* rohs directive 2002/95/ec jan 27, 2003 including annex. ** bourns follows the prevailing definition of ?alogen free?in the industry. bourns considers a product to be ?alogen free? if (a) the bromine (br) content is 900 ppm or less; (b) the chlorine (cl) content is 900 ppm or less; and (c) the total bromine (br) and chlorine (cl) content is 1500 ppm or less . specifications are subject to change without notice. customers should verify actual device performance in their specific applications. cd143a-sr2.8~3.3 ?steering/tvs diode array series features rohs compliant* halogen free** esd protection protects 2 lines low leakage current low capacitance applications ethernet - 10/100/1000 base t firewire and usb portable electronics video/graphic cards general information absolute maximum ratings (@ t a = 25 ? unless otherwise noted) electrical and thermal characteristics (@ t a = 25 ? unless otherwise noted) notes: 1. see peak pulse power vs. pulse time. 2. from pin 4 to pin 1. 3. see pulse wave form. 4. from pin 1 to pin 3, pin 1 to pin 2 the cd143a-sr2.8 and cd143a-sr3.3 devices provides esd protection for the external ports of portable electronic devices such as cell phones, handheld electronics and personal computers. the esd protection provided by the component enables a data port to withstand a minimum ? kv contact / ?5 kv air discharge per the esd test method specified in iec 61000-4-2. the device measures 2.80 mm x 1.20 mm and is available in a sot-143 package intended to be mounted directly onto an fr4 printed circuit board. the bourns device will meet iec 61000-4-2 (esd), iec 61000-4-4 (eft) and iec 61000-4-5 (surge) requirements. parameter symbol value unit peak pulse power (t p = 8/20 ?) 1 p pp 200 w peak pulse current (t p = 8/20 ?) i pp 12 a operating supply voltage (vdd - gnd) v dc 3.8 v esd per iec 61000-4-2 (air) v esd ?0 kv (contact) dc voltage at any i/o pin v io (gnd - 0.50) to (vdd + 0.5) v operating temperature t j -55 ?c to 125 ?c ?c storage temperature t stg -55 ?c to 150 ?c ?c 1 gnd i/o ref i/o 2 4 3 parameter symbol cd143a-sr2.8 cd143a-sr3.3 unit breakdown voltage minimum @ 2 ? 2 v br 3.0 3.5 v working peak voltage 2 v wm 2.8 3.3 v snap-back voltage minimum @ 50 ma v sb 2.8 3.3 v clamping voltage maximum @ i p = 1 a 2,3 v c 5.0 7.0 v clamping voltage maximum @ i p 2,3 v c 8.5 @ 5 a 15 @ 10 a v reverse leakage current maximum @ v wm 2 i l 5.0 ua forward voltage maximum @ 15 ma v f 1.0 v leakage current @ v wm 4 i d 1.0 ? capacitance typical @ 0 v, 1 mhz 4 c j 4.5 pf esd protection per iec 61000-4-2 minimum contact discharge esd +/-8 kv minimum air discharge +/-15 eft protection per iec 61000-4-4 @ 5/50ns eft 40 a surge protection per iec 61000-4-5 @ 8/20? surge 12 a *rohs compliant
specifications are subject to change without notice. customers should verify actual device performance in their specific applications. cd143a-sr2.8~3.3 ?steering/tvs diode array series product dimensions recommended pad layout b d i k e g h f j c a mm (inches) dimensions: 1.90 (0.075) 1.70 (0.067) 1.20 (0.047) 0.80 (0.031) 0.85 (0.033) 0.85 (0.033) 0.85 (0.033) 1.05 (0.041) 1.90 (0.075) 2.75 (0.108) 2.85 (0.112) mm (inches) dimensions: dimensions a 2.80 - 3.04 (0.110 - 0.12) b 1.78 - 2.03 (0.070 - 0.080) c 2.11 - 2.48 (0.083 - 0.098) d 1.20 - 1.39 (0.047 - 0.055) e 0.39 - 0.50 (0.015 - 0.020) f 0.79 - 0.93 (0.031 - 0.037) g 0.08 - 0.15 (0.003 - 0.006) h 0.46 - 0.60 (0.018 - 0.024) i 0.84 - 1.14 (0.033 - 0.045) j 