TDA7434

BASIC FUNCTION AUDIO PROCESSOR

TWO STEREO AND ONE MONO INPUTS

MUTE FUNCTION (SOFTWARE AND HARD-

WARE) CONTROLLED

VOLUME CONTROL IN 1dB STEP

BASS AND TREBLE CONTROL

FOUR SPEAKER ATTENUATORS:

– Independentattenuation control

– Independentmute function

ALL

FUNCTIONS

PROGRAMMABLE

VIA

I

FULLY PROGRAMMABLE LOUDNESS CON-

TROL

DESCRIPTION

The TDA7434 is a volume, tone (bass and treble)

balance (Left / Right) fader (Front / Rear) proces-

sor 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.

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

August 1996

IN1_L

SUPPLY

VS

GND

VOL

BASS

TREBLE

D95AU360A

S BUS DECODER + LATCHES

SPKR

ATT

SPKR

ATT

VOL

BASS

TREBLE

SPKR

ATT

SPKR

ATT

SCL

SDA

RIGHT FRONT

RIGHT REAR

LEFT REAR

LEFT FRONT

IN1_R

MUX

MUX

MONO/MUTE

IN2_L

IN2_R

12

11

13

6

2

4

1

5

20

24

10

9

14

19

17

21

22

18

16

23

BIN_L

BOUT_L

TRL

BIN_R

BOUT_R

TRR

CREF

100nF

100nF

4.7K

2.7nF

100nF

100nF

2.7nF

4.7K

LOUD_L

7

8

LOUD_R

BLOCK DIAGRAM

SDIP24

ORDERING NUMBER: TDA7434

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