STMICROELECTRONICS TDA7465

TDA7465
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.
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 SERIAL 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 applications 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 matrix. 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
May 1997
SDIP42
ORDERING NUMBER: TDA7465
PIN CONNECTION
VS
PS4
PS3
PS2
PS1
LP
LP1
HP1
HP2
VAR_L
BASSO_L
VAR_R
BASSO_R
BASS_LO
BASS_LI
BASS_RO
BASS_RI
MIDDLE_LO
MIDDLE_LI
MIDDLE_RO
MIDDLE_RI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
CREF
REAR_OUT
REAR_IN
LPVC
R_IN
VREFOUT
L_IN
MIX
NETW2
NETW1
RECOUT_L
RECOUT_R
L_OUT
R_OUT
DIG_GND
SCL
SDA
ADDR
AGND
TREBLE_L
TREBLE_R
D96AU479B
connect microphone for KARAOKE feature.
Control of all the functions is accomplished by serial bus.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are
obtained.
1/20
L-IN
R-IN
0.22µF
0.22µF
38
36
50K
50K
31.5dB
control
100nF
LPVC
39
LPF
-
+
RLP1
1
VS
RHP1
9
8
7
31.5dB control
HP1
24
+
+
VOICE
ON
R6
42
SUPPLY
+
-
R5
HP2
AGND
LP1
22µF
37
VREF
VREFOUT
+
L-R
0.47µF
32.4K
4.42K
1.5K
130K
1K
0.47µF
1.2nF
NETW2
NETW1
LP
CENTER
MIX
STEREO
SRS
EFFECT
CONTROL
34
LPF
9KHz
OFF
MOVIE/
SIM
PS3
400Hz
RPS3
3
33
MOVIE/
MUSIC
MUSIC
PS2
4KHz
RPS2
4
PS3
6
1µF
100K
MIX SW
+
-
SIM
PS1
90Hz
RPS1
5
PS2
22nF
35
+
+
MIX SW
PS1
4.7nF
47.5K
SRS
FIX
SPACE
41
4.7nF
5.6nF
40
FIX
SURR
5.6nF
21
22
18
22nF
2.7K
18nF
22nF
RM
20
MIDDLE
TREBLE
50K
MIDDLE
19
RM
2.7K
18nF
TREBLE
23
TREBLE-L
2.2µF
SURR
MIXING
AMP
MIXING
AMP
2
3.74K
PS4
400Hz
RPS4
PS4
22nF
REAR_IN
100nF
TREBLE-R
SRS
REAR_OUT
MIDDLE-LI
MIDDLE-RI
680nF
5.6K
100nF
MUTE
REC
ATT
79dB CONTROL
3BAND
BASS-RO
FIX
BASSO-R
79dB CONTROL
MUTE
REC
ATT
11
BASSO-L
I2C BUS DECODER + LATCHES
3BAND
FIX
100nF
RB
16
SURR
REAR
REAR
BASS
17
RB
14
SURR
BASS
15
BASS-LO
100nF
BASS-LI
5.6K
100nF
BASS-RI
MIDDLE-LO
MIDDLE-RO
2/20
5.6nF
2.2µF
13
10
2.2µF
30K
VAR-R
12
VAR
FIX
FIX
VAR
30K
VAR-L
-
-
+
+
N.B. SW
MUTE
31
29
25
28
26
27
30
32
2.7K
4.7µF
RECOUT-R
2.7K
4.7µF
R-OUT
ADDR
DIG_GND
SDA
SCL
L-OUT
RECOUT-L
D96AU480C
SPKR
ATT
79dB CONTROL
MUTE
SPKR
ATT
79dB CONTROL
N.B. SW
TDA7465
BLOCK DIAGRAM
CREF
TDA7465
THERMAL DATA
Symbol
R th j-pins
Description
Thermal Resistance Junction-pins
Value
Unit
85
°C/W
Ma x.
ABSOLUTE MAXIMUM RATINGS
Symbol
VS
Parameter
Value
Operating Supply Voltage
T amb
Operating Ambient Temperature
Tstg
Storage Temperature Range
Unit
11
V
-10 to 85
°C
-55 to +150
°C
QUICK REFERENCE DATA
Symbol
Min.
Typ.
Max.
