.3 wd_cnt.2 wd_cnt.1 wd_cnt.0 vr1_res.2 vr1_res.1 vr1_res.0
NCV7462 http://onsemi.com 44 status_1 d15 d14 d13 d12 d11 d10 d9 d8 n/a r r r r/rc r r/rc r/rc reserved wu3 wu2 wu1 vcan_fail vcan_uv vr1_fail vr2_fail d7 d6 d5 d4 d3 d2 d1 d0 r/rc r/rc r/rc r/rc r/rc r/rc r/rc r/rc vr2_short vs_ov vs_uv tsd2 tsd1 twar to_txdl to_txdc status_2 d15 d14 d13 d12 d11 d10 d9 d8 n/a n/a r r r/rc r/rc r/rc r/rc reserved reserved wd_status.1 wd_status.0 ls2_oc ls1_oc out_hs_oc out4_oc d7 d6 d5 d4 d3 d2 d1 d0 r/rc r/rc r/rc r/rc r/rc r/rc r/rc r/rc out3_oc out2_oc out1_oc out_hs_ul out4_ul out3_ul out2_ul out1_ul
NCV7462 http://onsemi.com 45 spi registers details control_0 control_0 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw mod_stby mod_sleep wd_trig wd_per.1 wd_per.0 icmp_stby vr2_on.1 vr2_on.0 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw vr1_res.1 vr1_res.0 can_dis can_lsto lin_slope txdl_to.1 txdl_to.0 fso_dis mode control mod_stby mod_sleep 0 0 default normal mode 0 1 go to sleep mode 1 0 go to standby mode 1 1 go to sleep mode (dominant) watchdog trigger bit wd_trig 0 watchdog trigger set to 0 1 watchdog trigger set to 1 watchdog trigger time wd_per.1 wd_per.0 configuration of the watchdog trigger time 0 0 default trigger time = 9.75 ms 0 1 trigger time = 39 ms 1 0 trigger time = 97.5 ms 1 1 trigger time = 195 ms standby vr1 comparator icmp_stby enables the vr1 current comparator 0 default comparator is enabled 1 comparator is disabled vr2 control vr2_on.1 vr2_on.0 vr2 behavior in different modes 0 0 default vr2 is off in all modes 0 1 vr2 is on in normal mode; off in standby and sleep modes 1 0 vr2 is on in normal and standby mode; off in sleep mode 1 1 vr2 is on in all modes vr1 reset level vr1_res.1 vr1_res.0 adjustment of the vr1 reset level 0 0 default set the reset threshold to typ. 4.5 v (91%) 0 1 set the reset threshold to typ. 4.3 v (87%) 1 0 set the reset threshold to typ. 3.9 v (79%) 1 1 set the reset threshold to typ. 3.7 v (74%)
NCV7462 http://onsemi.com 46 can transceiver control can_dis can_lsto can transceiver in normal mode 0 0 default can transmitter and receiver enabled 0 1 can listen only (transmitter will not react to txdc signal) 1 x can transceiver disabled lin slope control lin_slope change of the lin slope 0 default high slew rate (as per lin specification) 1 low slew rate txdl time ? out timer txdl_to.1 txdl_to.0 dominant txd time ? out configuration of the lin interface 0 0 default set the timer to typ. 55 ms 0 1 set the timer to typ. 13 ms 1 x time ? out timer disabled fso function disable fso_dis out3/fso function 0 default out3 pin is driven by internal fso signal 1 out3 pins is a general ? purpose high ? side driver control_1 control_1 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw wu_can_dis wu_lin_dis wu_tim_en.1 wu_tim_en.0 wu3_dis wu2_dis wu1_dis wu3_pud d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw wu2_pud wu1_pud wu3_t.1 wu3_t.0 wu2_t.1 wu2_t.0 wu1_t.1 wu1_t.0 can wakeup disable wu_can_dis enables can wakeup in standby or sleep mode 0 default can wakeup enabled 1 can wakeup disabled lin wakeup disable wu_lin_dis enables lin wakeup in standby or sleep mode 0 default lin wakeup enabled 1 lin wakeup disabled timer wakeup control wu_tim_en.[1:0] enables cyclic (timer controlled) wakeup from standby or sleep mode 0 0 default timers 1/2 are not used as wakeup sources 0 1 wakeup generated based on timer 1 1 0 wakeup generated based on timer 2 1 1 wakeup generated based on timer 1
NCV7462 http://onsemi.com 47 wux wakeup disable wu3_dis wu2_dis wu1_dis wux configuration 0 0 0 default all wake ? up inputs are enabled x x 1 input wu1 is disabled as wake ? up x 1 x input wu2 is disabled as wake ? up 1 x x input wu3 is disabled as wake ? up wux sink/source wu3_pud wu2_pud wu1_pud wux sink/source configuration 0 0 0 default default: all wux configured as current sink in all modes x x 1 wu1 configured as current source in normal mode x 1 x wu2 configured as current source in normal mode 1 x x wu3 configured as current source in normal mode wux filter time wux_t.1 wux_t.0 defines the filter configuration for wake ? ups wu1 ? 