TDA7342

DIGITALLY CONTROLLED AUDIO PROCESSOR

INPUT MULTIPLEXER

- TWO STEREO AND ONE MONO INPUTS

- ONE QUASI DIFFERENTIAL INPUT

- SELECTABLE INPUT GAIN FOR OPTIMAL

ADAPTATION TO DIFFERENT SOURCES

FULLY

PROGRAMMABLE

LOUDNESS

FUNCTION

VOLUME CONTROL IN 0.3dB STEPS IN-

CLUDING GAIN UP TO 20dB

ZERO CROSSING MUTE, SOFT MUTE AND

DIRECT MUTE

BASS AND TREBLE CONTROL

FOUR SPEAKER ATTENUATORS

- FOUR INDEPENDENT SPEAKERS

CONTROL IN 1.25dB STEPS FOR

BALANCE AND FADER FACILITIES

- INDEPENDENT MUTE FUNCTION

ALL FUNCTIONS PROGRAMMABLE VIA SE-

RIAL I

DESCRIPTION

The audioprocessor TDA7342 is an upgrade of

the TDA731X audioprocessor family.

Due to a highly linear signal processing, using

CMOS-switching techniques instead of standard

bipolar multipliers, very low distortion and very

low noise are obtained. Several new features like

softmute, and zero-crossing mute are imple-

mented.

The soft Mute function can be activated in two

ways:

1 Via serial bus (Mute byte, bit D0)

2 Directly on pin 21 through an I/O line of the

microcontroller

Very low DC stepping is obtained by use of a

BICMOS technology.

November 1999

®

ORDERING NUMBER: TDA7342

TQFP 32

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