TISP83121D

*RoHS COMPLIANT TISP83121D DUAL-GATE UNIDIRECTIONAL OVERVOLTAGE PROTECTOR TISP83121D Unidirectional P & N-Gate Protector Overvoltage Protection for Dual-Voltage Ringing SLICs – Programmable Protection Configurations up to ±100 V – Typically 5 Lines Protected by: Two TISP83121D + Diode Steering Networks High Surge Current – 150 A, 10/1000 µs – 250 A, 10/700 µs – 500 A, 8/20 µs Pin Compatible with the LCP3121 – 50 % more surge current – Functional Replacement in Diode Steering Applications Small Outline Surface Mount Package Description The TISP83121D is a dual-gate reverse-blocking unidirectional thyristor designed for the protection of dual-voltage ringing SLICs (Subscriber Line Interface Circuits) against overvoltages on the telephone line caused by lightning, a.c. power contact and induction. 8-SOIC Package (Top View) K1 G1 2 8K 7A G2 3 K4 6A 5K MD6XAYB For operation at the rated current values connect pins 1, 4, 5 and 8 together. Device Symbol A G2 The device chip is a four-layer NPNP silicon thyristor structure which has an electrode connection to every layer. For negative overvoltage protection the TISP83121D is used in a common anode configuration with the voltage to be limited applied to the cathode (K) terminal and the negative reference potential applied to the gate 1 (G1) terminal. For positive overvoltage protection the TISP83121D is used in a common cathode configuration with the voltage to be limited applied to the anode (A) terminal and the positiv...