TDA7344P [STMICROELECTRONICS]
DIGITAL CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX; 环绕声矩阵数字控制音频处理器
| 型号： | TDA7344P |
| 厂家： | 
ST |
| 描述： | DIGITAL CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX |
| 文件： | 总20页 (文件大小：202K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TDA7344
DIGITAL CONTROLLED AUDIO PROCESSOR
WITH SURROUND SOUND MATRIX
1 STEREO INPUT
VOLUME CONTROL IN 1.25dB STEP
TREBLE AND BASS CONTROL
THREE SURROUND MODES ARE AVAIL-
ABLE:
– MOVIE, MUSIC AND SIMULATED
FOUR SPEAKER ATTENUATORS:
– 4 INDEPENDENT SPEAKERS CONTROL
IN 1.25dBSTEPS FOR BALANCE FACILITY
– INDEPENDENT MUTE FUNCTION
PQFP44
(10 X 10)
SDIP42
ORDERING NUMBERS: TDA7344P (PQFP44)
TDA7344S (SDIP42)
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL BUS
shifters and a signal matrix. 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 used BIPOLAR/CMOSTechnology,
Low Distortion, Low Noise and DC stepping are
obtained.
DESCRIPTION
The TDA7344 is a volume tone (bass and treble)
balance (Left/Right) processor for quality audio
applications in car radio and Hi-Fi systems.
It reproduces surround sound by using phase
PIN CONNECTIONS
1/20
February 1997
TDA7344
BLOCK DIAGRAM
2/20
TDA7344
TEST CIRCUIT
THERMAL DATA
Symbol
Description
Value
Unit
Rth j-pins
Thermal Resistance Junction-pins
Ma x.
85
°C/W
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VS
Tamb
Tstg
Operating Supply Voltage
11
V
Operating Ambient Temperature
Storage Temperature Range
-10 to 85
C
°
-55 to +150
°C
QUICK REFERENCE DATA
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
VS
VCL
THD
S/N
SC
Supply Voltage
7
2
9
10.5
Max. input signal handling
Vrms
%
Total Harmonic Distortion V = 1Vrms f = 1KHz
Signal to Noise Ratio V out = 1Vrms (made = OFF)
Channel Separation f = 1KHz
Volume Control 1.25dB step
0.02
106
70
0.1
dB
dB
dB
dB
dB
dB
dB
-78.75
-14
0
Treble Control (2db step)
+14
+14
0
Bass Control (2db step)
-14
Balance Control 1.25dB step (LCH, RCH)
Mute Attenuation
-38.75
90
3/20
TDA7344
ELECTRICAL CHARACTERISTICS
Ω
(refer to the test circuit Tamb = 25°C, VS = 9V, RL = 10K ,
RG = 600Ω, all controls flat (G = 0),Effect Ctrl = -6dB, MODE = OFF; f = 1KHz
unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SUPPLY
VS
IS
Supply Voltage
7
9
10.5
35
V
Supply Current
Ripple Rejection
20
60
25
80
mA
dB
SVR
LCH / RCH out, Mode = OFF
INPUT STAGE
RII
Input Resistance
35
2
50
2.5
65
KΩ
Vrms
Vrms
dB
VCL
Clipping Level
THD = 0.3%; Lin or Rin
THD = 0.3%; Rin + Lin (2)
3.0
CRANGE
AVMIN
AVMAX
ASTEP
VDC
Control Range
Min. Attenuation
Max. Attenuation
Step Resolution
DC Steps
19.68
0
-1
18.68
0.11
-3
1
20.68
0.51
3
dB
19.68
0.31
0
dB
dB
adjacent att. step
mV
VOLUME CONTROL
CRANGE
AVMIN
AVMAX
ASTEP
EA
Control Range
70
-1
75
0
dB
dB
dB
dB
Min. Attenuation
Max. Attenuation
Step Resolution
1
70
0.5
75
1.25
0
Av = 0 to -40dB
1.75
Attenuation Set Error
Av = 0 to -20dB
Av = -20 to -60dB
-1.5
-3
1.5
2
dB
dB
ET
Tracking Error
DC Steps
2
dB
VDC
adjacent attenuation steps
From 0dB to Av max
-3
-5
0
0.5
3
5
mV
mV
BASS CONTROL (1)
Gb
BSTEP
RB
Control Range
Max. Boost/cut
+11.5
1
+14
2
+16
3
dB
dB
KΩ
Step Resolution
Internal Feedback Resistance
32
44
56
TREBLE CONTROL (1)
Gt
Control Range
Max. Boost/cut
+13
0.5
+14
2
+15
1.5
dB
dB
TSTEP
Step Resolution
EFFECT CONTROL
CRANGE
SSTEP
Control Range
Step Resolution
- 21
- 6
dB
dB
1
4/20
TDA7344
ELECTRICAL CHARACTERISTICS
(continued)
SURROUND SOUND MATRIX
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
GOFF
In-phase Gain (OFF)
Mode OFF, Input signal of
-1.5
0
