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september 2005 asm5p2304b rev 0.5 alliance semiconductor 2575 augustine drive ? santa clara, ca ? tel: 408.855.4900 ? fax: 408.855.4999 ? www.alsc.com notice: the information in this document is subject to change without notice. 3.3v zero delay buffer features ? zero input - output propagation delay, adjustable by capacitive load on fbk input. ? multiple configurations - refer ?asm5p2304b configurations table?. ? input frequency range: 4mhz to 20mhz ? multiple low-skew outputs. ? output-output skew less than 200ps. ? device-device skew less than 500ps. ? two banks of four outputs. ? less than 200ps cycle-to-cycle jitter (-1, -1h, -2, -2h). ? available in space saving, 8-pin 150 mil soic package. ? 3.3v operation. ? advanced 0.35 cmos technology. ? industrial temperature available . functional description asm5p2304b is a versatile, 3.3v zero-delay buffer designed to distribute hi gh-speed clocks in pc, workstation, datacom, tele com and other high-performance applications. it is available in an 8 pin package. the part has an on-chip pll, which locks to an input clock, presented on the ref pin. the pll feedback is required to be driven to fbk pin, and can be obtained from one of the outputs. the input-to-out put propagation delay is guaranteed to be less than 250ps , and the output-to-output skew is guaranteed to be less than 200ps. the asm5p2304b has two bank s of two outputs each. multiple asm5p2304b devices can accept the same input clock and distribute it. in this case the skew between the outputs of the two devices is guaranteed to be less than 500ps. the asm5p2304b is available in two different configurations (refer ?asm5p 2304b configurations table). the asm5p2304b-1 is the base part, where the output frequencies equal the reference if there is no counter in the feedback path. the asm5p2304b-1h is the high-drive version of the -1 and the rise and fall times on this device are much faster. the asm5p2304b-2 allows the user to obtain ref and 1/2x or 2x frequencies on each output bank. the exact configuration and output frequencies depend on which output driv es the feedback pin. block diagram /2 pll clka1 fbk clka2 clkb1 clkb2 ref extra divider (-2)
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 2 of 13 notice: the information in this document is subject to change without notice. asm5p2304b configurations device feedback from bank a frequency bank b frequency asm5p2304b-1 bank a or bank b reference reference asm5p2304b-1h bank a or bank b reference reference asm5p2304b-2 bank a reference reference /2 asm5p2304b-2 bank b 2 x reference reference asm5p2304b-2h bank a reference reference /2 asm5p2304b-2h bank b 2 x reference reference zero delay and skew control for applications requiring zero input-output delay, all outputs must be equally loaded. to close the feedback loop of the asm5p2304b, the fbk pin can be driven from any of t he four available output pins. the output driving the fbk pin will be driving a total load of 7pf plus any additional load that it drives. the relative loading of this output (with respect to the remaining outputs) can adjust the input out put delay. this is shown in the above graph. for applicat ions requiring zero input- output delay, all outputs including the one providing feedback should be equally loaded. if input-output delay adjustments are required, use the above graph to calculate loading differences between the feedback output and remaining outputs. for zero output-output skew, be sure to load outputs equally. -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 0 -500 -1000 -1500 500 1000 1500 output load difference: fbk load - clka/clkb load (pf) ref-input to clka/clkb delay (ps) ref input to clka/clkb delay vs difference in loading between fbk pin and clka/clkb pins
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 3 of 13 notice: the information in this document is subject to change without notice. clkb1 1 2 3 4 5 6 7 8 a sm5p2304b ref clka1 clka2 gnd clkb2 v dd fbk pin configuration pin description for asm5p2304b pin # pin name description 1 ref 1 input reference frequency, 5v tolerant input 2 clka1 2 buffered clock output, bank a 3 clka2 2 buffered clock output, bank a 4 gnd ground 5 clkb1 2 buffered clock output, bank b 6 clkb2 2 buffered clock output, bank b 7 v dd 3.3v supply 8 fbk pll feedback input notes: 1. weak pull-down. 2. weak pull-down on all outputs.
