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TDA7309 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. TDA7309
Description  DIGITAL CONTROLLED STEREO AUDIO PROCESSOR WITH LOUDNESS
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7309 Datasheet(HTML) 1 Page - STMicroelectronics

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TDA7309
DIGITAL CONTROLLED STEREO AUDIO PROCESSOR
WITH LOUDNESS
INPUT MULTIPLEXER:
3 STEREO INPUTS
RECORD OUTPUT FUNCTION
LOUDNESS FUNCTION
VOLUME CONTROL IN 1dB STEPS
INDEPENDENT LEFT AND RIGHT VOLUME
CONTROL
SOFT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL I
2C BUS
DESCRIPTION
The TDA7309 is a control processor with inde-
pendent left and right volume control for quality
audio applications. Selectable external loudness
and soft mute functions are provided.
Control is accomplished by serial I
2C bus micro-
processor interface.
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 Low DC stepping
are obtained.
September 1997
17
18
13
14
11
INPUT
SELECTOR
LEFT
INPUTS
RIGHT
INPUTS
SUPPLY
16
7
15
VOLUME +
LOUDNESS
SOFT
MUTE
19
LOUD(L)
22
µF
CREF
12
LOUD(R)
MUTE
MUTE
6
4
5
8
9
2
OUT
LEFT
SCL
SDA
DIGGND
OUT
RIGHT
ADDR
D93AU045A
BUS
SERIAL BUS DECODER + LATCHES
20
3 x
2.2
µF
3 x
2.2
µF
VOLUME +
LOUDNESS
AGND
VS
3
CSM
100nF
100nF
TDA7309
10
Recout(R)
1
Recout(L)
BLOCK DIAGRAM
DIP20
SO20
ORDERING NUMBER:
TDA7309
TDA7309D
1/12


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