TDA7465

DIGITALLY CONTROLLED AUDIO PROCESSOR WITH

SRS SURROUND SOUND AND VOICE CANCELLER

1 STEREO INPUT AND 1 MIXER INPUT
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

REAR OUTPUT IS AVAILABLE TO DRIVE

EXTRA SURROUND SPEAKERS

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 FOR PROCESSES SIGNAL

SELECTION

- INDEPENDENT MUTE FUNCTION

ALL FUNCTIONS PROGRAMMABLE VIA SE-

RIAL BUS

ADDRESS PIN AVAILABLE

DESCRIPTION
The TDA7465 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
specification. An Extra Mix Input is available to

connect microphone for KARAOKE feature.
Control of all the functions is accomplished by se-
rial bus.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are
obtained.

May 1997

ORDERING NUMBER: TDA7465

SDIP42

LP1

HP1

HP2

VAR_L

VAR_R

BASSO_L

BASSO_R

BASS_LO

6
7

R_OUT

L_OUT

RECOUT_R

NETW1
RECOUT_L

NETW2

VREFOUT

MIX

L_IN

37
36

D96AU479B

10
11

41
40

PS4
PS3

PS2

PS1

R_IN

LPVC

REAR_IN

REAR_OUT

CREF

BASS_LI

BASS_RO

BASS_RI

MIDDLE_LI

MIDDLE_LO

MIDDLE_RO

MIDDLE_RI

15
16

TREBLE_R

TREBLE_L

AGND

SDA

ADDR

SCL

DIG_GND

19
20

PIN CONNECTION

The Device incorporates the SRS
(Sound Retrieval System) under
licence from SRS Labs, Inc.

1/20

L-IN

RLP1

L-R

0.22

SUPPLY

AGND

CREF

TREBLE

18nF

MIDDLE

2.7K

MIDDLE-LI

MIDDLE-LO

22nF

BASS

BASS-LI

MUTE

D96AU480C

MUTE

BUS

DECODER

LATCHES

SPKR

ATT

REC

ATT

TREBLE

MIDDLE

BASS

18nF

22nF

2.7K

5.6nF

MUTE

SPKR

ATT

MUTE

REC

ATT

SCL

SDA

DIG_GND

R-OUT

RECOUT-R

L-OUT

RECOUT-L

RHP1

LP1

HP1

HP2

5.6nF

680nF

PS1

90Hz

100nF

PS1

RPS1

SIM

MOVIE/

MUSIC

PS2

4KHz

PS3

400Hz

PS4

400Hz

4.7nF

PS2

RPS2

22nF

PS3

RPS3

22nF

PS4

RPS4

MOVIE/

SIM

MIXING

AMP

LPF

9KHz

EFFECT

CONTROL

MIXING

AMP

1.2nF

MIDDLE-RI

MIDDLE-RO

LPF

100nF

LPVC

TREBLE-R

79dB

CONTROL

5.6nF

TREBLE-L

100nF

5.6K

100nF

BASS-LO

100nF

5.6K

BASS-RI

BASS-RO

79dB

CONTROL

79dB

CONTROL

2.2

BASSO-R

VAR-R

30K

2.2

BASSO-L

VAR-L

30K

79dB

CONTROL

0.22

31.5dB

control

R-IN

31.5dB

control

0.47

NETW2

NETW1

VOICE

SURR

SRS

SURR

REAR

FIX

3BAND

SURR

REAR

FIX

3BAND

FIX

VAR

FIX

VAR

50K

STEREO

SRS

CENTER

SPACE

4.42K

0.47

1.5K

32.4K

130K

47.5K

4.7nF

3.74K

VREFOUT

REF

OFF

FIX

SURR

SRS

FIX

100K

MIX

REAR_IN

REAR_OUT

2.2

4.7

2.7K

4.7

2.7K

N.B.

50K

MIX

ADDR

BLOCK DIAGRAM

TDA7465

2/20

THERMAL DATA

Symbol

Description

Value

Unit

th j-pins

Thermal Resistance Junction-pins

Ma x.

C/W

QUICK REFERENCE DATA

Symbol

Parameter

Min.

Typ.

Max.

