DESCRIPTION
The audioprocessor TDA7437N 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 soft mute, and zero-crossing mute are implemented.The soft Mute function can be activated in two ways:

1 Via serial bus (Mute byte, bit D0)
2 Directly on pin 28 through an I/O line of the microcontroller

Very low DC stepping is obtained by use of a BICMOS technology.

■ INPUT MULTIPLEXER
   – FOUR STEREO, ONE MONO INPUT, AND ONE DIFFERENTIAL INPUT
   – SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTATION TO DIFFERENT SOURCES
■ FULLY PROGRAMMABLE LOUDNESS FUNCTION
■ VOLUME CONTROL IN 1dB STEPS INCLUDING GAIN UP TO 16dB
■ ZERO CROSSING MUTE, SOFT MUTE AND DIRECT MUTE
■ BASS AND TREBLE CONTROL
■ FOUR SPEAKER ATTENUATORS- FOUR
   INDEPENDENT SPEAKERS CONTROL IN 1dB STEPS FOR BALANCE AND FADER FACILITIES
■ PAUSE DETECTOR PROGRAMMABLE THRESHOLD
■ ALL FUNCTIONS PROGRAMMABLE VIA SERIAL I2C BUS