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7343 Datasheet

  • 7343

  • DIGITALLY CONTROLLED AUDIO PROCESSOR

  • 102.50KB

  • 14頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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TDA7343
DIGITALLY CONTROLLED AUDIO PROCESSOR
INPUT MULTIPLEXER
- TWO STEREO AND ONE MONO INPUTS
- 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 AND DIRECT
MUTE
SOFT MUTE CONTROLLED BY SOFTWARE
OR HARDWARE PIN
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 TDA7343 is an upgrade of the TDA7313
audioprocessor.
Thanks to the used BIPOLAR/CMOS technology,
very low distortion, low noise and DC-stepping
are obtained.
Due to a highly linear signal processing, using
DIP28
SO28
ORDERING NUMBER:
TDA7343 (DIP28)
TDA7343D (SO28)
CMOS-switching techniques instead of standard
bipolar multipliers, very low distortion and very
low noise are obtained Several new features like
softmute, zero-crossing mute and pause detector
are implemented.
The Soft Mute function can be activated in two
ways:
1 Via serial bus (bit D0, Mute Byte)
2 Directly on pin 22 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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