1.5
dB
1kHz, 1.4 Vp-p, Rin → Rout
Lin
L
out
→
DGOFF
GMOV1
GMOV2
DGMOV
GMUS1
GMUS2
DGMUS
LMON1
LMON2
LMON3
RMON1
RMON2
RMON3
LR In-phase Gain Difference
(OFF)
Mode OFF, Input signal of
1kHz, 1.4 Vp-p
-1.5
0
7
1.5
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
KΩ
(Rin → Rout), (L → Lout
)
in
In-phase Gain (Movie 1)
In-phase Gain (Movie 2)
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
R
in → Rout, Lin → Lout
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
8
R
in → Rout, Lin → Lout
LR In-phase Gain Diffrence
(Movie)
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
0
(Rin → Rout) – (L → Lout
)
in
In-phase Gain (Music 1)
In-phase Gain (Music 2)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
6
(Rin → Rout) – (L → Lout
)
in
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
7.5
0
Rin
Rout, Lin
L
→
out
→
LR In-phase Gain Difference
(Music)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
(Rin
R
out) – (L
L )
→
out
→
in
Simulated L Output 1
Simulated L Output 2
Simulated L Output 3
Simulated R Output 1
Simulated R Output 2
Simulated R Output 3
Simulated Mode, EffectCtrl= -6dB
Input signal of 250Hz,
4.5
– 4.0
7.0
– 4.5
3.8
– 20
1.4 Vp-p, R and Lin
L
out
→
in
Simulated Mode, EffectCtrl= -6dB
Input signal of 1kHz,
1.4 Vp-p, R and Lin → Lout
in
Simulated Mode, EffectCtrl= -6dB
Input signal of 3.6kHz,
1.4 Vp-p, R and Lin → Lout
in
Simulated Mode, EffectCtrl= -6dB
Input signal of 250Hz,
1.4 Vp-p, R and Lin →Rout
in
Simulated Mode, EffectCtrl= -6dB
Input signal of 1kHz,
1.4 Vp-p, R and Lin →Rout
in
Simulated Mode, EffectCtrl= -6dB
Input signal of 3.6kHz,
1.4 Vp-p, R and Lin → Rout
in
RLP1
RPS1
RPS2
RPS3
RPS4
RHPF
RLPF
Low Pass Filter Resistance
Phase Shifter 1 Resistance
Phase Shifter 2 Resistance
Phase Shifter 3 Resistance
Phase Shifter 4 Resistance
High Pass Filter Resistance
LP Pin Impedance
7.5
13.5
0.3
10
17.95
0.4
12.5
22.5
0.5
k
Ω
KΩ
KΩ
KΩ
13.6
13.6
45
18.08
18.08
60
22.6
22.6
75
K
Ω
7.5
10
12.5
KΩ
5/20
TDA7344
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SPEAKER ATTENUATORS
Crange
SSTEP
EA
Control Range
35
0.5
-1.5
80
37.5
1.25
40
1.75
1.5
dB
dB
dB
dB
Step Resolution
Attenuation set error
Output Mute Attenuation
DC Steps
AMUTE
VDC
90
adjacent att. steps
from 0 to mute
0
1
mV
mV
SPEAKER ATTENUATORS AUX
Crange
SSTEP
EA
Control Range
70
0.5
-1.5
-3
75
1.25
0
dB
dB
dB
dB
mV
dB
Step Resolution
Attenuation set error
Av = 0 to -40dB
Av = 0 to 20dB
1.75
1.5
2
Av = -20 to -60dB
adjacent att. steps
0
VDC
DC Steps
-3
0
3
AMUTE
Output Mute Attenuation
80
90
AUDIO OUTPUTS
VOCL
ROUT
VOUT
Clipping Level
d = 0.3%
2
2.5
200
4.5
Vrms
Ω
Output resistance
DC Voltage Level
100
4.2
300
4.8
V
GENERAL
NO(OFF)
Output Noise (OFF)
BW = 20Hz to 20KHz
Output R and L
8
15
15
30
µVrms
Output AUX R and L
Vrms
µ
NO(MOV)
NO(MUS)
NO(MON)
Output Noise (Movie)
Output Noise (Music)
Output Noise (Simulated)
Mode =Movie ,
BW = 20Hz to 20KHz
30
30
30
Vrms
µ
Rout and Lout measurement
Mode = Music ,
BW = 20Hz to 20KHz,
Vrms
Vrms
µ
µ
Rout and Lout measurement
Mode = Simulated,
BW = 20Hz to 20KHz
Rout and Lout measurement
d
Distorsion
Av = 0 ; Vin = 1Vrms
0.02
70
0.1
1
%
SC
Channel Separation
60
dB
BUS INPUTS
VIL
VIH
IIN
Input Low Voltage
Input High Voltage
Input Current
V
V
3
-5
+5
µA
V
VO
Output Voltage SDA
Acknowledge
IO = 1.6mA
0.4
0.8
Note:
(1) Bass and Treble response: The center frequency and the resonance quality can be choosen by
the external circuitry. A standard first order bass response can be realized by a standard feedback network.
