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TDA7449L датащи(PDF) 1 Page - STMicroelectronics

номер детали TDA7449L
подробное описание детали  LOW COST DIGITALLY CONTROLLED AUDIO PROCESSOR
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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TDA7449L
June 2004
1FEATURES
INPUT MULTIPLEXER
– 2 STEREO INPUTS
– SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTATION TO DIFFERENT SOURCES
ONE STEREO OUTPUT
VOLUME CONTROL IN 1.0dB STEPS
TWO SPEAKER ATTENUATORS:
– TWO INDEPENDENT SPEAKER CONTROL
IN 1.0dB STEPS FOR BALANCE FACILITY
– INDEPENDENT MUTE FUNCTION
ALL FUNCTION ARE PROGRAMMABLE VIA
SERIAL BUS
2DESCRIPTION
The TDA7449L is a volume control and balance
(Left/Right) processor for quality audio applica-
tions in TV systems.
Selectable input gain is provided. Control of all the
functions is accomplished by serial bus.
The AC signal setting is obtained by resistor net-
works and switches combined with operational
amplifiers.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are
obtained.
LOW COST
DIGITALLY CONTROLLED AUDIO PROCESSOR
Figure 2. Block Diagram
0/30dB
2dB STEP
MUXOUTL
VOLUME
VOLUME
MUXOUTR
SPKR ATT
LEFT
LOUT
SCL
SDA
DIG_GND
ROUT
D98AU868
I
2CBUS DECODER + LATCHES
100K
100K
G
L-IN1
L-IN2
100K
100K
R-IN1
R-IN2
G
INPUT MULTIPLEXER
+ GAIN
SPKR ATT
RIGHT
SUPPLY
CREF
AGND
VS
5
8
9
7
6
19
20
18
4
2
3
11
1
10
VREF
REV. 3
Figure 1. Package
Table 1. Order Codes
Part Number
Package
TDA7449L
DIP20
DIP20


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