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________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 1/11 um4701/4711/8701/8711 multi-line esd/emi protection for color lcd interfaces um4701 dfn8 2.02.0 um4711 dfn8 1.71.3 um8701 dfn16 4.01.6 UM8711 dfn16 3.31.3 general description the um4701/um4711/um8701/UM8711 is a (l-c) low pass filter array with integrated tvs diodes. it is designed to suppress unwanted emi si gnals and provide electrostatic discharge (esd) protection in portable electronic equipment. th is device utilizes solid-state silicon-avalanche technology for superior clamping performance and dc electrical characteristics. they have been optimized for protection of color lcd and camera lines in cellular phones and other portable electronics. the device consists of identical circuits comp rised of tvs diodes for esd protection, and a 5 pole inductor-capacitor network for emi filteri ng. a typical inductor value of 19nh and a capacitor value of 12pf are used to achieve 30db minimum attenuation from 800mhz to 2.7ghz. the tvs diodes provide effective suppression of esd voltages in excess of 15kv (air discharge) and 8kv (contact discharge) per iec 61000-4-2, level 4. the um4701 is in a rohs compliant dfn8 2.02. 0 package, the um4711 is in a rohs compli- ant dfn8 1.71.3 package, the um8701 is in a rohs compliant dfn16 4.01.6 package and the UM8711 is in a rohs compliant dfn16 3.31.3 p ackage. the leads are fi nished with lead-free. the small package makes it ideal for use in por table electronics such as cell phones, digital still cameras, and pdas. applications features z color lcd protection z cell phone ccd camera lines z clamshell cell phones z bidirectional emi filter with integrated tvs for esd protection z esd protection to iec 61000-4-2 (esd) level 4, 15kv (air), 8kv (contact) z filter performance: 30db minimum attenuation from 800mhz to 2.7ghz z tvs working voltage: 5v z inductor: 19nh (typical) z capacitors: 12pf (typical at v r = 2.5v) z protection and filtering for multi lines um4701/4711: four lines um8701/8711: eight lines z solid-state technology ordering information part number working voltage packaging type channel marking code shipping qty um4701 5.0v dfn8 2.02.0 4 abb um4711 5.0v dfn8 1.71.3 4 ar um8701 5.0v dfn16 4.01.6 8 8701 UM8711 5.0v dfn16 3.31.3 8 8711 3000pcs /7inch tape & reel
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 2/11 um4701/4711/8701/8711 pin configurations top view device schematic (4x) m: month code um4701 dfn8 2.02.0 device schematic (4x) m: month code um4711 dfn8 1.71.3 device schematic (8x) xx: week code um8701 dfn16 4.01.6 device schematic (8x) xx: week code UM8711 dfn16 3.31.3
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 3/11 um4701/4711/8701/8711 absolute maximum ratings parameter symbol value unit esd per iec 61000-4-2(air) esd per iec 61000-4-2(contact) v esd +/- 20 +/- 15 kv junction temperature t j 125 c operating temperature range t op -40 to 85 c storage temperature range t stg -55 to 150 c electrical characteristics ( t j =25 unless otherwise noted) parameter symbol conditions min typ max unit tvs reverse stand-off voltage v rwm 5 v tvs reverse breakdown voltage v br it = 1ma 6 8 10 v tvs reverse leakage current i r v rwm = 3.3v 0.1 a dc resistance r cc 18 ? roll-off frequency at -6db attenuation f r zsource = z load = 50 ? 300 mhz filter cut-off frequency fc zsource = z load = 50 ? 150 mhz inductance l 19 nh total series inductance l 1 +l 2 each line 38 nh capacitance cd v r =2.5v,f=1mhz 12 15 pf total capacitance c total input to gnd, each line v r =2.5v,f=1mhz 36 45 pf
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 4/11 um4701/4711/8701/8711 typical operating characteristics typical insertion loss analog crosstalk
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 5/11 um4701/4711/8701/8711 applications information insertion loss insertion loss (il) is used to describe the transm ission coefficient between two points in a circuit often described in terms of db. when examining s parameters, s21 is often described as insertion loss. insertion loss and s21 will be used intercha ngeably from here on out. the insertion loss of a circuit with vout and vin would be expressed as il = s 21 (db) = 20log (v out /v in ) the setup for measuring insertion loss in a 50 ? system is shown in the figure below. it will be analyzed in a 50 ? environment, so the source impedance and load impedance is 50 ? . the transfer functions then can be anal yzed in terms of insertion loss (s21). test conditions: source impedance = 50 ? load impedance = 50 ? input power = 0dbm cut off frequency cut off frequency is the frequency at which the si gnal strength is 3.0 db less than it is pass band 3.0 db of attenuation equates to half the orig inal signal power. the pass band is the range of frequencies that are allowed to ?pass? through a filter with minimal attenuation. for our purposes it starts from dc and ends at the cut off frequency. device connection the um4701/um4711/um8701/UM8711 is comprised of identical circuits consisting of a low pass filter for emi suppression and dual tvs diodes fo r esd protection. the device is in an 8-pin dfn and 16-pin dfn package. electrical connection is made to all the pins located at the bottom of the device. a center tab serves as the ground connection. the device has a flow through design for easy layout. all path lengths should be kept as short as possible to minimize the effects of parasitic inductance in the board traces.
