1 www.protekdevices.com 05096.r3 1/02 low capacitance steering diode & tvs arra ys applications ? ethernet - 10/100 base t ? computer i/o ports- scsi, firewire & usb ? set top box protection iec compa tibility (en61000-4) ? 61000-4-2 (esd): air - 15kv, contact - 8kv ? 61000-4-4 (eft): 40a - 5/50ns ? 61000-4-5 (surge): 24a, 8/20s - level 2(line-gnd) & level 3(line-line) fea tures ? 500 watts peak pulse power dissipation(t p = 8/20s) ? unidirectional configuration ? available in 4 voltage types: 3.3v to 15v ? protects up to four (4) i/o ports ? esd protection > 40 kilovolts ? low capacitance -15pf mechanical characteristics ? molded jedec so-8 ? weight 15 milligrams (approximate) ? flammability rating ul 94v-0 ? 12mm tape and reel per eia standard 481-1-a ? device marking code & logo ? pin 1 indicated by dot on package circuit diagram so-8 . . . engineered solutions for the transient environment? 05096 psrda3.3-4 thru pSRDA15-4 4 1 2 8 7 6 5 3 gnd i/o 4 i/o 3 gnd i/o 2 +v ref +v ref i/o 1
2 www.protekdevices.com 05096.r3 1/02 psrda3.3-4 thru pSRDA15-4 device characteristics 0.01 1 10 100 1,000 10,000 t d - pulse duration - s 0 5 10 15 20 25 30 t - time - s 0 20 40 60 80 100 120 i pp - peak pulse current - % of i pp test waveform parameters t f = 8s t d = 20s t f peak value i pp e -t t d = t i pp /2 figure 2 pulse wave form 10 100 1,000 10,000 p pp - peak pulse current - watts figure 1 peak pulse power vs pulse time 500w, 8/20s waveshape note 1: spice model and parameters for this series are available on the protek devices web site: www .protekde vices .com . note 2: capacitance measured at v wm = v cc connected between i/o pins to pin 8 and 5 (gnd). v r = v wm @ 1mhz. as shown in figure 5, ref1 is connected to ground, ref2 is connected to +v cc , and input applies to v cc = 5v, v sign = mv, f = 1 mhz. electrical characteristics per line @ 25c unless otherwise specified pa r t number (see note 1) device marking minimum breakdown voltage @ 1ma v (br) volts maximum clamping voltage (see fig. 2) @ i p = 1a v c volts maximum clamping voltage (see fig. 2) @8/20s v c @ i pp maximum capacitance (see note 2) (see figure 5) 0v @ 1 mhz c pf psrda3.3-4 psrda05-4 psrda12-4 pSRDA15-4 pra prb prd pre 4.0 6.0 13.3 16.7 6.5 9.8 19.0 24.0 10.9v @ 43.0a 13.5v @ 42.0a 25.9v @ 21.0a 30.0v @ 17.0a 15 15 15 15 maximum leakage current @v wm i d a 125 20 1 1 rated stand-off voltage v wm volts 3.3 5.0 12.0 15.0 maximum ratings @ 25c unless otherwise specified operating temperature symbol value -55 c to 150 cc c -55 c to 150 c units t j parameter storage temperature volts 1.1 v f maximum forward voltage @ 100 ma (see note 1) t stg note 1: measured between pins 8 or 5 to 1, 2, 3, 4, 6 and 7.