VS
2
(2) The peack voltage of the two input signals must be less then
VS
:
(Lin + Rin) peak • AVin
<
2
6/20
TDA7344
2C BUS INTERFACE
knowledge bit. The MSB is transferredfirst.
Acknowledge
I
Data transmission from microprocessor to the
TDA7344 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).
The master (µP) 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 the acknowledge clock pulse, so that the
SDA line is stable LOW duringthis 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.
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.
Transmission without Acknowledge
Avoiding to detect the acknowledge of the audio-
processor, the µP can use a simpler transmission:
simply it waits one clock without checking the
slave acknowledging, and sends the new data.
Byte Format
Every byte transferred on the SDA line must con-
tain 8 bits. Each byte must be followed by an ac-
This approach of course is less protected from
misworking and decreases the noise immunity.
2
Figure 3:
Data Validity on the I CBUS
2
Figure 4:
Timing Diagram of I CBUS
Figure 5: Acknowledge on the I2CBUS
7/20
TDA7344
of each transmitted byte.
A subaddress(function) bytes (identified by the
MSB = 0)
A sequence of dates and subaddresses (N
bytes + achnowledge. The dates are identified
by MSB = 1, subaddressesby MSB = 0)
A stop condition (P)
SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
A start condition (s)
A chip address byte, containing the TDA7344
address (the 8th bit of the byte must be 0). The
TDA7344 must always acknowledge at the end
ACK = Achnowledge
S = Start
P = Stop
So it can receive in a single transmission how
many subaddress are necessary, and for each
subaddresshow many data are necessary.
INTERFACE FEATURES
- Due to the fact that the MSB is used to select
if the byte transmitted is a subaddress (func-
tion) or a data (value), between a start and
stop condition, is possible to receive, how
many subaddressesand datas as wanted.
- The subaddress (function) is fixed until a new
subaddress is transmitted, so the TDA7344
can receive how many data as wanted for the
selected subaddress (without the need for a
new start condition)
2) INCREMENTAL BUS
TDA7344 receives a start condition, the correct
chip address a subaddress with the LSB = 1 (in-
cremental bus): now it is in a loop condition with
an autoincreaseof the subaddress.
The first data that it receives doesn’t concern the
subaddress sended but the next one, the second
one concerns the subaddress sended plus two in
the loop etc, and at the end it receives the stop
condition.
- If TDA7344 receives a subaddress with the
LSB = 1 the incremental bus is selected, so it
enters in a loop condition that means that
every acknowledge will increase automat-
ically the subaddress (function) and it re-
ceives the data related to the new subad-
dress.
In the pictures there are some examples:
S = start
A
0
1
CHIP ADDRESS
80 (HEX)
EXAMPLES
1) NO INCREMENTAL BUS
82 (HEX)
TDA7344 receives a start condition, the correct
chip address, a subaddress with the LSB = 0 (no
incremental bus), N-datas (all these datas con-
cern the subaddress selected), a new subad-
dress, N-data, a stop condition.
ACK = acknowledge
B = 1 incremental bus, B = 0 no incremental bus
P = stop
1) one subaddress, with n data concerning that subaddress(no incremental bus)
8/20
TDA7344
2) one subaddress, (with incremental bus) , with n data (data1 that concerns subaddress+1, data 2
that concerns subaddress+ 2 etc.)