VS
Supply Voltage
Parameter
7
9
10.2
VCL
Max. input signal handling
2
Total Harmonic Distortion V = 1Vrms f = 1KHz
0.01
S/N
Signal to Noise Ratio V out = 1Vrms (mode = OFF)
106
SC
Channel Separation f = 1KHz
Treble Control
0.1
%
dB
90
-31.5
(2db step)
V
Vrms
THD
Input Attenuation Control (0.5dB)
Unit
dB
0
dB
-14
+14
dB
Middle Control (2db step)
-14
+14
dB
Bass Control (2dB step)
-14
+14
dB
Balance Control
1dB step (LCH, RCH)
-79
Mute Attenuation
0
100
dB
dB
ELECTRICAL CHARACTERISTICS (refer to the test circuit Tamb = 25°C, VS = 9V, RL = 10KΩ,
Vin = 1Vrms; RG = 600Ω, all controls flat (G = 0dB), Effect Ctrl = -6dB, MODE = OFF; f = 1KHz
unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
9
10.2
Unit
SUPPLY
VS
Supply Voltage
IS
Supply Current
SVR
Ripple Rejection
7
LCH / RCH out, Mode = OFF
60
V
25
mA
80
dB
INPUT STAGE
R IN
Input Resistance
V CL
Clipping Level
ARANGE
THD = 0.3%
37.5
50
2
2.5
Vrms
31.5
dB
Attenuation Range
62.5
KΩ
AVMIN
Min. Attenuation
-1
0
1
AVMAX
Max. Attenuation
31
31.5
32
dB
dB
ASTEP
Step Resolution
-1
0.5
1
dB
VDC
DC Steps
Adjacent att. step
-3
0
3
mV
AVO1
Voice Canceller Output 1
LIN = RIN, R IN = ON,
Vmix = 0V FIX, 0dB attenuation
5
6
7
dB
AVO2
Voice Canceller Output 2
LIN = RIN = 0V Vmix = 1Vrms FIX,
0dB attenuation
-1
0
1
dB
3/20
TDA7465
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
5
6
7
dB
SUPPLY
AVO3
Voice Canceller Output 3
LIN = -RIN, Vmix = 0V FIX,
0dB attenuation
RLPV
Low Pass Filter Resistance
24
32
40
KΩ
RMIX
Input Impedance
75
100
125
KΩ
dB
BASS CONTROL
Gb
BSTEP
RB
Control Range
+12.0
+14.0
+16.0
Step Resolution
Max. Boost/cut
1
2
3
dB
Internal Feedback Resistance
33
44
55
KΩ
+12.0
+14.0
+16.0
dB
1
2
3
dB
18.75
25
31.25
KΩ
+13.0
+14.0
+15.0
dB
1
2
3
dB
MIDDLE CONTROL
Gm
M STEP
RM
Control Range
Max. Boost/cut
Step Resolution
Internal Feedback Resistance
TREBLE CONTROL
Gt
TSTEP
Control Range
Max. Boost/cut
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
GOFF
In-phase Gain (OFF)
Mode OFF, Input signal of
1kHz, 1.4 Vp-p, Rin → Rout
L in → Lout
-1
0
1
dB
D GOFF
LR In-phase Gain Difference
(OFF)
Mode OFF, Input signal of
1kHz, 1.4 Vp-p
R in → Rout, Lin → Lout
-1
0
1
dB
GMOV
In-phase Gain (Movie)
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
R in → Rout, Lin → Lout
8
dB
DGMOV
LR In-phase Gain Difference
(Movie)
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
(Rin → Rout) – (Lin → Lout)
0
dB
GMUS
In-phase Gain (Music)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
(Rin → Rout), (Lin → Lout)
7
dB
D GMUS
LR In-phase Gain Difference
(Music)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
(Rin → Rout) - (Lin → Lout)
0
dB
L MON1
Simulated L Output 1
Simulated Mode, Effect Ctrl = -6dB
Input signal of 250Hz,
1.4 Vp-p, Rin and Lin → Lout
4.5
dB
LMON2
Simulated L Output 2
Simulated Mode, Effect Ctrl = -6dB
Input signal of 1kHz,
1.4 Vp-p, Rin and Lin → Lout
– 4.0
dB
L MON3
Simulated L Output 3
Simulated Mode, EffectCtrl = 6dB
Input signal of 3.6kHz,
1.4 Vp-p, Rin and Lin → Lout
7.0
dB
4/20
TDA7465
ELECTRICAL CHARACTERISTICS (continued)
Symbol
R MON1
Parameter
Simulated R Output 1
R MON2
Simulated R Output 2
R MON3
Simulated R Output 3
RLP1
R HPI
RLPF
R REARIN
RREAROUT
VOUT
Test Condition
Simulated Mode, Effect Ctrl = -6dB
Input signal of 250Hz,
1.4 Vp-p, Rin and Lin →Rout
Simulated Mode, Effect Ctrl = -6dB
Input signal of 1kHz,
1.4 Vp-p, Rin and Lin →Rout
Simulated Mode, Effect Ctrl = -6dB
Input signal of 3.6kHz,
1.4 Vp-p, Rin and Lin → Rout
Low Pass Filter Resistance
High Pass Filter Resistance
LP Pin Impedance
Rear Input Resistance
Rear Output Resistance
DC Rear Voltage Level
D6 = 0
D6 = 0
D6 = 0
Min.
