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___________________________________________________________________________ http://www.union-ic.com rev.01 mar.2012 1/11 uesd54b/55b/56b/57b/64b quad/five/six line esd protection diode array uesd54b sc70-5/sc88a/sot353 uesd55b sc89-6/sot563/sot666 uesd56b sc89-6/sot563/sot666 uesd57b dfn1616-6l UESD64B sc89-5/sot553/sot665 general description the uesd54b/55b/56b/57b/64b of tvs diode array is designed to protect sensitive electronics from damage or latch-up due to esd for use in applications where board space is at a premium. it is unidirectional device and may be used on lines where the signal polarities are above ground. the uesd54b/55b/64b will protect up to four lines, th e uesd56b will protect up to five lines and the uesd57b will protect up to six lines. tvs diodes are solid-state devices feature large cr oss-sectional area junctions for conducting high transient currents, specifically for transient suppre ssion. it offers desirable characteristics for board level protection including fast response time, low operating, low clamping voltage, and no device degradation. the uesd54b/55b/56b/57b/64b may be used to meet the immunity requirements of iec 61000-4-2, level 4. the small package makes them ideal for use in portable electronics such as cell phones, pda?s, notebook computers, and digital cameras. applications features z cellular handsets & accessories z cordless phones z personal digital assistants (pda?s) z notebooks & handhelds z portable instrumentation z digital cameras z peripherals z mp3 players z transient protection for data & power lines to iec 61000-4-2 (esd) 15kv (air), 8kv (contact) z working voltages: 5v z low leakage current z low clamping voltage z solid-state silicon avalanche technology ordering information part number working voltage packaging type channel marking code shipping qty uesd54b 5.0v sc70-5/sc88a/sot353 4 uq5 uesd55b 5.0v sc89-6/sot563/sot666 4 uf5 uesd56b 5.0v sc89-6/sot563/sot666 5 ub5 uesd57b 5.0v dfn1616-6l 6 e57 UESD64B 5.0v sc89-5/sot553/sot665 4 ur6 3000pcs/ 7 inch reel
___________________________________________________________________________ http://www.union-ic.com rev.01 mar.2012 2/11 uesd54b/55b/56b/57b/64b pin configurations uesd54b sc70-5/sc88a/sot353 uesd55b sc89-6/sot563/sot666 uesd56b sc89-6/sot563/sot666 uesd57b dfn1616-6l UESD64B sc89-5/sot553/sot665 top view m: month code uesd54b sc70-5/sc88a/sot35 3 m: month code uesd55b sc89-6/sot563/sot666 m: month code uesd56b sc89-6/sot563/sot666 ww: week code uesd57b dfn1616-6l m: month code UESD64B sc89-5/sot553/sot665 2 1 3 4 5 2 1 3 4 6 5 2 1 3 4 6 5 2 1 3 4 5
___________________________________________________________________________ http://www.union-ic.com rev.01 mar.2012 3/11 uesd54b/55b/56b/57b/64b absolute maximum ratings rating symbol value units peak pulse power (tp = 8/20 s) p pk 140 watts peak pulse current (tp = 8/20 s) i pp 11 a lead soldering temperature t l 260(10 sec.) c operating temperature t j -55 to +125 c storage temperature t stg -55 to +125 c electrical characteristics parameter symbol conditions min typ max unit reverse stand-off voltage v rwm 5 v reverse breakdown voltage v br it = 1ma 6 6.8 7.2 v reverse leakage current i r v rwm = 5v, t=25c 0.1 a i pp =5a, t p = 8/20 s 9.1 clamping voltage v c i pp =11a, t p = 8/20 s 13 v junction capacitance c j between i/o pins and gnd v r = 0v, f = 1mhz 40 50 pf junction capacitance c j between i/o pins and gnd v r = 2.5v, f = 1mhz 30 40 pf
___________________________________________________________________________ http://www.union-ic.com rev.01 mar.2012 4/11 uesd54b/55b/56b/57b/64b typical operating characteristics non-repetitive peak pulse power vs. pulse time clamping voltage vs. peak pulse current 0.04 0.1 1 10 100 1000 0.02 0.1 1 peak pulse power - ppk(kw) pulse duration - tp(us) forward voltage vs. forward current junction capacitance vs. reverse voltage 246810 1 2 3 4 5 6 waveform parameters: tr=8us td=20us forward voltage - vf(v) forward current - if(a) 012345 30 35 40 45 50 junction capacitance(pf) reverse voltage (v) 0246810 6 7 8 9 10 11 12 13 waveform parameters: tr=8us td=20us clamping voltage - vc(v) peak pulse current - ipp(a)
___________________________________________________________________________ http://www.union-ic.com rev.01 mar.2012 5/11 uesd54b/55b/56b/57b/64b applications information uesd54b/55b/56b/57b/64b esd protection diode is designed to protect quad/five/six data, i/o, or power supply line. the device is unidirectional and may be used on lines where the signal polarity is above ground. the cathode should be placed toward s the line that is to be protected. circuit board layout recommendat ions for suppression of esd good circuit board layout is critical for the su ppression of esd induced transients. the following guidelines are recommended: 1. place the tvs near the input terminals or conn ectors to restrict transient coupling. 2. minimize the path length between the tvs and the protected line. 3. minimize all conductive loops including power and ground loops. 4. the esd transient return path to ground should be kept as short as possible. 5. never run critical signals near board edges. 6. use ground planes whenever possible. for multilayer printed-circuit boards, use ground vias. 7. keep parallel signal paths to a minimum. 8. avoid running protection conductors in parallel with unprotected conductor. 9. minimize all printed-circuit board conductive loops including power and ground loops. 10. avoid using shared transient return paths to a common ground point.
