TISP4290LP

TISP4290LP SYMMETRICAL TRANSIENT VOLTAGE SUPPRESSORS Copyright © 1997, Power Innovations Limited, UK APRIL 1987 - REVISED SEPTEMBER 1997 TELECOMMUNICATION SYSTEM SECONDARY PROTECTION q Ion-Implanted Breakdown Region Precise and Stable Voltage Low Voltage Overshoot under Surge DEVICE ‘4290LP V(Z) V 200 V(BO) V 290 LP PACKAGE (TOP VIEW) A(T) NC B(R) 1 2 3 NC - No internal connection MDTRAB q Planar Passivated Junctions Low Off-State Current < 10 µA Rated for International Surge Wave Shapes WAVE SHAPE 8/20 µs 0.2/310 µs 10/700 µs STANDARD ANSI C62.41 RLM 88 VDE 0433 CCITT IX K17 ITSP A 150 38 50 38 q LP PACKAGE WITH FORMED LEADS (TOP VIEW) A(T) NC B(R) NC - No internal connection MD4XAF 1 2 3 q Package Options PACKAGE LP LP with fomed leads PACKING Bulk Tape and Reel PART # SUFFIX None R device symbol q UL Recognized, E132482 description The TISP4290LP is designed specifically for telephone equipment protection against lightning and transients induced by a.c. power lines. These devices consist of a bidirectional suppressor element connecting the A and B terminals. They will suppress inter-wire voltage transients. Transients are initially clipped by zener action until the voltage rises to the breakover level, which causes the device to crowbar. The high crowbar holding current prevents d.c. latchup as the transient subsides. These monolithic protection devices are fabricated in ion-implanted planar structures to ensure precise and matched breakover control and...