GENERAL DESCRIPTION
The TEA1096 and TEA1096A are bipolar ICs intended for use in line powered telephone sets. They offer a speech/transmission function, listening-in and line monitoring facilities of the received line signal via the loudspeaker.

FEATURES
• Line Interface with:
    – active set impedance (adjustable)
    – voltage regulator with adjustable DC voltage
    – low voltage circuit for parallel operation
• Interface to peripheral circuits with:
    – supply VDD for microcontroller
    – stabilized supply voltage (VBB) which is: available for peripheral circuits adjustable (TEA1096 only)
    – Dual-Tone MultiFrequency (DTMF) signal input
    – power-down function for pulse dialling/flash
    – mute function to disable speech during dialling
• Microphone amplifier with:
    – symmetrical high impedance inputs
    – externally adjustable gain
    – AGC; line-loss compensation
    – dynamic limiter
    – microphone mute function
• Receiving amplifier with:
    – externally adjustable gain
    – confidence tone during dialling
    – double anti-sidetone circuit for long and short lines
    – AGC; line-loss compensation
    – earpiece protection by soft clipping.
• Listening-in circuit with:
    – loudspeaker amplifier
    – dynamic limiter to prevent distortion at any supply condition
    – volume control via a potentiometer
    – fixed gain of 35.5 dB
    – disable function
    – gain control input (TEA1096A only).

APPLICATIONS
• Line-powered telephone sets with listening-in/line monitoring function.