TDA7432
BASIC FUNCTION AUDIO PROCESSOR
ONE STEREO AND ONE MONO INPUTS
MUTE FUNCTION (SOFTWARE AND HARD-
WARE) CONTROLLED
VOLUME CONTROL IN 1dB STEP
BASS AND TREBLE CONTROL IN 2dB STEP
FULLY PROGRAMMABLE LOUDNESS CON-
TROL
FOUR SPEAKER ATTENUATORS:
– Independent attenuation control
– Independent mute function
ALL FUNCTIONS PROGRAMMABLE VIA
I
2
CBUS
DESCRIPTION
The TDA7432 is a volume, tone (bass and treble)
balance (Left/Right) processor for quality audio
applications in car radio and Hi-Fi systems.
Control is accomplished by serial bus microproc-
essor interface.
The AC signal setting is obtained by resistor net-
works and switches combined with operational
amplifiers.
Thanks to the advanced BIPOLAR/CMOS Tech-
nology, the external components have been re-
duced.
September 2003
®
IN_L
SUPPLY
V
S
GND
VOL
+ LOUD
BASS TREBLE
D95AU357A
S BUS DECODER + LATCHES
SPKR
ATT
SPKR
ATT
VOL
+ LOUD
BASS
TREBLE
SPKR
ATT
SPKR
ATT
SCL
SDA
RIGHT FRONT
RIGHT REAR
LEFT REAR
LEFT FRONT
MUX
MUX
MONO_IN/MUTE
IN_R
100nF100nF
10µF 2.7nF
4.7K
100nF100nF
4.7K
2.7nF
TRLBOUTLBINLLOUD_L
119106
16
14
18
19
15
13
127851
3
4
2
17
20
TRRBOUTRLOUD_R BINRCREF
68nF
68nF
BLOCK DIAGRAM
SO20
ORDERING NUMBER:
TDA7432D
1/10
Obsolete Product(s) - Obsolete Product(s)
