TDA7342_06 Datasheet, PDF (1/20 Pages) STMicroelectronics – Digitally controlled audio processor

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 I²C bus
Description
The audioprocessor TDA7342 is an upgrade of
the TDA731X audioprocessor family.
LQFP32
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
TDA7342N
TDA7342NTR
Package
LQFP32
LQFP32
Packing
Tube
Tape and reel
November 2006
Rev 2
1/20
www.st.com
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