Typ.
– 4.5
Max.
Unit
dB
3.8
dB
– 20
dB
7.5
45
10
60
12.5
75
KΩ
KΩ
7.5
37.5
10
10
50
30
4.5
12.5
62.5
50
KΩ
KΩ
Ω
V
STANDARD SURROUND SOUND EFFECT CONTROL
C RANGE
SSTEP
Control Range
- 21
Step Resolution
-6
1
dB
dB
SURROUND SOUND MATRIX PHASE
R PS10
R PS11
R PS12
R PS13
R PS20
R PS21
Phase
Phase
Phase
Phase
Phase
Phase
Shifter
Shifter
Shifter
Shifter
Shifter
Shifter
1: D1
1: D1
1: D1
1: D1
2: D3
2: D3
= 0, D0
= 0, D0
= 1, D0
= 1, D0
= 0, D2
= 0, D2
=0
=1
=0
=1
=0
=1
8.8
10.6
13.4
28
4.2
5.1
11.8
14.1
17.9
37.3
5.6
6.8
14.8
17.6
22.4
46.6
7
8.5
KΩ
KΩ
KΩ
KΩ
KΩ
KΩ
R PS22
R PS23
R PS30
R PS31
R PS32
R PS33
R PS40
Phase
Phase
Phase
Phase
Phase
Phase
Phase
Shifter
Shifter
Shifter
Shifter
Shifter
Shifter
Shifter
2: D3
2: D3
3: D5
3: D5
3: D5
3: D5
4: D7
= 1, D2
= 1, D2
= 0, D4
= 0, D4
= 1, D4
= 1, D4
= 0, D6
=0
=1
=0
=1
=0
=1
=0
6.3
13.7
9
10.9
13.6
29.3
9
8.4
18.3
12.1
14.5
18.1
39.1
12.1
10.5
22.9
15.1
18.1
22.6
48.9
15.1
KΩ
KΩ
KΩ
KΩ
KΩ
KΩ
KΩ
SRS SURROUND SOUND MATRIX
CENTER
Step C
SPACE
SRS Control Range
Space Step Resolution
PERSP1
Perspective 1
PERSP2
0
1
SRS Space Control Range
Step S
L+R
-31
Center Step Resolution
-31
dB
dB
0
dB
1
dB
Input Signal of 125Hz
SPACE = 0dB, CENTER = MUTE
Rin = GND; Lin → ROUT
12
dB
Perspective 2
Input Signal of 2.15KHz
SPACE = 0dB, CENTER = MUTE
Rin = GND; Lin → ROUT
0
dB
L+ R SRS Curve
SPACE = MUTE, CENTER =0dB
Rin = GND; Lin → ROUT
-8.5
dB
5/20
TDA7465
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SPEAKER & RECORD ATTENUATORS
Crange
Control Range
SSTEP
Step Resolution
EA
VDC
Attenuation set error
DC Steps
AMUTE
Output Mute Condition
RVAR
Input Impedance
79
0.5
Av = 0 to -20dB
dB
1
1.5
dB
-1.5
0
1.5
dB
Av = -20 to -79dB
-3
0
2
dB
Adjacent att. steps
-3
0
3
mV
70
100
22.5
30
37.5
KΩ
dB
SPEAKER ATTENUATORS
V TH
Zero CrossingThreshold
D7 = 0
VS
+ 20
2
mV
AUDIO OUTPUTS
NO(OFF)
Output Noise (OFF)
Output Mute, Flat
BW = 20Hz to 20KHz
4
5
µVrms
µVrms
NO(MOV)
Output Noise (Movie) Standard
Surround Sound
Mode =Movie ,
BW = 20Hz to 20KHz
30
µVrms
NO(MUS)
Output Noise (Music) Standard
Surround Sound
Mode = Music ,
BW = 20Hz to 20KHz,
30
µVrms
NO(SIM)
Output Noise (Simulated)
Standard Surround Sound
Mode = Simulated,
BW = 20Hz to 20KHz
30
µVrms
NO(SRS)
Output Noise (SRS)
Surround Sound
BW = 20Hz to 20KHz
50
µVrms
d
Distorsion
Av = 0 ; Vin = 1Vrms
0.01
SC
Channel Separation