Unit

Supply Voltage

10.2

Max. input signal handling

Vrms

THD

Total Harmonic Distortion V = 1Vrms f = 1KHz

0.01

0.1

S/N

Signal to Noise Ratio V

out

= 1Vrms (mode = OFF)

106

Channel Separation f = 1KHz

Input Attenuation Control (0.5dB)

-31.5

Treble Control

(2db step)

-14

+14

Middle Control (2db step)

-14

+14

Bass Control (2dB step)

-14

+14

Balance Control

1dB step (L

CH,

)

-79

Mute Attenuation

100

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

Operating Supply Voltage

amb

Operating Ambient Temperature

-10 to 85

stg

Storage Temperature Range

-55 to +150

ELECTRICAL CHARACTERISTICS (refer to the test circuit T

amb

= 25

C, V

= 9V, R

= 10K

= 1Vrms; R

= 600

, all controls flat (G = 0dB), Effect Ctrl = -6dB, MODE = OFF; f = 1KHz

unless otherwise specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

SUPPLY

Supply Voltage

10.2

Supply Current

SVR

Ripple Rejection

/ R

CH out

, Mode = OFF

INPUT STAGE

Input Resistance

37.5

62.5

Clipping Level

THD = 0.3%

2.5

Vrms

RANGE

Attenuation Range

31.5

VMIN

Min. Attenuation

-1

VMAX

Max. Attenuation

31.5

STEP

Step Resolution

-1

0.5

DC Steps

Adjacent att. step

-3

VO1

Voice Canceller Output 1

= R

, R

= ON,

mix

= 0V FIX, 0dB attenuation

VO2

Voice Canceller Output 2

= R

= 0V V

mix

= 1V

rms

FIX,

0dB attenuation

-1

TDA7465

3/20

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

SUPPLY

VO3

Voice Canceller Output 3

= -R

, V

mix

= 0V FIX,

0dB attenuation

LPV

Low Pass Filter Resistance

MIX

Input Impedance

100

125

BASS CONTROL

Control Range

Max. Boost/cut

+12.0

+14.0

+16.0

STEP

Step Resolution

Internal Feedback Resistance

MIDDLE CONTROL

Control Range

Max. Boost/cut

+12.0

+14.0

+16.0

STEP

Step Resolution

Internal Feedback Resistance

18.75

31.25

TREBLE CONTROL

Control Range

Max. Boost/cut

+13.0

+14.0

+15.0

STEP

Step Resolution

STANDARD SURROUND SOUND MATRIX

TEST CONDITION (Phase Resistor Selection D0=0, D1=1, D2=0. D3=1, D4=0, D5=1, D6=0, D7=1

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

OFF

In-phase Gain (OFF)

Mode OFF, Input signal of
1kHz, 1.4 V

p-p

, R

out

-1

GOFF

LR In-phase Gain Difference
(OFF)

Mode OFF, Input signal of
1kHz, 1.4 V

p-p

out

, L

out

-1

MOV

In-phase Gain (Movie)

Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V

p-p

out

, L

out

GMOV

LR In-phase Gain Difference
(Movie)

Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V

p-p

out

) (L

out

)

MUS

In-phase Gain (Music)

Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V

p-p

out

), (L

out

)

GMUS

LR In-phase Gain Difference
(Music)

Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V

p-p

out

) - (L

out

)

