TEA7089A - ST Microelectronics

TEA7089A LOW-RANGE PHONE DEDICATED CHIP

The TEA7089A is a Telephone Analog Front End device, TAFE, which integrates the three basic functions of a standard telephone set : - Speech network, - DTMF generator, - Ringer generator on buzzer. A complete telephone set can be designed using TEA7089A associated with a low cost microcontroller. June 1998 VCC GND IVLS VS RES VRING BUZ 7089A-01.EPS VL VM.

Features

7089A is a Telephone Analog Front End device, TAFE, which integrates the three basic functions of a standard telephone set : - Speech network, - DTMF generator, - Ringer generator on buzzer. A complete telephone set can be designed using TEA7089A associated with a low cost microcontroller. June 1998 VCC GND IVLS VS RES VRING BUZ 7089A-01.EPS VL VMC GREC EAR+ EAR- 1/17 TEA7089A SPEECH The speech network includes : - a low noise transmit channel suitable for any kind of microphone transducer. Softclipping on transmit line signal is provided by the chip. - a low noise receive channel with.