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廬

TDA7339

3 BAND DIGITAL CONTROLLED AUDIO PROCESSOR

PRODUCT PREVIEW

THREE STEREO INPUT

ONE RECORD OUTPUT

ONE STEREO OUTPUT

TWO INDEPENDENT VOLUME CONTROL IN

1.0dB STEPS

TREBLE, MIDDLE AND BASS CONTROL IN

1.0dB STEPS

ALL FUNCTIONS PROGRAMMABLE VIA SE-

RIAL I

2

CBUS

DESCRIPTION

The TDA7339 is a volume and tone (bass , mid-

dle and treble) processor for quality audio appli-

cation in car radio and Hi-Fi system.

Control is accomplished by serial I

2

C bus micro-

processor interface.

The AC signal setting is obtained by resistor net-

works and switches combined with operational

amplifiers.

BLOCK DIAGRAM

DIP28

ORDERING NUMBER:

TDA7339

Thanks to the used BIPOLAR/MOS Technology,

Low Distortion, Low Noise and Low DC stepping

are obtained.

R1

2.7K

C7

5.6nF

3x

2.2碌F

C1

C2

C3

REC OUT(L) TREBLE(L)

2

4

5

MUTE

8

1st VOL

TREBLE

MIDDLE

3

C9

18nF

M IN(L)

6

C10

22nF

M OUT(L)

7

9

C13

100nF

B IN(L)

R3

2.7K

C14

100nF

B OUT(L)

10

2nd VOL

BASS

SOFTMUTE

IN1(L)

IN2(L)

IN3(L)

12

OUT L

14

13

SERIAL BUS DECODE & LATCHES

18

15

1st VOL

TREBLE

MIDDLE

BASS

2nd VOL

SOFTMUTE

17

11

SCL

SDA

ADDR

DIG.GND

CMUTE

C

SM

22nF

OUT R

BUS

MULTIPLEXER

IN1(R)

IN2(R)

IN3(R)

C4

C5

C6

3x

2.2碌F

27

25

24

MUTE

1

V

S

SUPPLY

16

ANAL.GND

CREF

28

21

26

M IN(R)

C11

18nF

23

M OUT(R)

C12

22nF

R2

2.7K

22

20

B IN(R)

C15

100nF

R4

5.6K

19

B OUT(R)

C16

100nF

D94AU067C

REC OUT(R) TREBLE(R)

C

REF

10碌F

C8

5.6nF

July 1999

This is preliminary information on a new product now in development. Details are subject to change without notice.

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