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 4 of 13 notice: the information in this document is subject to change without notice. absolute maximum ratings parameter min max unit supply voltage to ground potential -0.5 +7.0 v dc input voltage (except ref) -0.5 v dd + 0.5 v dc input voltage (ref) -0.5 7 v storage temperature -65 +150 c max. soldering temperature (10 sec) 260 c junction temperature 150 c static discharge voltage (as per jedec std22- a114-b) 2000 v note: these are stress ratings only and functional usage is not im plied. exposure to absolute maximum ratings for prolonged pe riods can affect device reliability. operating conditions for asm5p2304b commercial temperature devices parameter description min max unit v dd supply voltage 3.0 3.6 v t a operating temperature (amb ient temperature) 0 70 c c l load capacitance, from 4mhz to 20mhz 30 pf c in input capacitance 3 7 pf electrical characteristics for asm5p2304b commercial temperature devices parameter description test conditions min max unit v il input low voltage 0.8 v v ih input high voltage 2.0 v i il input low current v in = 0v 50.0 a i ih input high current v in = v dd 100.0 a v ol output low voltage 4 i ol = 8ma (-1, -2) i oh = 12ma (-1h, -2h) 0.4 v v oh output high voltage 4 i ol = -8ma (-1, -2) i oh = -12ma (-1h, -2h) 2.4 v i dd supply current unloaded outputs, 20mhz ref (-1,-1h, -2,-2h) 10 ma note: 3. applies to both ref clock and fbk. 4. parameter is guaranteed by design and charac terization. not 100% tested in production.
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 5 of 13 notice: the information in this document is subject to change without notice. switching characteristics for asm5p2304b commercial temperature devices parameter description test conditions min typ max unit 1/t 1 output frequency 30pf load, -1,-1h,-2, -2h devices 4 20 mhz duty cycle 5 = (t 2 / t 1 ) * 100 (-1, -2, -1h, -2h) measured at 1.4v, f out = 20mhz 30pf load 40.0 50.0 60.0 % duty cycle 5 = (t 2 / t 1 ) * 100 (-1, -2,-1h, -2h) measured at 1.4v, f out = <20mhz 15pf load 45.0 50.0 55.0 % t 3 output rise time 5 (-1, -2) measured between 0.8v and 2.0v 30pf load 2.20 ns t 3 output rise time 5 (-1, -2) measured between 0.8v and 2.0v 15pf load 1.50 ns t 3 output rise time 5 (-1h, -2h) measured between 0.8v and 2.0v 30pf load 1.50 ns t 4 output fall time 5 (-1, -2) measured between 2.0v and 0.8v 30pf load 2.20 ns t 4 output fall time 5 (-1, -2) measured between 2.0v and 0.8v 15pf load 1.50 ns t 4 output fall time 5 (-1h, -2h) measured between 2.0v and 0.8v 30pf load 1.25 ns output-to-output skew on same bank (-1, -2) all outputs equally loaded 200 output-to-output skew (-1h, -2h) all outputs equally loaded 200 output bank a -to- output bank b skew (-1, -2h) all outputs equally loaded 200 t 5 output bank a to output bank b skew (-2) all outputs equally loaded 400 ps t 6 delay, ref rising edge to fbk rising edge 5 measured at v dd /2 0 250 ps t 7 device-to-device skew 5 measured at v dd /2 on the fbk pins of the device 0 500 ps t 8 output slew rate 5 measured between 0.8v and 2.0v using test circuit #2 1 v/ns measured at 20mhz, loaded outputs, 15pf load 175 measured at 20mhz, loaded outputs, 30pf load 200 t j cycle-to-cycle jitter 5 (-1, -1h, -2h) measured at 20mhz, loaded outputs, 15pf load 100 ps measured at 20mhz, loaded outputs, 30pf load 400 t j cycle-to-cycle jitter 5 (-2) measured at 20mhz, loaded outputs, 15pf load 375 ps t lock pll lock time 5 stable power supply, valid clock presented on ref and fbk pins 1.0 ms note: 5. parameter is guaranteed by design and charac terization. not 100% tested in production .
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 6 of 13 notice: the information in this document is subject to change without notice. operating conditions for ASM5I2304B industrial temperature devices parameter description min max unit v dd supply voltage 3.0 3.6 v t a operating temperature (ambi ent temperature) -40 85 c c l load capacitance, from 4mhz to 20mhz 30 pf c in input capacitance 6 7 pf note: 6. applies to both ref clock and fbk. electrical characteristics for asm5i 2304b industrial temperature devices parameter description test conditions min max unit v il input low voltage 0.8 v v ih input high voltage 2.0 v i il input low current v in = 0v 50.0 a i ih input high current v in = v dd 100.0 a v ol output low voltage 7 i ol = 8ma (-1, -2) i oh = 12ma (-1h, -2h) 0.4 v v oh output high voltage 7 i ol = -8ma (-1, -2) i oh = -12ma (-1h, -2h) 2.4 v i dd supply current unloaded outputs, 20mhz ref (-1, -1h, -2, -2h) 10 ma note: 7. parameter is guaranteed by design and charac terization. not 100% tested in production .
