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L3280

LOW VOLTAGE TELEPHONE SPEECH CIRCUIT

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ADVANCE DAT A

OPERATION DOWN TO 1.3 V/5 mA

DTMF & BEEP TONE INPUTS

EXTERNAL MUTING FOR EARPHONE AND

MICROPHONE

MUTE TURNS ON BEEP TONE & DTMF IN-

PUTS AND TURNS OFF EARPHONE & MI-

CROPHONE

SUITABLE FOR DYNAMIC OR PIEZO EAR-

PHONES AND PIEZO, DYNAMIC OR ELEC-

TRET MICROPHONES

DIP14

DESCRIPTION

The L3280is a brand new low voltage speech circuit

designed to replace hybrid circuits in telephonesets.

It is designed for sets that may be operated in par-

allel. It features both DTMF input and Beep tone in-

put ; ALC on send and receive and muting input.

Various DC - characteristics can be programmed at

pin 14 replacing testing resistor (43鈩? with proper

network value.

PIN CONNECTION

(top view)

ORDERING NUMBER :

L3280AB

June 1993

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

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