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TDA7342 Datasheet

  • TDA7342

  • DIGITALLY CONTROLLED AUDIO PROCESSOR

  • 14頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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TDA7342
DIGITALLY CONTROLLED AUDIO PROCESSOR
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 IN-
CLUDING 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 SE-
RIAL I
2
CBUS
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
TQFP 32
ORDERING NUMBER:
TDA7342
bipolar multipliers, very low distortion and very
low noise are obtained. Several new features like
softmute, and zero-crossing mute are imple-
mented.
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.
November 1999
1/14

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