TEA1096AT

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.