3 0 0 default default: filter with 64 s filter time (static sense) 0 1 enables filter after 80 s with a filter time of 16 s (cyclic sensing); timer2 1 0 enables filter after 800 s with a filter time of 16 s (cyclic sens- ing); timer2 1 1 enables filter after 800 s with a filter time of 16 s (cyclic sens- ing); timer1 control_2 control_2 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw reserved reserved reserved reserved reserved reserved reserved reserved d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw t2_tper.1 t2_tper.0 t2_ton.1 t2_ton.0 t1_tper.2 t1_tper.1 t1_tper.0 t1_ton timer2 period t2_tper.1 t2_tper.0 defines the period of the cyclic sense timer2 0 0 default period: 200 ms 0 1 period: 50 ms 1 0 period: 20 ms 1 1 period: 10 ms timer2 on ? time t2_ton.1 t2_ton.0 defines the on time for the cyclic sense timer2 0 0 default on time 100 s 0 1 on time 200 s 1 0 on time 1 ms 1 1 reserved ? if used, will be equal to the default value of 100 s
NCV7462 http://onsemi.com 48 timer1 period t1_tper.2 t1_tper.1 t1_tper.0 defines the period of the cyclic sense timer1 0 0 0 default period: 0.5 s 0 0 1 period: 1.0 s 0 1 0 period: 1.5 s 0 1 1 period: 2.0 s 1 0 0 period: 2.5 s 1 0 1 period: 3.0 s 1 1 0 period: 3.5 s 1 1 1 period: 4.0 s timer1 on ? time t1_ton defines the on time for the cyclic sense timer1 0 default on time 10 ms 1 on time 20 ms control_3 control_3 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw reserved reserved reserved reserved reserved reserved reserved reserved d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw vs_lockout _dis ls_ovuv ls2_on.1 ls2_on.0 ls1_on.1 ls1_on.0 inh_off out_hs_ocr vs uv/ov lockout vs_lockout_dis disables the automatic vs lockout 0 default outputs will be reactivated only when the vs uv/ov flag is cleared 1 outputs will be reactivated when vs uv/ov condition disappears lsx active in vs uv/ ov ls_ovuv enables lsx in case of vs ov/uv 0 default disabled ? lsx will be disabled in case of vs uv/ov 1 enabled ? lsx will remain in their previous state in case of vs uv/ov lsx driver control lsx_on.1 lsx_on.0 defines the configuration of the low ? side ls1/2 0 0 default driver is off in all modes 0 1 driver is on in normal mode (off in standby/sleep mode) 1 0 driver is controlled by its pwm setting in normal mode 1 1 reserved ? if used, lsx will be off in all modes (equal to default) inhibit output inh_off lin pull ? up for master or control output for external voltage regulator 0 default inh output active in normal mode 1 inh output off (master resistor disabled)
NCV7462 http://onsemi.com 49 overcurrent recovery out_hs out_hs_ocr enables overcurrent recovery mode at out_hs 0 default overcurrent recovery disabled 1 overcurrent recovery enabled control_4 control_4 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw out1_lowr out4_on.2 out4_on.1 out4_on.0 out3_on.2 out3_on.1 out3_on.0 out2_on.2 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw out2_on.1 out2_on.0 out1_on.2 out1_on.1 out1_on.0 out_hs_on.2 out_hs_on.1 out_hs_on.0 out1 switch strength out1_lowr enables stronger switch on out1 output 0 default ?normal ohmic? configuration: typical 7 ohm ron; parameters equal to out2 ? 4 1 ?low ohmic? configuration: typical 2 ohm ron; higher underload threshold; higher current limitation hs driver control out_hs_on.[2:0] defines the configuration of the high ? side out_hs outx_on.[2:0] defines the configuration of the high ? side out1..4 0 0 0 default driver is off in all modes 0 0 1 driver is on in normal, standby and sleep mode 0 1 0 driver is cyclic on with the timing of timer1 in normal, standby and sleep mode 0 1 1 driver is cyclic on with the timing of timer2 in normal, standby and sleep mode 1 0 0 driver is controlled by the corresponding pwm unit in normal, cyclic ? sense standby / sleep mode 1 0 1 reserved ? if used, the driver is off in all modes (equal to default) 1 1 0 reserved ? if used, the driver is off in all modes (equal to default) 1 1 1 reserved ? if used, the driver is off in all modes (equal to default) pwm_hs pwm _hs d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw reserved reserved reserved reserved reserved reserved reserved reserved d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw fsel_hs pw_hs.6 pw_hs.5 pw_hs.4 pw_hs.3 pw_hs.2 pw_hs.1 pw_hs.0
