description
The TISP61089A 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 TISP61089A limits voltages that exceed the SLIC supply rail voltage. The TISP61089A parameters are specified to allow equipment compliance with Bellcore GR-1089-CORE, Issue 1.
The SLIC line driver section is typically powered from 0 V (ground) and a negative voltage in the region of -10 V to -100 V. The protector gate is connected to this negative supply. This references the protection (clipping) voltage to the negative supply voltage. As the protection voltage will then track the negative supply voltage the overvoltage stress on the SLIC is minimised.

● Dual Voltage-Programmable Protectors
   - Wide 0 to -110 V Programming Range
   - Low 5 mA max. Gate Triggering Current
   - High 150 mA min. Holding Current
● Also Rated for ITU-T 10/700 impulses
● Surface Mount and Through-Hole Options
   - TISP61089AP for Plastic DIP
   - TISP61089AD for Small-Outline
   - TISP61089ADR for Small-Outline Taped and Reeled