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.

■ 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 INCLUDING 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 BALANCEAND FADER FACILITIES

- INDEPENDENT MUTE FUNCTION

■ ALL FUNCTIONS PROGRAMMABLE VIA SERIAL I2 CBUS