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