VOCL
Clipping Level
ROUT
Output Resistance
VOUT
DC Voltage Level
d = 0.3%
0.1
%
70
90
dB
2
2.5
Vrms
10
30
50
3.8
Ω
V
BUS INPUTS
6/20
V IL
Input Low Voltage
VIH
Input High Voltage
IIN
Input Current
VO
Output Voltage SDA
Acknowledge
1
3
-5
IO = 1.6mA
V
V
+5
µA
0.4
V
TDA7465
I2C BUS INTERFACE
Data transmission from microprocessor to the
TDA7465 and viceversa takes place through the
2 wires I2C 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 transition of the SDA line while SCL is HIGH.
Byte Format
Every byte transferred on the SDA line must contain 8 bits. Each byte must be followed by an ac-
knowledge bit. The MSB is transferred first.
Acknowledge
The master (µP) puts a resistive HIGH level on the
SDA line during the acknowledge clock pulse (see
fig. 5). The peripheral (audioprocessor) that acknowledges 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 reception 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 generate the STOP information in order to abort the
transfer.
Transmission without Acknowledge
Avoiding to detect the acknowledge of the audioprocessor, the µP 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.
2
Figure 3: Data Validity on the I CBUS
Figure 4: Timing Diagram of I2CBUS
Figure 5: Acknowledge on the I2CBUS
7/20
TDA7465
address
A subaddress bytes
A sequence of data (N byte + achnowledge)
A stop condition (P)
SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
A start condition (S)
A chip address byte, containing the TDA7465
CHIP ADDRESS
SUBADDRESS
MSB
S
1
LSB
0
0
0
0
0
A
0
MSB
ACK
DATA 1 to DATA n
LSB
B
DATA
MSB
ACK
LSB
DATA
ACK
P
D95AU226A
ACK = Achnowledge
S = Start
P = Stop
A = Address
B = Auto Increment
EXAMPLES
No Incremental Bus
The TDA7465 receives a start condition, the cor-
CHIP ADDRESS
SUBADDRESS
MSB
S
1
LSB
0
0
0
0
0
rect chip address, a subaddress with the MSB = 0
(no incremental bus), N-data (all these data concern the subaddress selected), a stop condition.
A
0
MSB
ACK
0
DATA
LSB
X
X
MSB
X D3 D2 D1 D0 ACK
LSB
DATA
ACK
P
D95AU306
Incremental Bus
The TDA7465 receives a start condition, the correct chip address, a subaddress with the MSB = 1
(incremental bus): now it is in a loop condition
with an autoincrease of the subaddress whereas
CHIP ADDRESS
SUBADDRESS
MSB
S
1
LSB
0
0
0
D95AU307
8/20
0
0
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.