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 7 of 13 notice: the information in this document is subject to change without notice. switching characteristics for ASM5I2304B industrial temperature devices all parameters are specified with loaded outputs parameter description test conditions min typ max unit t 1 output frequency 30pf load,-1, -1h,-2, -2h devices 4 20 mhz duty cycle 8 = (t 2 / t 1 ) * 100 (-1, -2, -1h, -2h) measured at 1.4v, f out = <20mhz 30pf load 40.0 50.0 60.0 % duty cycle 8 = (t 2 / t 1 ) * 100 (-1, -2, -1h, -2h) measured at 1.4v, f out = <20mhz 15pf load 45.0 50.0 55.0 % t 3 output rise time 8 (-1, -2) measured between 0.8v and 2.0v 30pf load 2.50 ns t 3 output rise time 8 (-1, -2) measured between 0.8v and 2.0v 15pf load 1.50 ns t 3 output rise time 8 (-1h, -2h) measured between 0.8v and 2.0v 30pf load 1.50 ns t 4 output fall time 8 (-1, -2) measured between 2.0v and 0.8v 30pf load 2.50 ns t 4 output fall time 8 (-1, -2) measured between 2.0v and 0.8v 15pf load 1.50 ns t 4 output fall time 8 (-1h, -2h) measured between 2.0v and 0.8v 30pf load 1.25 ns output-to-output skew on same bank (-1, -2) 8 all outputs equally loaded 200 output-to-output skew (-1h, -2h) all outputs equally loaded 200 output bank a -to- output bank b skew (-1, -2h) all outputs equally loaded 200 t 5 output bank a -to- output bank b skew (-2) all outputs equally loaded 400 ps t 6 delay, ref rising edge to fbk rising edge 8 measured at v dd /2 0 250 ps t 7 device-to-device skew 8 measured at v dd /2 on the fbk pins of the device 0 500 ps t 8 output slew rate 8 measured between 0.8v and 2.0v using test circuit #2 1 v/ns measured at 20mhz, loaded outputs, 15pf load 180 measured at 20mhz, loaded outputs, 30pf load 200 t j cycle-to-cycle jitter 8 (-1, -1h, -2h) measured at 20mhz, loaded outputs, 15pf load 100 ps measured at 20mhz, loaded outputs, 30pf load 400 t j cycle-to-cycle jitter 8 (-2) measured at 20mhz, loaded outputs, 15pf load 380 ps t lock pll lock time 8 stable power supply, valid clock presented on ref and fbk pins 1.0 ms note: 8. parameter is guaranteed by design and charac terization. not 100% tested in production .
