7442 datasheet(1/17 Pages) STMICROELECTRONICS

Nome de Peças	7442

Descrição Electrónicos	TONE CONTROL AND SURROUND DIGITALLY CONTROLLED AUDIO PROCESSOR

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TDA7442

TDA7442D

June 2004

1FEATURES

■

4 STEREO INPUTS

■

INPUT ATTENUATION CONTROL IN 0.5dB

STEP

■

TREBLE AND BASS CONTROL

■

TWO SURROUND MODE AVAILABLE WITH 4

SELECTABLE RESPONSES:

–MUSIC

– SIMULATED STEREO

■

TWO SPEAKER ATTENUATORS:

– 2 INDEPENDENT SPEAKER CONTROLS IN

1dB STEPS FOR BALANCE FACILITY

– INDEPENDENT MUTE FUNCTION

■

ALL FUNCTIONS PROGRAMMABLE VIA

SERIAL BUS

■

2 MONITOR OUTPUT (ONLY FOR TDA7442)

2DESCRIPTION

The TDA7442/42D is volume tone (bass and tre-

ble) balance (Left/Right) processors for quality au-

dio applications in TV and Hi-Fi systems.

It reproduces surround sound by using a program-

mable phase shifter. Control of all the functions is

accomplished by serial bus.

The AC signal setting is obtained by resistor net-

works and switches combined with operational

amplifiers.

Thanks to the BIPOLAR/CMOS Technology used,

Low Distortion, Low Noise and DC stepping are

obtained.

TONE CONTROL AND SURROUND

DIGITALLY CONTROLLED AUDIO PROCESSOR

Figure 2. Pin Connections (Top views)

L_IN3

L_IN4

MUXOUTL

IN(L)

MUXOUT(R)

BIN(R)

IN(R)

BOUT(R)

BIN(L)

1

3

2

4

5

6

7

8

9

BOUT(L)

LP

PS1

TREBLE(R)

TREBLE(L)

SCL

SDA

DIG-GND

CREF

23

22

21

20

19

17

18

16

15

D98AU948

10

11

12

13

14

28

27

26

25

24

R_IN3

R_IN2

R_IN1

L_IN1

L_IN2

VS

AGND

ROUT

LOUT

R_IN4

L-IN2

L-IN3

L-IN4

MUXOUT(L)

IN(L)

N.C.

MUXOUT(R)

IN(R)

BIN(R)

1

3

2

4

5

6

7

8

9

PS1

TREBLE-L

N.C.

DIGGND

TREBLE-R

SCL

SDA

CREF

VS

27

26

25

24

23

21

22

20

19

D01AU1247

10

11

12

13

14

32

31

30

29

28

R-IN2

R-IN1

MONITOR(L)

MONITOR(R)

L-IN1

AGND

R-OUT

L-OUT

R-IN4

R-IN3

BIN(L)

BOUT(L)

17

16

BOUT(R)

LP

18

15

SO28

SDIP32

Figure 1. Packages

Table 1. Order Codes

Part Number

Package

TDA7442

SDIP-32

TDA7442D

SO-28

TDA7442D013TR

Tape & Reel

SO-28

SDIP-32

REV. 2

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