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TDA7464

DIGITALLY CONTROLLED AUDIO PROCESSOR WITH

SRS SURROUND SOUND AND VOICE CANCELLER

The Device incorporates the SRS

(Sound Retrieval System) under

licence from SRS Labs, Inc.

4 STEREO INPUTS

INPUT ATTENUATION CONTROL IN 0.5dB

STEP

TREBLE MIDDLE AND BASS CONTROL

VOICE CANCELLER IS AVAILABLE

STEREO SRS SURROUND SOUND WITH

CENTER & SPACE CONTROL IS AVAILABLE

THREE STANDARD SURROUND MODES

ARE AVAILABLE:

- MUSIC IN 4 DIFFERENT SELECTABLE

RESPONSES

- MOVIE AND SIMULATED IN 256

DIFFERENT SELECTABLE RESPONSES

2 SPEAKERS OUTPUTS

- INDEPENDENT ATTENUATORS IN 1dB

STEP FOR BALANCE FACILITY

- ZERO CROSSING ATTENUATION AVAILABLE

- INDEPENDENT MUTE FUNCTION

2 RECORD OUTPUTS

- INDEPENDENT ATTENUATORS IN 1dB

STEP FOR BALANCE FACILITY

- MUX AVAILABLE FORPROCESSES SIGNAL

SELECTION

- INDEPENDENT MUTE FUNCTION

ALL FUNCTIONS PROGRAMMABLE VIA SE-

RIAL BUS

TQFP44

ORDERING NUMBER:

TDA7464

PIN CONNECTION

R_IN4

R_IN3

R_IN2

CREF

44 43 42 41 40 39 38 37 36 35 34

LP1

HP1

HP2

NETW1

NETW2

VAR_L

BASSO_L

VAR_R

BASSO_R

BASS_LO

BASS_LI

1

2

3

4

5

6

7

8

9

10

11

12 13 14 15 16 17 18 19 20 21 22

33

32

31

30

29

28

27

26

25

24

23

R_IN1

VREFOUT

L_IN1

L_IN2

L_IN3

L_IN4

RECOUT_L

RECOUT_R

L_OUT

R_OUT

DIG_GND

DESCRIPTION

The TDA7464 is a volume tone (bass middle and

treble) balance (Left/Right) processors with stereo

SRS and voice canceller for quality audio applica-

tions in car radio, Hi-Fi, TV systems.

It reproduces SRS (Sound Retrieval System)

sound by external components and surround

sound by using phase shifters and a signal ma-

trix. The AC signal setting is obtained by resistor

networks and switches combined with operational

amplifiers according to the SRS laboratories

MIDDLE_LO

BASS_RI

MIDDLE_RI

TREBLE_L

BASS_RO

MIDDLE_RO

TREBLE_R

MIDDLE_LI

AGND

SDA

SCL

LPVC

D96AU483C

PS1

PS2

PS3

PS4

LP

specification. Control of all the functions is ac-

complished by serial bus.

Thanks to the used BIPOLAR/CMOS Technology,

Low Distortion, Low Noise and DC stepping are

obtained.

V

S

February 1998

1/21

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