MON1

Simulated L Output 1

Simulated Mode, Effect Ctrl = -6dB
Input signal of 250Hz,
1.4 V

p-p

, R

and L

out

4.5

MON2

Simulated L Output 2

Simulated Mode, Effect Ctrl = -6dB
Input signal of 1kHz,
1.4 V

p-p

, R

and L

out

4.0

MON3

Simulated L Output 3

Simulated Mode, EffectCtrl = -
6dB
Input signal of 3.6kHz,
1.4 V

p-p

, R

and L

out

7.0

TDA7465

4/20

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

MON1

Simulated R Output 1

Simulated Mode, Effect Ctrl = -6dB
Input signal of 250Hz,
1.4 V

p-p

, R

and L

out

4.5

MON2

Simulated R Output 2

Simulated Mode, Effect Ctrl = -6dB
Input signal of 1kHz,
1.4 V

p-p

, R

and L

out

3.8

MON3

Simulated R Output 3

Simulated Mode, Effect Ctrl = -6dB
Input signal of 3.6kHz,
1.4 V

p-p

, R

and L

out

LP1

Low Pass Filter Resistance

7.5

12.5

HPI

High Pass Filter Resistance

LPF

LP Pin Impedance

7.5

12.5

REARIN

Rear Input Resistance

D6 = 0

37.5

62.5

REAROUT

Rear Output Resistance

D6 = 0

OUT

DC Rear Voltage Level

D6 = 0

4.5

STANDARD SURROUND SOUND EFFECT CONTROL

RANGE

Control Range

- 21

- 6

STEP

Step Resolution

SURROUND SOUND MATRIX PHASE

PS10

Phase Shifter 1: D1 = 0, D0 = 0

8.8

11.8

14.8

PS11

Phase Shifter 1: D1 = 0, D0 = 1

10.6

14.1

17.6

PS12

Phase Shifter 1: D1 = 1, D0 = 0

13.4

17.9

22.4

PS13

Phase Shifter 1: D1 = 1, D0 = 1

37.3

46.6

PS20

Phase Shifter 2: D3 = 0, D2 = 0

4.2

5.6

PS21

Phase Shifter 2: D3 = 0, D2 = 1

5.1

6.8

8.5

PS22

Phase Shifter 2: D3 = 1, D2 = 0

6.3

8.4

10.5

PS23

Phase Shifter 2: D3 = 1, D2 = 1

13.7

18.3

22.9

PS30

Phase Shifter 3: D5 = 0, D4 = 0

12.1

15.1

PS31

Phase Shifter 3: D5 = 0, D4 = 1

10.9

14.5

18.1

PS32

Phase Shifter 3: D5 = 1, D4 = 0

13.6

18.1

22.6

PS33

Phase Shifter 3: D5 = 1, D4 = 1

29.3

39.1

48.9

PS40

Phase Shifter 4: D7 = 0, D6 = 0

12.1

15.1

SRS SURROUND SOUND MATRIX

CENTER

SRS Control Range

-31

Step

Center Step Resolution

SPACE

SRS Space Control Range

-31

Step

Space Step Resolution

ERSP1

Perspective 1

Input Signal of 125Hz
SPACE = 0dB, CENTER = MUTE
R

= GND; Li

OUT

ERSP2

Perspective 2

Input Signal of 2.15KHz
SPACE = 0dB, CENTER = MUTE
R

= GND; Li

OUT

L+R

L+ R SRS Curve

SPACE = MUTE, CENTER =0dB
R

= GND; Li

OUT

-8.5

TDA7465

5/20

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

SPEAKER & RECORD ATTENUATORS

range

Control Range

STEP

Step Resolution

0.5

1.5

Attenuation set error

Av = 0 to -20dB

-1.5

1.5

Av = -20 to -79dB

-3

DC Steps

Adjacent att. steps

-3

MUTE

Output Mute Condition

100

VAR

Input Impedance

22.5

37.5

SPEAKER ATTENUATORS

Zero CrossingThreshold

D7 = 0

AUDIO OUTPUTS

O(OFF)

Output Noise (OFF)

Output Mute, Flat
B

= 20Hz to 20KHz

4
5

Vrms

O(MOV)

Output Noise (Movie) Standard
Surround Sound

Mode =Movie ,
B

= 20Hz to 20KHz

Vrms

O(MUS)

Output Noise (Music) Standard
Surround Sound

Mode = Music ,
B

= 20Hz to 20KHz,

Vrms

O(SIM)

Output Noise (Simulated)
Standard Surround Sound

Mode = Simulated,
B

= 20Hz to 20KHz

Vrms

O(SRS)

Output Noise (SRS)
Surround Sound

= 20Hz to 20KHz

Vrms

Distorsion

Av = 0 ; V

= 1Vrms

0.01

0.1

Channel Separation

OCL

Clipping Level

d = 0.3%

2.5

Vrms

OUT

Output Resistance

OUT

DC Voltage Level

3.8

BUS INPUTS

Input Low Voltage

Input High Voltage

Input Current

-5

Output Voltage SDA
Acknowledge

= 1.6mA

0.4

TDA7465

6/20

C BUS INTERFACE

Data transmission from microprocessor to the
TDA7465 and viceversa takes place through the
2 wires I

C BUS interface, consisting of the two

lines SDA and SCL (pull-up resistors to positive
supply voltage must be connected).

Data Validity
As shown in fig. 3, the data on the SDA line must
be stable during the high period of the clock. The
HIGH and LOW state of the data line can only
change when the clock signal on the SCL line is
LOW.

Start and Stop Conditions
As shown in fig.4 a start condition is a HIGH to
LOW transition of the SDA line while SCL is
HIGH. The stop condition is a LOW to HIGH tran-
sition of the SDA line while SCL is HIGH.

Byte Format
Every byte transferred on the SDA line must con-
tain 8 bits. Each byte must be followed by an ac-

knowledge bit. The MSB is transferred first.

Acknowledge
The master (

P) puts a resistive HIGH level on the

SDA line during the acknowledge clock pulse (see
fig. 5). The peripheral (audioprocessor) that ac-
knowledges has to pull-down (LOW) the SDA line
during this clock pulse.
The audioprocessor which has been addressed
has to generate an acknowledge after the recep-
tion of each byte, otherwise the SDA line remains
at the HIGH level during the ninth clock pulse
time. In this case the master transmitter can gen-
erate the STOP information in order to abort the
transfer.

