___________________________________________________________________________ http://www.union-ic.com rev.02 nov.2007 1/6 UESD6V85CT36 5 line esd protection diode array UESD6V85CT36 sc70-6 / sc88 / sot363 general description the UESD6V85CT36 of tvs 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, each device will protect up to five 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 clamping voltage, and no device degradation. the UESD6V85CT36 may be used to meet the esd immunity requirements of iec 61000-4-2, level 4. the small package makes them ideal for use in portable electronics such as cell phones, pdas, notebook computers, and digital cameras. applications features cellular handsets & accessories cordless phones personal digital assistants (pdas) notebooks & handhelds portable instrumentation digital cameras peripherals mp3 players transient protection for data lines to iec 61000-4-2 (esd) 15kv (air), 8kv (contact) protects five i/o lines ultra-small sc70-6/sc88/sot363 package working voltage: 5v low leakage current low operating and clamping voltages solid-state silicon-avalanche technology pin configurations top view ? ?:option m: monthly code UESD6V85CT36 sc70-6 / sc88 / sot363
___________________________________________________________________________ http://www.union-ic.com rev.02 nov.2007 2/6 UESD6V85CT36 ordering information part number working voltage packaging type channel marking code shipping qty UESD6V85CT36 5.0v sc70-6 / sc88 / sot363 5 52c 3000/7 inch reel absolute maximum ratings rating symbol value units peak pulse power (tp = 8/20 s) @ t a 25 p pk 140 watts thermal resistance, junction to ambient r ja 325 c/w 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 maximum junction temperature t jmax 150 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 pin 1, 3, 4, 5, 6 to 2 v r = 0v, f = 1mhz 40 50 pf junction capacitance c j pin 1, 3, 4, 5, 6, to 2 v r = 2.5v, f = 1mhz 30 40 pf
___________________________________________________________________________ http://www.union-ic.com rev.02 nov.2007 3/6 UESD6V85CT36 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) 0246810 6 7 8 9 10 11 12 13 waveform parameters: tr=8us td=20us clamping voltage - vc(v) peak pulse current - ipp(a) forward voltage vs. forward current junction capacitance vs. reverse voltage 24681012 1 2 3 4 5 6 7 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)
___________________________________________________________________________ http://www.union-ic.com rev.02 nov.2007 4/6 UESD6V85CT36 applications information UESD6V85CT36 esd protection diode is designed to protect 5 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 towards the line that is to be protected. device connection for protection of quad data lines the UESD6V85CT36 tvs diode array is designed to protect up to five unidirectional data lines. the device as follows: unidirectional protection of five i/o lines is achieved by connecting pins 1, 3, 4, 5, and 6 to the data lines. pin 2 is connected to ground. the ground connection should be made directly to the ground plane for best results. the path length is kept as sh ort as possible to reduce the effects of parasitic inductance in the board traces. circuit board layout recommenda tions for suppression of esd good circuit board layout is critical for the suppression of esd induced transients. the following guidelines are recommended: place the tvs near the input terminals or connectors to restrict transient coupling. minimize the path length between the tvs and the protected line. minimize all conductive loops including power and ground loops. the esd transient return path to ground should be kept as short as possible. never run critical signals near board edges. use ground planes whenever possible. for multilayer printed-circuit boards, use ground vias. keep parallel signal paths to a minimum. avoid running protection conductors in parallel with unprotected conductor. minimize all printed-circuit board conductive loops including power and ground loops. avoid using shared transient return paths to a common ground point.
___________________________________________________________________________ http://www.union-ic.com rev.02 nov.2007 5/6 UESD6V85CT36 package information UESD6V85CT36 sc70-6 / sc88 / sot363 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.02 nov.2007 6/6 UESD6V85CT36 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: 7f, no. 5, bibo road, shanghai 201203 tel: 021-51097928 fax: 021-51026018 website: www.union-ic.com
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