TEA1111A Datasheet - NXP

TEA1111A earpiece volume controller

The TEA1111A is a bipolar integrated circuit that performs all speech and line interface functions required in fully electronic telephone sets. It performs electronic switching between speech and dialling. The IC operates at a line voltage down to 1.5 V DC (with reduced performance) to facilitate th.

TEA1111A Features

* Low DC line voltage; operates down to 1.5 V (excluding voltage drop across external polarity guard)

* Line voltage regulator with adjustable DC voltage

* 3.25 V regulated strong supply point for peripheral circuits compatible with:

* Speech mode

* Ringer mod

TEA1111A_PhilipsSemiconductors.pdf