0.72 - 0.83 (0.028 - 0.033) k 0.013 - 0.10 (0.0005 - 0.004) this is a molded jedec sot-143 device. it weighs approximately 35 mg and has a flammability rating of ul 94v-0. the dimensions for the packaged device are shown below. block diagram 1 gnd i/o ref i/o 2 4 3 this is the footprint recommended for this sot-143 device. the device block diagram below includes the pin names and basic electrical connections associated with each channel. typical part marking cd143a-sr2.8 ..............................................................................2a cd143a-sr3.3 ..............................................................................3a
specifications are subject to change without notice. customers should verify actual device performance in their specific applications. cd143a-sr2.8~3.3 ?steering/tvs diode array series performance graphs pulse wave form clamping voltage vs. peak pulse current 0 1 2 3 4 5 6 415 13 6 5 7 8 9 10 11 12 14 forward clamping voltage (v) peak pulse current (a) waveform parameters t r = 8 ? t d = 20 ? 0 1 2 3 4 5 6 7 8 9 10 12 11 415 13 6 5 7 8 9 10 11 12 14 clamping voltage (v) peak pulse current (a) waveform parameters t r = 8 ? t d = 20 ? 20 40 60 80 100 120 0 030 25 20 15 10 5 i pp ?peak pulse current (% of i pp ) t ?time (?) waveform parameters t t = 8 ? t d = 20 ? t t e t t d = t | i pp /2 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.000 0.825 1.650 2.475 3.300 capacitance (pf) input voltage (v) vdd = 3.3 v, gnd = 0 v, f = 1 mhz, t = 25 ? 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0.000 0.825 1.650 2.475 3.300 input capacitance (pf) input voltage (v) vdd = 3.3 v, gnd = 0 v, f = 1 mhz, t = 25 ? forward clamping voltage vs. peak pulse current typical variation of c i/o-to-i/o vs. v in typical variation of c in vs. v in how to order cd 143a - sr 2.8 common code chip diode package ?143a = sot-143 model sr = steering diode array repetitive peak reverse voltage 2.8 = 2.8 v rwm (volts) 3.3 = 3.3 v rwm (volts)
specifications are subject to change without notice. customers should verify actual device performance in their specific applications. cd143a-sr2.8~3.3 ?steering/tvs diode array series packaging information asia-pacific: tel: +886-2 2562-4117 ?fax: +886-2 2562-4116 europe: tel: +41-41 768 5555 ?fax: +41-41 768 5510 the americas: tel: +1-951 781-5500 ?fax: +1-951 781-5700 www.bourns.com rev. 06/11 the surface mount product is packaged in an 8 mm x 4 mm tape and reel format per eia-481 standard. item symbol sot-143 carrier width a 2.75 ?.10 (0.108 - 0.004) carrier length b 3.30 ?.10 (0.130 - 0.004) carrier depth c 1.25 ?.10 (0.049 - 0.004) sprocket hole d 1.55 ?.05 (0.061 - 0.002) reel outside diameter d 178 (7.008) reel inner diameter d 1 50.0 (1.969) min. feed hole diameter d 2 13.0 ?.20 (0.512 - 0.008) sprocket hole position e 1.75 ?.10 (0.069 - 0.004) punch hole position f 3.50 ?.05 (0.138 - 0.002) punch hole pitch p 4.00 ?.10 (0.157 - 0.004) sprocket hole pitch p 0 4.00 ?.10 (0.157 - 0.004) embossment center p 1 2.00 ?.05 (0.079 - 0.002) overall tape thickness t 0.20 ?.10 (0.008 - 0.004) tape width w 8.00 ?.20 (0.315 - 0.008) reel width w 1 14.4 (0.567) max. quantity per reel 3,000 ....... ....... ....... ....... ....... ....... ....... ....... pb f e d t 120 d 2 d d 1 w 1 c index hole p 0 p 1 w a 10 pitches (min.) direction of feed 10 pitches (min.) end trailer device leader start mm (inches) dimensions:
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