TDA7343

DIGITALLY CONTROLLED AUDIO PROCESSOR

INPUT MULTIPLEXER

- TWO STEREO AND ONE MONO INPUTS

- 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

AND

DIRECT

MUTE

SOFT MUTE CONTROLLED BY SOFTWARE

OR HARDWARE PIN

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 TDA7343 is an upgrade of the TDA7313

audioprocessor.

Thanks to the used BIPOLAR/CMOS technology,

very low distortion, low noise and DC-stepping

are obtained.

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, zero-crossing mute and pause detector

are implemented.

The Soft Mute function can be activated in two

ways:

1 Via serial bus (bit D0, Mute Byte)

2 Directly on pin 22 through an I/O line of the

microcontroller

Very low DC stepping is obtained by use of a

BICMOS technology.

November 1999

®

ORDERING NUMBER: TDA7343 (DIP28)

TDA7343D (SO28)

DIP28

SO28

1/14