Transmission without Acknowledge
Avoiding to detect the acknowledge of the audio-
processor, the

P can use a simpler transmission:

simply it waits one clock without checking the
slave acknowledging, and sends the new data.
This approach of course is less protected from
misworking.

Figure 3: Data Validity on the I

CBUS

Figure 4: Timing Diagram of I

CBUS

Figure 5: Acknowledge on the I

CBUS

TDA7465

7/20

SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:

A start condition (S)
A chip address byte, containing the TDA7465

address
A subaddress bytes
A sequence of data (N byte + achnowledge)
A stop condition (P)

ACK = Achnowledge
S = Start
P = Stop
A = Address
B = Auto Increment

ACK

DATA

ACK

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D95AU226A

DATA

SUBADDRESS

DATA 1 to DATA n

EXAMPLES

No Incremental Bus
The TDA7465 receives a start condition, the cor-

rect chip address, a subaddress with the MSB = 0
(no incremental bus), N-data (all these data con-
cern the subaddress selected), a stop condition.

ACK

DATA

ACK

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D95AU306

SUBADDRESS

DATA

D2 D1 D0

Incremental Bus

The TDA7465 receives a start condition, the cor-
rect chip address, a subaddress with the MSB = 1
(incremental bus): now it is in a loop condition
with an autoincrease of the subaddress whereas

SUBADDRESS from "1XXX1010" to "1XXX1111"
of DATA are ignored.
The DATA 1 concerns thesubaddress sent, and
the DATA 2 concerns the subaddress sent plus
one in the loop etc. and, at the end, it receives the
stop condition.

ACK

DATA

ACK

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D95AU307

SUBADDRESS

DATA 1 to DATA n

D2 D1 D0

TDA7465

8/20

MSB

LSB

INPUT ATTENUATION

0.5 dB STEPS

-0.5

-1

-1.5

-2

-2.5

-3

-3.5

4 dB STEPS

-4

-8

-12

-16

-20

-24

-28

INPUT ATTENUATION = 0

-31.5dB

INPUT ATTENUATION SELECTION

MSB

LSB

SUBADDRESS

INPUT ATTENUATION

SURROUND & OUT & EFFECT
CONTROL

PHASE RESISTOR

BASS

MIDDLE & TREBLE

SPEAKER ATTENUATION "L"

SPEAKER ATTENUATION "R"

RECORD ATTENUATION "L"

RECORD ATTENUATION"R"

VOICE CANCELLER & REC OUT

SRS / SPACE ATTENUATION

SRS / CENTER ATTENUATION

B = 1 INCREMENTAL BUS; ACTIVE

B = 0 NO INCREMENTAL BUS;
X = DONT' CARE

The first byte (subaddress)

DATA BYTES (Address = 80(HEX) [82(HEX) if ADDRESS pin is connected to V

]

FUNCTION SELECTION:

TDA7465

9/20

MSB

LSB

SURROUND MODE

SIMULATED

MUSIC

OFF

MOVIE

OUT

VAR

FIX

EFFECT CONTROL

-6

-7

-8

-9

-10

-11

-12

-13

-14

-15

-16

-17

-18

-19

-20

-21

PHASE RESISTOR SELECTION

MSB

LSB

SURROUND PHASE

RESISTOR

PHASE SHIFT 1 (K

)

PHASE SHIFT 2 (K

)

PHASE SHIFT 3 (K

)

PHASE SHIFT 4 (K

)

STANDARD SURROUND SELECTION

TDA7465

10/20

MIDDLE & TREBLE SELECTION

MSB

LSB

MIDDLE

2 dB STEPS

-14

-12

-10

-8

-6

-4

-2

TREBLE

2 dB STEPS

-14

-12

-10

-8

-6

-4

-2

TDA7465

12/20

LEFT CHANNEL SPEAKER ATTENUATION SELECTION

MSB

LSB

SPEAKER/RECORD ATT

1 dB STEPS

-1

-2

-3

-4

-5

-6

-7

8 dB STEPS

-8

-16

-24

-32

-40

-48

-56

-64

-72

MUTE

LEFT & RIGHT CHANNELS BOTH

MSB

LSB

ZERO CROSS ATT. MODE

1 dB STEPS

OFF

X = DON' TCARE
SPEAKER/RECORD ATTENUATION = 0dB

-79dB

TDA7465

13/20

RECORD AND RIGHT CHANNEL SPEAKER ATTENUATION SELECTION

MSB

LSB

SPEAKER/RECORD ATT

1 dB STEPS

-1

-2

-3

-4

-5

-6

-7

8 dB STEPS

-8

-16

-24

-32

-40

-48

-56

-64

-72

MUTE

X = DON'T CARE
SPEAKER/RECORD ATTENUATION = 0dB

-79dB

VOICE CANCELLER RECOUT L & R SELECTION

MSB

LSB

VOICE CANCELLER

OFF

REC OUT "L"