NCV7462 http://onsemi.com 50 pwm_out1/2 pwm_out1/2 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw fsel_out1 pw_out1.6 pw_out1.5 pw_out1.4 pw_out1.3 pw_out1.2 pw_out1.1 pw_out1.0 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw fsel_out2 pw_out2.6 pw_out2.5 pw_out2.4 pw_out2.3 pw_out2.2 pw_out2.1 pw_out2.0 pwm_out3/4 pwm_out3/4 d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw fsel_out3 pw_out3.6 pw_out3.5 pw_out3.4 pw_out3.3 pw_out3.2 pw_out3.1 pw_out3.0 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw fsel_out4 pw_out4.6 pw_out4.5 pw_out4.4 pw_out4.3 pw_out4.2 pw_out4.1 pw_out4.0 pwm_ls pwm_ls d15 d14 d13 d12 d11 d10 d9 d8 rw rw rw rw rw rw rw rw fsel_ls1 pw_ls1.6 pw_ls1.5 pw_ls1.4 pw_ls1.3 pw_ls1.2 pw_ls1.1 pw_ls1.0 d7 d6 d5 d4 d3 d2 d1 d0 rw rw rw rw rw rw rw rw fsel_ls2 pw_ls2.6 pw_ls2.5 pw_ls2.4 pw_ls2.3 pw_ls2.2 pw_ls2.1 pw_ls2.0 pwm frequency fsel_hs fsel_outx fsel_lsx pwm frequency selector 0 default base frequency of pwm on the corresponding output f(pwm) = 150 hz 1 base frequency of pwm on the corresponding output f(pwm) = 200 hz output duty cycle pw_hs[6:0] pw_outx[6:0] pw_lsx[6:0] duty cycle selector 0 default corresponding output is active with duty cycle 1 / 128 1 .. $7f corresponding output is active with duty cycle (pw_xxx[6:0] + 1) / 128 status_0 status_0 d15 d14 d13 d12 d11 d10 d9 d8 r r r r/rc r/rc r/rc r/rc r/rc opmod.1 opmod.0 cold_start wu_tim wu_lin wu_can wu_wu3 wu_wu2 d7 d6 d5 d4 d3 d2 d1 d0 r/rc r r r r r/rc r/rc r/rc wu_wu1 wd_cnt.3 wd_cnt.2 wd_cnt.1 wd_cnt.0 vr1_res.2 vr1_res.1 vr1_res.0
NCV7462 http://onsemi.com 51 operating mode opmod.1 opmod.0 operating mode 0 0 standby 0 1 normal 1 0 flash 1 1 reserved ? will not be used cold start cold_start power on reset status 0 cold start (=vs connection) not occurred 1 cold start (=vs connection) occurred ? cleared after first successful access of the register wake ? up source recognition wu_tim wu_lin wu_can remote wake ? up source 0 0 0 no timer, can nor lin wakeup occurred x x 1 can wake ? up occurred x 1 x lin wake ? up occurred 1 x x timer wakeup occurred wake ? up source recognition wu_wux local wake ? up source (wux pins) 0 no wux pin wake ? up occurred 1 wux pin wake ? up occured watchdog failure counter wd_cnt.[3:0] number of watchdog failures 0 default no watchdog failure encountered $1 .. $f non ? zero number of watchdog failures encountered vr1 restart counter vr1_res.[2:0] number of unsuccessful restarts of vr1 after thermal shutdown 0 default no unsuccessful vr1 restart encountered $1 .. $7 non ? zero number of unsuccessful vr1 restarts encountered status_1 status_1 d15 d14 d13 d12 d11 d10 d9 d8 n/a r r r r/rc r r/rc r/rc reserved wu3 wu2 wu1 vcan_fail vcan_uv vr1_fail vr2_fail d7 d6 d5 d4 d3 d2 d1 d0 r/rc r/rc r/rc r/rc r/rc r/rc r/rc r/rc vr2_short vs_ov vs_uv tsd2 tsd1 twar to_txdl to_txdc status of wux inputs wux status of wux input 0 wux is low 1 wux is high
NCV7462 http://onsemi.com 52 vcan failure vcan_fail vcc_can supply input failure 0 default no vcc_can failure occurred 1 vcc_can fails for at least 2 s (vcc_can < vfail_vcan for > 2 s), latched bit vcan undervoltage vcan_uv vcc_can supply input undervoltage 0 default no vcc_can failure occurred 1 vcc_can < vfail_vcan vr1 failure vr1_fail voltage regulator vr1 failure 0 default no vr1 failure occurred 1 vr1 fails for at least 5 s (vr1 < 2 v for > 5 s) or (vr1 < 2 v at 4 ms after turn ? on) vr2 failure vr2_fail voltage regulator vr2 failure 0 default no vr2 failure occurred 1 vr2 fails for at least 2 s (vr2 < 2 v for > 2 s) or (vr2 < 2 v at 4 ms after turn ? on) vr2 short circuit vr2_short indicates a short circuit at vr2 0 default no short circuit 1 vr2 short to gnd at turn on; (vr2 < 2 v for more than 4 ms) vs overvoltage vs_ov overvoltage on vs pin 0 default vs is below the overvoltage limit 1 vs exceeded the overvoltage limit vs undervoltage vs_uv undervoltage on vs pin 0 default vs is above the undervoltage limit 1 vs fell below the undervoltage limit thermal protection tsd2 tsd1 twar thermal warning/shutdown 0 0 0 default no thermal limit exceeded x x 1 thermal warning encountered x 1 x thermal shutdown 1 encountered 1 x x thermal shutdown 2 encountered permanent dominant protection to_txdl to_txdc 0 0 default no transmitter timeout encountered 1 x lin transmitter timeout encountered x 1 can transmitter timeout encountered
