TEA1085A Datasheet (NXP) - Line-powered Telephone Listening-in

TEA1085A, Line-powered Telephone Listening-in

The TEA1085 and TEA1085A are bipolar ICs which have been designed for use in line-powered telephone sets and provide a listening-in facility for the received line signal via a loudspeaker.

Nearly all the line current can be used for powering the loudspeaker.

The circuits incorporate a supply circuit

TEA1085A Features

* Internal supply optimum current split-up - low constant current (adjustable) in transmission IC - nearly all line current available for listening-in adjustable supply voltage

* Loudspeaker amplifier dynamic limiter providing low distortion and the highest possible output power SE o