___________________________________________________________________________ http://www.union-ic.com rev.01 mar.2012 6/11 uesd54b/55b/56b/57b/64b package information uesd54b sc70-5/sc88a/sot353 outline drawing dimensions millimeters inches symbol min max min max a 0.900 1.100 0.035 0.043 a1 0.000 0.100 0.000 0.004 a2 0.900 1.000 0.035 0.039 b 0.150 0.350 0.006 0.014 c 0.080 0.150 0.003 0.006 d 2.000 2.200 0.079 0.087 e 1.150 1.350 0.045 0.053 e1 2.150 2.450 0.085 0.096 e 0.650ref 0.026ref e1 1.200 1.400 0.047 0.055 l 0.525ref 0.021ref l1 0.260 0.460 0.010 0.018 0 8 0 8 land pattern notes: 1. compound dimension: 2.101.25; 2. unit: mm; 3. general tolerance0.05mm unless otherwise specified; 4. the layout is just for reference. tape and reel orientation
___________________________________________________________________________ http://www.union-ic.com rev.01 mar.2012 7/11 uesd54b/55b/56b/57b/64b uesd55b sc89-6/sot563/sot666 outline drawing dimensions millimeter s inches symbol min max min max a 0.525 0.600 0.021 0.024 a1 0.000 0.050 0.000 0.002 b 0.150 0.300 0.006 0.012 c 0.090 0.180 0.004 0.007 d 1.500 1.700 0.059 0.067 e 1.100 1.300 0.043 0.051 e1 1.500 1.700 0.059 0.067 e 0.450 0.550 0.018 0.022 l 0.100 0.300 0.004 0.012 7ref 7ref land pattern notes: 1. compound dimension: 1.601.20; 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 mar.2012 8/11 uesd54b/55b/56b/57b/64b uesd56b sc89-6/sot563/sot666 outline drawing dimensions millimeter s inches symbol min max min max a 0.525 0.600 0.021 0.024 a1 0.000 0.050 0.000 0.002 b 0.150 0.300 0.006 0.012 c 0.090 0.180 0.004 0.007 d 1.500 1.700 0.059 0.067 e 1.100 1.300 0.043 0.051 e1 1.500 1.700 0.059 0.067 e 0.450 0.550 0.018 0.022 l 0.100 0.300 0.004 0.012 7ref 7ref land pattern notes: 1. compound dimension: 1.601.20; 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 mar.2012 9/11 uesd54b/55b/56b/57b/64b uesd57b dfn6 1.61.6 outline drawing dimensions millimeters symbo l min typ max a 0.545 0.575 0.605 a1 0 0.02 0.05 a3 - 0.13 - b 0.20 0.25 0.30 d 1.55 1.60 1.675 d2 1.10 1.20 1.30 e 1.55 1.60 1.675 e2 0.30 0.40 0.50 e - 0.50 - l 0.275 0.325 0.375 land pattern notes: 1. compound dimension: 1.601.60; 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 mar.2012 10/11 uesd54b/55b/56b/57b/64b UESD64B sc89-5/sot553/sot665 outline drawing dimensions millimeters inches symbol min max min max a 0.525 0.620 0.021 0.024 a1 0.000 0.050 0.000 0.002 b 0.150 0.300 0.006 0.012 c 0.090 0.180 0.004 0.007 d 1.500 1.700 0.059 0.067 e 1.100 1.300 0.043 0.051 e1 1.500 1.700 0.059 0.067 e 0.450 0.550 0.018 0.022 l 0.100 0.300 0.004 0.012 7ref 7ref *: the maximum length is 0.10mm. land pattern notes: 1. compound dimension: 1.601.20: 2. unit: mm; 3. general tolerance0.05mm unless otherwise specified; 4. the layout is just for reference. tape and reel orientation
___________________________________________________________________________ http://www.union-ic.com rev.01 mar.2012 11/11 uesd54b/55b/56b/57b/64b important notice the information in this document has been carefully reviewed and is believed to be accurate. nonetheless, this document is subject 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 reserves 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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