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 6/11 um4701/4711/8701/8711 ground connection recommendation parasitic inductance (l) present in the board la yout will affect the filtering performance of the device. as frequency (f) increases, the effect of the inductance becomes more dominant. this effect is given by equation 1. pin identification 1 - 4 input lines 5 - 8 output lines center tab ground pin identification & configuration um4701/um4711 equation 1: the impedance of an inductor at frequency xlf xlf(l,f ) = 2 f l where: l= inductance (h) f = frequency (hz) pin identification 1 - 8 input lines 9 - 16 output lines center tab ground pin identification & configuration um8701/UM8711 equation 1: the impedance of an inductor at frequency xlf xlf(l, f ) = 2 f l where: l= parasitic inductance in the pcb (h) f = frequency (hz)
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 7/11 um4701/4711/8701/8711 package information um4701: dfn8 2.02.0 outline drawing dimensions millimeters symbol min typ max d 1.95 2.00 2.05 e 1.95 2.00 2.05 d2 1.35 1.50 1.65 a 0.57 0.69 0.80 a1 0 0.02 0.05 a3 - 0.152 0.20 b 0.18 0.25 0.30 e2 0.75 0.90 1.00 l 0.20 0.30 0.40 e - 0.50 - land pattern notes: 1. compound dimension: 2.02.0; 2. unit: mm; 3. general tolerance 0.05mm unless otherwise specified; 4. the layout is just for reference. tape and reel orientation
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 8/11 um4701/4711/8701/8711 um4711: dfn8 1.71.3 outline drawing dimensions millimeters symbol min typ max d 1.624 1.70 1.776 e 1.25 1.30 1.426 d2 1.10 1.40 1.70 e2 0.20 0.30 0.50 a 0.47 0.55 0.60 a1 0 0.02 0.05 a3 - 0.15 - b 0.13 0.20 0.25 l 0.15 0.25 0.35 e - 0.40 - land pattern notes: 1. compound dimension: 1.71.3; 2. unit: mm; 3.general tolerance 0.05mm unless otherwise specified; 4. the layout is just for reference. tape and reel orientation
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 9/11 um4701/4711/8701/8711 um8701: dfn16 4.01.6 outline drawing dimensions millimeters symbol min typ max d 3.90 4.00 4.10 e 1.50 1.60 1.70 d1 3.10 3.20 3.30 c 0.30 0.40 0.50 a 0.545 0.575 0.80 a1 0 0.02 0.05 a2 - 0.13 0.253 b 0.18 0.25 0.30 l 0.25 0.33 0.38 e - 0.50 - land pattern notes: 1. compound dimension: 4.01.6; 2. unit: mm; 3. general tolerance 0.05mm unless otherwise specified; 4. the layout is just for reference. tape and reel orientation
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 10/11 um4701/4711/8701/8711 UM8711: dfn16 3.31.3 outline drawing dimensions millimeters symbol min typ max d 3.224 3.30 3.376 e 1.25 1.30 1.426 d2 2.45 2.90 3.00 e2 0.20 0.30 0.50 a 0.47 0.55 0.60 a1 - 0.02 0.05 a3 - 0.15 - b 0.13 0.20 0.25 l 0.17 0.25 0.37 e - 0.40 - land pattern notes: 1. compound dimension: 3.31.3; 2. unit: mm; 3. general tolerance 0.05mm unless otherwise specified; 4. the layout is just for reference. tape and reel orientation
________________________________________________________________________ http://www.union-ic.com rev.01 aug.2012 11/11 um4701/4711/8701/8711 important notice the information in this document has been ca refully reviewed and is believed to be accurate. nonetheless, this document is subjec t to change without notice. union assumes no responsibility for any inaccuracies that may be contained in this document, and makes no commitment to update or to keep current the contained information, or to notify a person or organization of any update. union rese rves the right to make changes, at any time, in order to improve reliability, function or design and to attempt to supply the best product possible. union semiconductor, inc add: 2f, no. 3, lane 647 songtao road, shanghai 201203 tel: 021-51093966 fax: 021-51026018 website: www.union-ic.com

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