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 8 of 13 notice: the information in this document is subject to change without notice. switching waveforms duty cycle timing all outputs rise/fall time output - output skew input - output propagation delay device - device skew t 1 2 1.4 v 1.4 v 1.4 v t 2.0 v 0.8 v t 3 t 4 2.0 v 0.8 v 1.4 v 1.4 v t 5 output output v dd /2 t 6 input output v dd /2 v dd /2 t 7 clkout, device 1 v dd /2 clkout, device 2 3.3 v 0 v output
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 9 of 13 notice: the information in this document is subject to change without notice. test circuits v dd v dd gnd gnd clkout cload outputs test circuit # 1 0.1uf 0.1uf v dd v dd gnd gnd 10pf outputs test circuit # 2 0.1uf 0.1uf 1k ? 1k ? for parameter t 8 (output skew rate) on -1h devices
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 10 of 13 notice: the information in this document is subject to change without notice. package information 8-lead (150-mil) soic package d e h d a1 a2 a l c b e dimensions inches millimeters symbol min max min max a1 0.004 0.010 0.10 0.25 a 0.053 0.069 1.35 1.75 a2 0.049 0.059 1.25 1.50 b 0.012 0.020 0.31 0.51 c 0.007 0.010 0.18 0.25 d 0.193 bsc 4.90 bsc e 0.154 bsc 3.91 bsc e 0.050 bsc 1.27 bsc h 0.236 bsc 6.00 bsc l 0.016 0.050 0.41 1.27 0 8 0 8
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 11 of 13 notice: the information in this document is subject to change without notice. ordering codes ordering code marking package type operating range asm5p2304b-1-08-sr 5p2304b-1 8-pin 150-mil soic-tape & reel commercial asm5p2304b-1-08-st 5p2304b-1 8-pin 150-mil soic-tube commercial ASM5I2304B-1-08-sr 5i2304b-1 8-pin 150-mil soic-tape & reel industrial ASM5I2304B-1-08-st 5i2304b-1 8- pin 150-mil soic-tube industrial asm5p2304b-1h-08-sr 5p2304b-1h 8-pin 150-mil soic-tape & reel commercial asm5p2304b-1h-08-st 5p2304b-1h 8-pin 150-mil soic-tube commercial ASM5I2304B-1h-08-sr 5i2304b-1h 8-pin 150-mil soic-tape & reel industrial ASM5I2304B-1h-08-st 5i2304b-1h 8- pin 150-mil soic-tube industrial asm5p2304b-2-08-sr 5p2304b-2 8-pin 150-mil soic-tape & reel commercial asm5p2304b-2-08-st 5p2304b-2 8-pin 150-mil soic-tube commercial ASM5I2304B-2-08-sr 5i2304b-2 8-pin 150-mil soic-tape & reel industrial ASM5I2304B-2-08-st 5i2304b-2 8- pin 150-mil soic-tube industrial asm5p2304b-2h-08-sr 5p2304b-2h 8-pin 150-mil soic-tape & reel commercial asm5p2304b-2h-08-st 5p2304b-2h 8-pin 150-mil soic-tube commercial ASM5I2304B-2h-08-sr 5i2304b-2h 8-pin 150-mil soic-tape & reel industrial ASM5I2304B-2h-08-st 5i2304b-2h 8- pin 150-mil soic-tube industrial asm5p2304bf-1-08-sr 5p2304bf-1 8-pin 150-mil soic-tape & reel, pb free commercial asm5p2304bf-1-08-st 5p2304bf-1 8-pin 150-mil soic-tube, pb free commercial ASM5I2304Bf-1-08-sr 5i2304bf- 1 8-pin 150-mil soic-tape & reel, pb free industrial ASM5I2304Bf-1-08-st 5i2304bf-1 8-pin 150- mil soic-tube, pb free industrial asm5p2304bf-1h-08-sr 5p2304bf-1h 8-pin 150-mil soic-tape & reel, pb free commercial asm5p2304bf-1h-08-st 5p2304bf-1h 8-pin 150-mil soic-tube, pb free commercial ASM5I2304Bf-1h-08-sr 5i2304b f-1h 8-pin 150-mil soic-tape & reel, pb free industrial ASM5I2304Bf-1h-08-st 5i2304bf-1h 8-pin 150-mil soic-tube, pb free industrial asm5p2304bf-2-08-sr 5p2304bf-2 8-pin 150-mil soic-tape & reel, pb free commercial asm5p2304bf-2-08-st 5p2304bf-2 8-pin 150-mil soic-tube, pb free commercial ASM5I2304Bf-2-08-sr 5i2304bf- 2 8-pin 150-mil soic-tape & reel, pb free industrial ASM5I2304Bf-2-08-st 5i2304bf-2 8-pin 150- mil soic-tube, pb free industrial asm5p2304bf-2h-08-sr 5p2304bf-2h 8-pin 150-mil soic-tape & reel, pb free commercial asm5p2304bf-2h-08-st 5p2304bf-2h 8-pin 150-mil soic-tube, pb free commercial ASM5I2304Bf-2h-08-sr 5i2304b f-2h 8-pin 150-mil soic-tape & reel, pb free industrial ASM5I2304Bf-2h-08-st 5i2304bf-2h 8-pin 150-mil soic-tube, pb free industrial asm5p2304bg-1-08-sr 5p2304bg-1 8-pin 150-mil soic-tape & reel, green commercial asm5p2304bg-1-08-st 5p2304bg-1 8-pin 150-mil soic-tube, green commercial ASM5I2304Bg-1-08-sr 5i2304b g-1 8-pin 150-mil soic-tape & reel, green industrial ASM5I2304Bg-1-08-st 5i2304bg-1 8-pin 150-mil soic-tube, green industrial