3 www.protekdevices.com 05096.r3 1/02 psrda3.3-4 thru pSRDA15-4 graphs 0 25 50 75 100 125 150 t l - lead temperature - c 20 40 60 80 100 % of rated power peak pulse power 8/20s average power figure 3 power derating curve 0 figure 4 overshoot & clamping voltage for psrda05-4 esd test pulse: 8 kilovolt, 1/30ns (waveshape) 5 volts per division 0 10 20 30 40 psrda05-4 0 5 10 15 20 25 30 i pp - peak pulse current - amps v c - clamping voltage - volts 0 4 8 12 figure 6 typical clamping voltage vs peak pulse current figure 8 return loss - psrda12-4 100 mhz per division 10 db per division -50 db -20 db ref 0 db 20 db figure 7 insertion loss - psrda12-4 100 mhz per division 10 db per division -50 db -20 db ref 0 db 20 db figure 5 input capacitance circuit g ref2 +v cc ref1 v r i/o
4 www.protekdevices.com 05096.r3 1/02 psrda3.3-4 thru pSRDA15-4 application note the psrdaxx-4 series are low capacitance, unidirectional tvs arrays that are designed to protect i/o or high speed data lines f rom the damaging effects of esd or eft. this product series has a surge capability of 500 watts p pp per line for an 8/20s waveshape and offers esd protection > 40kv. differential mode configuration (figure 1) ideal for use in usb applications, the psrdaxx-4 series provides up to four (4) lines of protection in a differential mode configuration as depicted in figure 1. circuit connectivity is as follows: ? pins 1, 4, 6 and 7 are connected to the data lines. ? pins 5 and 8 are connected to ground. ? pins 2 and 3 are connected to the databus. differential mode configuration (figure 2) the psrdaxx-4 series also provides up to four (4) lines of protection in a differential mode configuration as depicted in figure 2 for t1/e1 applications. circuit connectivity is as follows: ? pins 1, 4, 6 and 7 are connected to the data lines. ? pins 5 and 8 are connected to ground. ? pins 2 and 3 are connected to the databus. circuit bo ard la y out recommend a tions circuit board layout is critical for electromagnetic compat- ibility (emc) protection. the following guidelines are recommended: ? the protection device should be placed near the input terminals or connectors, the device will divert the transient current immediately before it can be coupled into the nearby traces. ? the path length between the tvs device and the protected line should be minimized. ? all conductive loops including power and ground loops should be minimized. ? the transient current return path to ground should be kept as short as possible to reduce parasitic induc- tance. ? ground planes should be used whenever possible. for multilayer pcbs, use ground vias. figure 2. typical differential-mode t1/e1 protection 4 1 2 8 7 6 5 3 ptc ptc ptc ptc plc01-6 plc01-6 gnd gnd tring ttip rtip rring t1/e1 transceiver 4 1 2 8 7 6 5 3 figure 1. typical differential-mode usb protection usb port v bus gnd d+ d- usb port v bus gnd d+ d- usb controller v bus gnd gnd
5 www.protekdevices.com 05096.r3 1/02 psrda3.3-4 thru pSRDA15-4 package outline & dimensions protek devices 2929 south fair lane, tempe, az 85282 tel: 602-431-8101 fax: 602-431-2288 e-mail: sales@protekdevices.com web site: www.protekdevices.com copyright ? protek devices 2001 specifications: protek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except jedec). design changes: protek reserves the right to discontinue product lines without notice, and that the final judgement concerning selection and specifications is the buyer ? s and that in furnishing engineering and technical assistance, protek assumes no responsibility with respect to the selection or specifications of such products. a b c d f g j k p r 4.80 3.80 1.35 0.35 0.40 1.27 bsc 0.18 0.10 5.80 0.25 5.00 4.00 1.75 0.49 1.250 1.27 bsc 0.25 0.25 6.20 0.50 0.189 0.150 0.054 0.014 0.016 0.05 bsc 0.007 0.004 0.229 0.010 0.196 0.157 0.068 0.019 0.049 0.05 bsc 0.009 0.008 0.244 0.019 dim min max min max millimeters inches package dimensions notes: 1. - t - = seating plane and datum surface. 2. dimensions ? a ? and ? b ? are datum. 3. dimensions ? a ? and ? b ? do not include mold protrusion. 4. maximum mold protrusion is 0.015 ? (0.380 mm) per side. 5. dimensioning and tolerances per ansi y14.5m, 1982. 6. dimensions are exclusive of mold flash and metal burrs. -a- p -b- d g 8 5 4 1 -t- k c r x 45 o j f 0 o - 10 o 0.010 ? (0.25 mm) m b m 4 pl 0.010 ? (0.25 mm) s b m 8 pl t a s package outline so-8 0.030 ? 0.005 ? 0.050 ? 0.005 ? 0.160 ? 0.005 ? 0.045 ? 0.005 ? 0.245 ? min mounting pad 06009 rev 1 -11/01 t ape & reel p a cka ging: surface mount product is taped and reeled in accordance with eia-481, reel quantites and sizes are as follows: 7 inch reel - 1,000 pieces per reel; 13 inch reel - 2,500 pieces per reel
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