L3281

LOW VOLTAGE TELEPHONE SPEECH CIRCUITS

PRELIMINARY DATA

OPERATION DOWN TO 1.6V / 6.5mA

DTMF & BEEP TONE INPUTS

EXTERNAL MUTING FOR EARPHONE AND

MICROPHONE

SUITABLE FOR DYNAMIC EARPHONE AND

DYNAMIC OR ELECTRET MICROPHONE

AGC CONTROL ON BOTH SENDING AND

RECEIVING

DESCRIPTION

The L3281 is an electronic speech circuit devel-

oped to replace hybrid circuits in telephone sets

that can be operated in parallel with other

phones.

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

June 1993

BLOCK DIAGRAM

DIP14

ORDERING NUMBERS:

L3281AB

L3281AD1

SO14

1/10