VAR 1 (3BAND)

VAR 2 (SURR)

VAR 3 (REAR)

FIX

REC OUT "R"

VAR 1(3BAND)

VAR 2 (SURR)

VAR 3 (REAR)

FIX

MIX SWITCH

MIX PIN ACTIVE

NO MIX PIN

TDA7465

14/20

SRS SPACE CONTROL: ATTENUATION SELECTION

MSB

LSB

SPACE ATTENUATION

1 dB STEPS

-1

-2

-3

-4

-5

-6

-7

8 dB STEPS

-8

-16

-24

MUTE

X = DON'T CARE
SPEAKER/RECORD ATTENUATION = 0dB

-31dB

SRS CENTER CONTROL: ATTENUATION SELECTION

MSB

LSB

CENTER ATTENUATION

1 dB STEPS

-1

-2

-3

-4

-5

-6

-7

8 dB STEPS

-8

-16

-24

MUTE

SRS INPUT

NO SURROUND SIGNAL

SURROUND SIGNAL

SRS SWITCH

SRS ON

SRS OFF

X = DONT' CARE
SPACE ATTENUATION = 0dB

-31dB

RECOMMENDED TO ATTENUATE -3dB IN INPUT ATTENUATION DURING "SRS OFF"
TO FULFILL SRS BYPASS MODE WHEN SRS FUNCTION IS USED

TDA7465

15/20

POWER ON RESET

SURROUND & OUT CONTROL+ EFFECT CONTROL

OFF + FIX + MAX ATTENUATION

SPEAKER/RECORD ATTENUATION L &R MODE

MUTE + ZERO CROSS ATT.OFF

INPUT ATTENUATION + REAR SWITCH

MAX ATTENUATION + ON

VOICE CANCELLER

OFF

INPUT

IN1

MIX SWITCH

NO MIX PIN

SRS SURROUND

OFF + MAX ATTENUATION

BASS & MIDDLE

2dB

TREBLE

0dB

D96AU472

GND

PIN: REAR OUT

100K

REF

D96AU478

PIN: MIX

5.5K

60K

GND

HP1

D94AU199

5.5K

PIN: HP2

10K

60K

GND

LP1

HP2

D94AU198

PIN: HP1

PIN DESCRIPTION

TDA7465

16/20

10K

D95AU233A

GND

PIN: VOUT REF

25K

D95AU309

GND

PINS: TREBLE-L, TREBLE-R

45K

25K

D95AU231A

BASS-RO,MIDDLE-LO,MIDDLE-RO

BASS-LO

GND

: Bass

: MIDDLE

PINS: BASS-LI,BASS-RI,MIDDLE-LI, MIDDLE-RI,

D95AU230

GND

PINS: BASSO-L, BASSO-R

(*)

D95AU232

BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI

GND

(*) 45K : Bass

25K : MIDDLE

PINS: BASS-LO, BASS-RO, MIDDLE-LO, MIDDLE-

50K

GND

REF

D94AU200

PINS: L-IN, R-IN

TDA7465

18/20

Gage Plane

.015

0,38

SDIP42

DIM.

inch

MIN.

TYP.

MAX.

MIN.

TYP.

MAX.

5.08

0.20

0.51

0.020

3.05

3.81

4.57

0.120

0.150

0.180

0.38

0.46

0.56

0.0149

0.0181

0.0220

0.89

1.02

1.14

0.035

0.040

0.045

0.23

0.25

0.38

0.0090

0.0098

0.0150

36.58

36.83

37.08

1.440

1.450

1.460

15.24

16.00

0.60

0.629

12.70

13.72

14.48

0.50

0.540

0.570

1.778

0.070

15.24

0.60

18.54

0.730

1.52

0.060

2.54

3.30

3.56

0.10

0.130

0.140

SDIP42 PACKAGE MECHANICAL DATA

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Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as criticalcomponents in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.

The Sound Retrieval System and

are registered trademarks of SRS Labs, Inc.

SGS-THOMSON Microelectronics GROUP OF COMPANIES

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TDA7465

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