September 2013 Rev 3 1/20
1
TDA7342
Digitally controlled audio processor
Features
• 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 I
2
C bus
Description
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:
1. Via serial bus (Mute byte, bit D0)
2. Directly on pin 21 through an I/O line of the
microcontroller
Very low DC stepping is obtained by use of a
BICMOS technology.
Order codes
Part number Package Packing
TDA7342 LQFP32 Tray
TDA7342TR LQFP32 Tape and reel
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