Description
The TISP61521 is a dual forward-conducting buffered p-gate overvoltage protector. It is designed to protect monolithic SLICs (Subscriber Line Interface Circuits) against overvoltages on the telephone line caused by lightning, a.c. power contact and induction. The TISP61521 limits voltages that exceed the SLIC supply rail voltage. The TISP61521 parameters are specified to allow equipment compliance with Bellcore GR-1089-CORE, Issue 1 and ITU-T recommendation K.20.

Overvoltage Protection for High Voltage Negative Rail Ringing SLICs
Dual Voltage-Programmable Protectors
    - Supports Battery Voltages Down to -150 V
    - Low 3 mA max. Gate Triggering Current
    - High 150 mA min. Holding Current
Rated for International Surge Wave Shapes