A
0
MSB
ACK
1
DATA 1 to DATA n
LSB
X
X
X D3 D2 D1 D0 ACK
MSB
LSB
DATA
ACK
P
TDA7465
DATA BYTES (Address = 80(HEX) [82(HEX) if ADDRESS pin is connected to VS]
FUNCTION SELECTION:
The first byte (subaddress)
MSB
LSB
SUBADDRESS
D7
D6
D5
D4
D3
D2
D1
D0
B
X
X
X
0
0
0
0
INPUT ATTENUATION
B
X
X
X
0
0
0
1
SURROUND & OUT & EFFECT
CONTROL
B
X
X
X
0
0
1
0
PHASE RESISTOR
B
X
X
X
0
0
1
1
BASS
B
X
X
X
0
1
0
0
MIDDLE & TREBLE
B
X
X
X
0
1
0
1
SPEAKER ATTENUATION ”L”
B
X
X
X
0
1
1
0
SPEAKER ATTENUATION ”R”
B
X
X
X
0
1
1
1
RECORD ATTENUATION ”L”
B
X
X
X
1
0
0
0
RECORD ATTENUATION”R”
B
X
X
X
1
0
0
1
VOICE CANCELLER & REC OUT
B
X
X
X
1
0
1
0
SRS / SPACE ATTENUATION
B
X
X
X
1
0
1
1
SRS / CENTER ATTENUATION
B = 1 INCREMENTAL BUS; ACTIVE
B = 0 NO INCREMENTAL BUS;
X = DONT’ CARE
INPUT ATTENUATION SELECTION
MSB
D7
D6
0
0
0
0
0
0
0
0
D5
D4
D3
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
LSB
INPUT ATTENUATION
D0
0
1
0
1
0
1
0
1
0.5 dB STEPS
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
4 dB STEPS
0
-4
-8
-12
-16
-20
-24
-28
INPUT ATTENUATION = 0 ∼ -31.5dB
9/20
TDA7465
STANDARD SURROUND SELECTION
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
0
0
1
1
D0
0
1
0
1
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
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
D7
LSB
D6
D5
0
0
1
1
0
0
1
1
10/20
0
1
0
1
D4
0
1
0
1
D3
D2
0
0
1
1
0
1
0
1
D1
0
0
1
1
D0
0
1
0
1
SURROUND PHASE
RESISTOR
PHASE SHIFT 1 (KΩ)
12
14
18
37
PHASE SHIFT 2 (KΩ)
6
7
8
18
PHASE SHIFT 3 (KΩ)
12
14
18
39
PHASE SHIFT 4 (KΩ)
12
14
18
39
TDA7465
BASS SELECTION
MSB
D7
D6
D5
D4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D2
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
D1
0
0
1
1
0
0
1
1
1
1
0
0
1
1
0
0
LSB
BASS
D0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
2 dB STEPS
-14
-12
-10
-8
-6
-4
-2
0
0
2
4
6
8
10
12
14
11/20
TDA7465
MIDDLE & TREBLE SELECTION
MSB
D7
D6
D5
D4
LSB
MIDDLE
D3
D2
D1
D0
2 dB STEPS
0
0
0
0
-14
0
0
0
1
-12
0
0
1
0
-10
0
0
1
1
-8
0
1
0
0
-6
0
1
0
1
-4
0
1
1
0
-2
0
1
1
1
0
1
1
1
1
0
1
1
1
0
2
1
1
0
1
4
1
1
0
0
6
1
0
1
1
8
1
0
1
0
10
1
0
0
1
12
1
0
0
0
14
TREBLE
2 dB STEPS
0
0
0
0
-14
0
0
0
1
-12
0
0
1
0
-10
0
0
1
1
-8
0
1
0
0
-6
0
1
0
1
-4
0
1
1
0
-2
0
1
1
1
0
1
1
1
1
0
1
1
1
0
2
1
1
0
1
4
1
1
0
0
6
1
0
1
1
8
1
0
1
0
10
1
0
0
1
12
1
0
0
0
14
12/20
TDA7465
LEFT CHANNEL SPEAKER ATTENUATION SELECTION
MSB
D7
D6
D5
D4
D3
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
X
X
X
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
LSB
SPEAKER/RECORD ATT
D0
0
1
0
1
0
1
0
1
1 dB STEPS
0
-1
-2
-3
-4
-5
-6
-7
8 dB STEPS
0
-8
-16
-24
-32
-40
-48
-56
-64
-72
MUTE
LSB
ZERO CROSS ATT. MODE
D0
1 dB STEPS
ON
OFF
LEFT & RIGHT CHANNELS BOTH
MSB
D7
0
1
D6
D5
D4
D3
D2
D1
X = DON’ TCARE
SPEAKER/RECORD ATTENUATION = 0dB ∼ -79dB
13/20
TDA7465
RECORD AND RIGHT CHANNEL SPEAKER ATTENUATION SELECTION
MSB
D7
D6
D5
D4
D3