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 12 of 13 notice: the information in this document is subject to change without notice. ordering codes (cont?d) ordering code marking package type operating range asm5p2304bg-1h-08-sr 5p2304bg-1h 8-pin 150-mil soic-tape & reel, green commercial asm5p2304bg-1h-08-st 5p2304bg-1h 8-pi n 150-mil soic-tube, green commercial ASM5I2304Bg-1h-08-sr 5i2304bg-1h 8-pi n 150-mil soic-tape & reel industrial ASM5I2304Bg-1h-08-st 5i2304bg-1h 8-pi n 150-mil soic-tube, green industrial asm5p2304bg-2-08-sr 5p2304bg-2 8-pin 150-mil soic-tape & reel, green commercial asm5p2304bg-2-08-st 5p2304bg-2 8-pin 150-mil soic-tube, green commercial ASM5I2304Bg-2-08-sr 5i2304b g-2 8-pin 150-mil soic-tape & reel, green industrial ASM5I2304Bg-2-08-st 5i2304bg-2 8-pin 150-mil soic-tube, green industrial asm5p2304bg-2h-08-sr 5p2304bg-2h 8-pin 150-mil soic-tape & reel, green commercial asm5p2304bg-2h-08-st 5p2304bg-2h 8-pi n 150-mil soic-tube, green commercial ASM5I2304Bg-2h-08-sr 5i2304bg-2h 8-pin 150-mil soic-tape & reel, green industrial ASM5I2304Bg-2h-08-st 5i2304bg-2h 8-pi n 150-mil soic-tube, green industrial device ordering information asm5p2304bf-08-sr licensed under us patent #5,488, 627, #6,646,463 and #5,631,920. o = sot u = msop s = soic e = tqfp t = tssop l = lqfp a = ssop u = msop v = tvsop p = pdip b = bga d = qsop q = q fn x = sc-70 device pin count x= automotive i= industrial p or n/c = commercial (-40c to +125c) (-40c to +85c) (0c to +70c) 1 = reserved 6 = power management 2 = non pll based 7 = power management 3 = emi reduction 8 = power management 4 = ddr support products 9 = hi performance 5 = s td z e r o d e l ay b u ff er 0 = r ese rv ed alliance semiconductor mixed signal product part number f = lead free and rohs compliant part g = green package r = tape & reel, t = tube or tray
september 2005 asm5p2304b rev 0.5 3.3v zero delay buffer 13 of 13 notice: the information in this document is subject to change without notice. ? copyright 2003 alliance semiconductor corporation. all rights reserved. our three-point logo, our name and intelliwatt are trademarks or registered trademarks of alliance. all other brand and product names may be the trademarks of their respective companies. alliance reserves the right to make ch anges to this document and its products at any time without notice. alliance assumes no responsibility for any errors t hat may appear in this document. the data contained herein represents alliance's best data and/or estimate s at the time of issuance. alliance rese rves the right to change or correct this data at any time, without notice. if the product described herein is under development, significant changes to these specifications are possible. the information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not in tended to operate as, or provide, any guarantee or warrantee to any user or customer. alliance does not assume any responsibility or lia bility arising out of the applic ation or use of any product described herein, and disclaims any express or implied warrant ies related to the sale and/or use of alliance products including liability or warranties related to fitness for a particular purpose, mercha ntability, or infringement of any intellec tual property rights, except as express agreed to in alliance's terms and conditions of sale (which are available from alliance). all sales of alliance products are made exclusively according to alliance's terms and conditions of sale. the purchase of products from alliance does not convey a license under any pa tent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of alli ance or third parties. alliance does not aut horize its products for use as critical components in life-supporting systems where a malfunction or fa ilure may reasonably be expected to result in significant injury to the user, and the inclusion of alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify alliance against all claims arising from such use. alliance semiconductor corporation 2575 augustine drive, santa clara, ca 95054 tel# 408-855-4900 fax: 408-855-4999 www.alsc.com copyright ? alliance semiconductor all rights reserved part number: asm5p2304b document version: 0.5 note: this product utilizes us patent # 6,646,463 im pedance emulator patent issued to alliance semicon

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