july 2000 - revised march 2005 specifications are subject to change without notice. customers should verify actual device performance in their specific applications. tisp8250d overvoltage and overcurrent protector tisp8250d unidirectional p-gate thyristor overvoltage and overcurrent protector device symbol telecommunication system 30 a 10/1000 protector ion-implanted breakdown region - precise and stable voltage rated for international surge wave shapes how to order 8-soic package (top view) description the tisp8250d is a p-gate reverse-blocking thyristor (scr) designed for the protection of telecommunications equipment against overvoltages and overcurrents on the telephone line caused by lightning, a.c. power contact and induction. the fixed voltage an d current triggered modes make the tisp8250d particularly suitable for the protection of ungrounded customer premise equipment. connected across the d.c. side of a telephone set polarity bridge, in fixed voltage mode these devices can protect the ringer in the on-h ook condition. in an off-hook condition, either the fixed voltage or current triggered modes can protect the following telephone electronics. without external gate activation, the tisp8250d is a fixed voltage protector. the maximum working voltage without clipping is 2 50 v and the protection voltage is 340 v. lower values of protection voltage may be set by connecting an avalanche breakdown diode of le ss than 250 v between the tisp8250d gate and anode (see figure 2.) by connecting a small value resistor in series with the line conductor and connecting the tisp8250d gate cathode terminals in p arallel with the resistor, conductor overcurrents can gate trigger the tisp8250d into conduction. overvoltages are initially clipped by breakdown clamping until the voltage rises to the breakover level, which causes the devic e to crowbar into a low-voltage on state. overcurrents develop sufficient voltage across the external gate-cathode resistor to trigger the d evice into a low-voltage on state. this low-voltage on state causes the current resulting from the overstress to be safely diverted through the device. the high crowbar holding current prevents d.c. latchup as the diverted current subsides. functional replacement for tpp25011 device name v drm v v (bo) v tisp8250d 250 340 wave shape standard i ppsm a 2/10 gr-1089-core 75 0.5/700 cnet i 31-24 40 10/700 itu-t k.20/21 40 10/1000 gr-1089-core 30 md8xaaa 1 2 3 4 5 6 7 8 a a a a nc g k nc nc - no internal connection k g sd8xaa a .............................................. ul recognized component *rohs directive 2002/95/ec jan 27 2003 including annex device package carrier tisp8250d 8-soic embossed tape reeled TISP8250DR tube tisp8250d TISP8250DR-s 8250 2500 tisp8250d-s 1500 for standard termination finish order as for lead free termination finish order as marking code standard quantity *r oh s c o m p l ia n t v e r s io n s a v a il a b l e
july 2000 - revised march 2005 specifications are subject to change without notice. customers should verify actual device performance in their specific applications. electrical characteristics, t a = 25 c (unless otherwise noted) tisp8250d overvoltage and overcurrent protector absolute maximum ratings, t a = 25 c (unless otherwise noted) thermal characteristics, t a = 25 c (unless otherwise noted) rating symbol value unit repetitive peak off-state voltage (see note 1) v drm 250 v non-repetitive peak impulse current (see notes 2, 3 and 4) i ppsm 75 40 40 40 30 a 2/10 s (telcordia gr-1089-core, 2/10 s waveshape) 0.2/310 (cnet i 31-24, 0.5/700 s waveshape) 5/310 s (itu-t k.20/21, 10/700 s voltage waveshape) 5/310 s (ftz r12, 10/700 s voltage waveshape) 10/1000 s (telcordia gr-1089-core, 10/1000 s voltage waveshape) non-repetitive peak on-state current, 50 hz (see notes 2, 3 and 4) i tsm 5 3.5 0.7 a 10 ms half sine wave 1s rectified sine wave 1000 s rectified sine wave junction temperature t j -40 to +150 c storage temperature range t stg -65 to +150 c notes: 1. for voltage values at lower temperatures, derate at 0.13 %/ c. 2. initially the device must be in thermal equilibrium, with t j = 25 c. 3. the surge may be repeated after the device returns to its initial conditions. 4. eia/jesd51-2 environment and eia/jesd51-3 pcb with standard footprint dimensions connected with 5 a printed wiring track widths. derate current values at -0.61 %/ c for ambient temperatures above 25 c. parameter test conditions min typ max unit i drm repetitive peak off-state current v d = v drm t a = 25 c t a = 85 c 5 10 a v (bo) breakover voltage dv/dt = 250 v/ms, r source = 300 ? 340 v i (bo) breakover current dv/dt = 250 v/ms, r source = 300 ? 15 200 ma i h holding current i t = 5 a, di/dt = -30 ma/ms 180 ma v gk gate-cathode voltage i g = 30 ma 0.6 1.2 v i gt gate trigger current v ak =100v 40 ma i d off-state current v d =60v 5 a c o off-state capacitance f = 1 mhz, v d = 1 v rms, v d = 5 v 100 pf parameter test conditions min typ max unit r ja junction to ambient thermal resistance eia/jesd51-3 pcb, i t = i tsm(1000) (see note 5) 170 c/w note 5. eia/jesd51-2 environment and pcb has standard footprint dimensions connected with 5a rated printed wiring track widths.
july 2000 - revised march 2005 specifications are subject to change without notice. customers should verify actual device performance in their specific applications. parameter measurement information tisp8250d overvoltage and overcurrent protector figure 1. voltage-current characteristic for a and k terminals all measurements are referenced to the k terminal pm8xaaa quadrant i anode positive switching characteristic quadrant iii anode negative reverse characteristic i h +v -i -v v drm +i v (bo) v d i d i drm i (bo) figure 2. overvoltage protection circuit k g ai8xacaa a avalanche diode v (br) < 25 0 v tisp- 8250d
bourns sales offices region phone fax the americas: +1-951-781-5500 +1-951-781-5700 europe: +41-41-7685555 +41-41-7685510 asia-pacific: +886-2-25624117 +886-2-25624116 technical assistance region phone fax the americas: +1-951-781-5500 +1-951-781-5700 europe: +41-41-7685555 +41-41-7685510 asia-pacific: +886-2-25624117 +886-2-25624116 www.bourns.com bourns products are available through an extensive network of manufacturer s representatives, agents and distributors. to obtain technical applications assistance, a quotation, or to place an order, contact a bourns representative in your area. ?isp?is a trademark of bourns, ltd., a bourns company, and is registered in u.s. patent and trademark office. ?ourns?is a registered trademark of bourns, inc. in the u.s. and other countries. copyright? 2004, bourns, inc. litho in u.s.a. e 12/04/tsp0410 reliable electronic solutions
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