TSIxxB1

2/9

PTC

TYPICAL APPLICATION

Telecom terminals have a diode bridge for polarity

guard, located at the line interface stage. They

also have above this diode bridge one crowbar

protection device that is mandatory to prevent

atmospheric effects and AC mains disturbances

from damaging the electronic circuitry that follows

the diode bridge.

ST proposes a one chip device that includes both

protection and diode bridge. This is the concept of

the TSIxxB1 devices.

Fig. 1 : The various uses of the TSIxxB1 in a conventional telecom network