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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:

鈥?Independentattenuation control

鈥?Independentmute function

ALL FUNCTIONS PROGRAMMABLE VIA

I

2

CBUS

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.

BLOCK DIAGRAM

4.7K

100nF

LOUD_L

7

6

2

MUX

VOL

BASS

TREBLE

BIN_L

12

100nF

BOUT_L

11

SDIP24

ORDERING NUMBER:

TDA7434

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.

2.7nF

TRL

13

SPKR

ATT

SPKR

ATT

19

LEFT FRONT

IN1_L

IN2_L

17

LEFT REAR

MONO/MUTE

4

21

S BUS DECODER + LATCHES

22

SCL

SDA

IN2_R

IN1_R

VS

1

5

20

MUX

VOL

BASS

TREBLE

SPKR

ATT

SPKR

ATT

18

RIGHT FRONT

16

SUPPLY

24

GND

CREF

8

LOUD_R

100nF

10

BIN_R

9

BOUT_R

100nF

4.7K

14

TRR

2.7nF

RIGHT REAR

23

D95AU360A

August 1996

1/10

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

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