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廬

TDA7433

BASIC FUNCTION AUDIO PROCESSOR

TWO STEREO AND ONE MONO INPUTS

CONTROLLED

MUTE FUNCTION (SOFTWARE AND HARD-

WARE)

VOLUME CONTROL IN 1dB STEP

FOUR SPEAKER ATTENUATORS:

鈥?Independentattenuation control

鈥?Independentmute function

ALL FUNCTIONS PROGRAMMABLE VIA

I

2

CBUS

DESCRIPTION

The TDA7433 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.

BLOCK DIAGRAM

4.7K

100nF

BINL

10

6

3

MUX

VOL

BASS

TREBLE

100nF

BOUTL

9

2.7nF

SO20

ORDERING NUMBER:

TDA7433D

Thanks to the advanced BIPOLAR/CMOS Tech-

nology, the external components have been re-

duced.

TRL

11

SPKR

ATT

SPKR

ATT

16

LEFT FRONT

IN1_L

IN2_L

14

LEFT REAR

MONO IN/MUTE

4

18

S BUS DECODER + LATCHES

19

SCL

SDA

IN2_R

IN1_R

VS

2

5

17

MUX

VOL

BASS

TREBLE

SPKR

ATT

SPKR

ATT

15

RIGHT FRONT

13

SUPPLY

20

GND

1

CREF

BINR

100nF

8

7

BOUTR

100nF

4.7K

12

TRR

2.7nF

RIGHT REAR

D95AU354A

November 1999

1/10

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