NCV7462 http://onsemi.com 53 status_2 status_2 d15 d14 d13 d12 d11 d10 d9 d8 n/a n/a r r r/rc r/rc r/rc r/rc reserved reserved wd_status.1 wd_status.0 ls2_oc ls1_oc out_hs_oc out4_oc d7 d6 d5 d4 d3 d2 d1 d0 r/rc r/rc r/rc r/rc r/rc r/rc r/rc r/rc out3_oc out2_oc out1_oc out_hs_ul out4_ul out3_ul out2_ul out1_ul watchdog counter status wd_status.[1:0] watchdog counter status 0 0 watchdog counter below 33% of acceptable interval* 0 1 watchdog counter above 33% and below 66% of acceptable interval* 1 0 reserved ? will not be used 1 1 watchdog counter above 66% of acceptable interval* * acceptable interval means timeout or open window interval driver overcurrent lsx_oc out_hs_oc out_x_oc overcurrent status of the corresponding output 0 default no overcurrent encountered 1 overcurrent encountered driver underload out_hs_ul out_x_ul underload status of the corresponding output 0 default no underload encountered 1 underload encountered
NCV7462 http://onsemi.com 54 device ordering information part number package type shipping ? NCV7462dq0r2g ssop36 ? ep (pb ? free) 1500 / tape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d.
NCV7462 http://onsemi.com 55 package dimensions case 940ab ? 01 issue o dim min max millimeters e2 3.90 4.10 a 2.65 a1 --- 0.10 l 0.50 0.90 e 0.50 bsc c 0.23 0.32 h 0.25 0.75 b 0.18 0.36 d2 5.70 5.90 l2 0.25 bsc m 0 8 notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. dimension b does not include dambar protrusion. allowable dambar protrusion shall be 0.13 total in excess of the b dimension at mmc. 4. dimension b shall be measured between 0.10 and 0.25 from the tip. 5. dimensions d and e1 do not include mold flash, protrusions or gate burrs. dimensions d and e1 shall be determined at datum h. 6. this chamfer feature is optional. if it is not present, a pin one identifier must be loacated within the indic- ated area. pin 1 reference d e1 0.10 seating plane 36x b e e detail a --- soldering footprint* l l2 gauge detail a e/2 detail b a2 2.35 2.60 e1 7.50 bsc plane seating plane c x c h end view a m 0.25 b t top view side view a-b 0.20 c 118 19 36 a b d detail b 36x a1 a2 c c d2 e2 bottom view 36x d 10.30 bsc e 10.30 bsc m1 5 15 5.90 36x 1.06 36x 0.36 0.50 dimensions: millimeters pitch 4.10 10.76 1 0.25 c s s 4x h a x = a or b h note 6 m1 m 36x *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d.
NCV7462 http://onsemi.com 56 on semiconductor and are registered trademarks of semiconductor co mponents industries, llc (scillc). scillc owns the rights to a numb er of patents, trademarks, copyrights, trade secrets, and other intellectual property. a list ing of scillc?s product/patent coverage may be accessed at ww w.onsemi.com/site/pdf/patent ? marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and s pecifically disclaims any and all liability, including without limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/ or specifications can and do vary in different applications and actual performance may vary over time. all operating parame ters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the right s of others. scillc products are not designed, intended, or a uthorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in whic h the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or us e scillc products for any such unintended or unauthorized appli cation, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unin tended or unauthorized use, even if such claim alleges that scil lc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyrig ht laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5817 ? 1050 NCV7462/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative

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