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:

– Independentattenuation control

– Independentmute function

ALL

FUNCTIONS

PROGRAMMABLE

VIA

I

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.

August 1996

IN_L

SUPPLY

VS

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

100nF

100nF

10

µF

2.7nF

4.7K

100nF

100nF

4.7K

2.7nF

TRL

BOUTL

BINL

LOUD_L

11

9

10

6

16

14

18

19

15

13

12

7

8

5

1

3

4

2

17

20

TRR

BOUTR

LOUD_R

BINR

CREF

68nF

68nF

BLOCK DIAGRAM

SO20

ORDERING NUMBER: TDA7432D

1/10