Audio Processor 32-Pin TQFP

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 implemented. The soft Mute function can be activated in two ways:Via serial bus (Mute byte, bit D0)Directly on pin 21 through an I/O line of the microcontrollerVery low DC stepping is obtained by use of a BICMOS technology.

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 including 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 serial I²C bus