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
X
X
X
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
LSB
SPEAKER/RECORD ATT
D0
0
1
0
1
0
1
0
1
1 dB STEPS
0
-1
-2
-3
-4
-5
-6
-7
8 dB STEPS
0
-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
D7
LSB
D6
0
0
1
1
0
1
14/20
D5
0
1
0
1
D4
D3
D2
1
1
D1
1
1
0
0
1
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D0
0
1
VOICE CANCELLER
OFF
ON
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
SRS SPACE CONTROL: ATTENUATION SELECTION
MSB
D7
D6
D5
D4
D3
0
0
0
0
0
0
1
1
0
1
0
1
1
X
X
LSB
SPACE ATTENUATION
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
1 dB STEPS
0
-1
-2
-3
-4
-5
-6
-7
8 dB STEPS
0
-8
-16
-24
MUTE
X
X
X
X = DON’T CARE
SPEAKER/RECORD ATTENUATION = 0dB ∼ -31dB
SRS CENTER CONTROL: ATTENUATION SELECTION
MSB
D7
D6
0
1
0
1
D5
D4
D3
0
0
0
0
0
0
1
1
0
1
0
1
1
X
X
LSB
CENTER ATTENUATION
1 dB STEPS
0
-1
-2
-3
-4
-5
-6
-7
8 dB STEPS
0
-8
-16
-24
MUTE
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
X
X
X
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
15/20
TDA7465
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
PIN DESCRIPTION
PIN: REAR OUT
PIN: HP1
LP1
VS
VS
10K
20µA
10Ω
60K
GND
HP2
D96AU472
PIN: HP2
GND
D94AU198
PIN: MIX
VS
VS
20µA
20µA
5.5K
60K
HP1
GND
5.5K
D94AU199
16/20
100K
VREF
D96AU478
TDA7465
PINS: VAR-L, VAR-R,
PIN: CREF
VS
VS
20µA
20µA
20K
42K
SW
30K
20K
GND Vref
D95AU227
D95AU336
GND
PINS: SCL, SDA
PIN: LP1
VS
20µA
20µA
10K
GND
GND
HP1
D94AU205
D94AU211
PINS: PS1, PS2, PS3, PS4, LP
PINS: L-OUT, R-OUT, RECOUT-L, RECOUT-R
VS
VS
20µA
10Ω
GND
GND
20µA
GND
D95AU308
D96AU477
GND
17/20
TDA7465
PINS: BASSO-L, BASSO-R
PINS: BASS-LI,BASS-RI,MIDDLE-LI, MIDDLE-RI,
VS
VS
20µA
20µA
45K : Bass
or
25K : MIDDLE
GND
BASS-LO
GND
BASS-RO,MIDDLE-LO,MIDDLE-RO
D95AU231A
D95AU230
PINS: BASS-LO, BASS-RO, MIDDLE-LO, MIDDLE-
PINS: TREBLE-L, TREBLE-R
VS
VS
20µA
20µA
(*)
25K
GND
BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI
D95AU232
GND
(*) 45K : Bass
25K : MIDDLE
D95AU309
PINS: L-IN, R-IN
PIN: VOUT REF
VS
VS
20µA
20µA
GND
50K
D95AU233A
10K
GND
18/20
GND
VREF
D94AU200
TDA7465
SDIP42 PACKAGE MECHANICAL DATA
mm
DIM.
MIN.
inch
TYP.
MAX.
A
MIN.
TYP.
MAX.
5.08
0.20
A1
0.51
0.020
A2
3.05
3.81
4.57
0.120
0.150
0.180
B
0.38
0.46
0.56
0.0149
0.0181
0.0220
B1
0.89
1.02
1.14
0.035
0.040
0.045
c
0.23
0.25
0.38
0.0090
0.0098
0.0150
D
36.58
36.83
37.08
1.440
1.450
1.460
E
15.24
16.00
0.60
E1
12.70
14.48
0.50
13.72
0.629
0.540
e
1.778
0.070
e1
15.24
0.60
0.570
e2
18.54
0.730
e3
1.52
0.060
L
2.54
3.30
3.56
0.10
0.130
0.140
E
A2
A
L
A1
E1
B
B1
e
e1
e2
D
c
E
42
22
.015
0,38
Gage Plane
1
e3
21
e2
SDIP42
19/20
TDA7465
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.
 1997 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved
The Sound Retrieval System and
are registered trademarks of SRS Labs, Inc.
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
20/20