3) moresubaddress with more data
DATA BYTES
FUNCTION SELECTION
FIRST BYTE (subaddress)
The first byte select the function, it is identified by the MSB = 0
MSB
LSB
SUBADDRESS
A0
A1
A2
A3
B
0
0
0
0
0
X
X
X
X
X
B
VOLUME ATTENUATION &
LOUDNESS
1
0
0
X
B
SURROUND & OUT &
EFFECT CONTROL
0
0
0
0
0
0
0
0
1
0
1
0
1
1
1
1
0
0
1
1
1
0
0
1
1
1
1
1
X
X
X
X
X
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
B
B
B
B
B
B
B
BASS
TREBLE
ATT SPEAKER R
ATT SPEAKER L
ATT. ROUT AUX
ATT. LOUT AUX
INPUT STAGE CONTROL
1
B = 1 yes incremental bus;
B = 0 no incremental bus;
X = indifferent 0,1
9/20
TDA7344
VALUE SELECTION
The second byte select the value, it is identified by the MSB = 1
VOLUME ATTENUATION
MSB
LSB
1.25 dB STEPS
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
-1.25
-2.50
-3.75
-5.00
-6.25
-7.50
-8.75
10 dB STEPS
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
-10
-20
-30
-40
-50
-60
-70
SELECTION
LOUDNESS
ON
1
1
0
1
OFF
ATT AUX OUT1 AND 2
MSB
LSB
1.25 dB STEPS
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
0
1
0
1
0
1
0
-1.25
-2.50
-3.75
-5.00
-6.25
-7.50
-8.75
10 dB STEPS
0
0
1
1
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
-10
-20
-30
-40
-50
-60
-70
MUTE
OFF
ON
1
1
0
1
10/20
TDA7344
ATT SPEAKER R AND L
MSB
LSB
1.25 dB STEPS
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
-1.25
-2.50
-3.75
-5.00
-6.25
-7.50
-8.75
10 dB STEPS
0
1
1
1
1
1
X
X
X
X
X
X
X
X
X
X
0
0
1
1
1
0
1
0
1
1
-10
-20
-30
1
1
1
MUTE
TREBLE/ BASS
MSB
LSB
2 dB STEPS
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
14
12
10
8
6
4
2
0
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
-2
-4
-6
-8
-10
-12
-14
11/20
TDA7344
SURROUND & OUT & EFFECT CONTROL
LSB
MSB
SELECTION
SURROUND
SELECTION
1
1
1
1
0
0
1
1
0
1
0
1
SIMULATED
MUSIC
MOVIE
OFF
SELECTION
SELECTION
OUT
1
1
0
1
OUT VAR
OUT FIX
EFFECT CONTROL
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
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
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
-16
-17
-18
-19
-20
-21
For example to select the music mode, out fix, effect control =-9dB:
1 0 0 1 1 1 0 1
12/20
TDA7344
INPUT CONTROL RANGE (0 TO -19.68dB)
LSB
MSB
0.3125 dB STEPS
1
1
1
1
1
1
1
1
X
Xx
X
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
-0.3125
-0.625
-0.9375
-1.25
X
X
X
-1.5625
-1.875
-2.1875
X
X
2.5 dB STEPS
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
-2.5
-5.0
-7.5
-10
-12.5
-15
-17.5
POWER ON RESET
VOLUME ATTENUATION
MAX ATTENUATION, LOUDNESS OFF
TREBLE
BASS
-14dB
-14dB
SURROUND & OUT CONTROL + EFFECT CONTROL
ATT SPEAKER R
OFF + FIX + MAX ATTENUATION
MUTE
MUTE
MUTE
MUTE
ATT SPEAKER L
ATT AUX OUT 1
ATT AUX OUT 2
13/20
TDA7344
PIN:
PIN:
HP2
HP1
PIN:
PIN:
LOUD -R, LOUB-L
Lin, Rin
PIN: AC - LO, AC - RO,
PIN: AC - LIN, AC - RIN,
14/20
TDA7344
PIN:
PIN:
PIN:
PIN:
PIN:
PIN:
BASS - LA, BASS - RA
BASS - LB, BASS - RB
-
VARO L, VARO -R
TREBLE - L, TREBLE - R
-
,
LOUT ROUT, LOUT AUX, ROUT AUX, REAR
VARi L, VAR -R
i
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TDA7344
PIN:
PIN:
PIN:
PIN:
SCL, SDA
ADDR
PS3, PS2
CREF
PIN:
LP
PIN:
PS3A, PS4A
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TDA7344
PIN:
PIN:
PS2A
PS2
PIN: PS1
PIN: PS1A
PIN:
LP1
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TDA7344
PQFP44 PACKAGE MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
MIN.
MAX.
A
A1
A2
B
2.45
0.096
0.25
1.95
0.30
0.13
12.95
9.90
0.010
0.077
0.012
0.005
0.51
2.00
2.10
0.45
0.079
0.083
0.018
0.009
0.53
c
0.23
D
13.20
10.00
8.00
13.45
10.10
0.52
D1
D3
e
0.390
0.394
0.315
0.031
0.520
0.394
0.315
0.031
0.063
0.398
0.80
E
12.95
9.90
13.20
10.00
8.00
13.45
10.10
0.510
0.390
0.530
0.398
E1
E3
L
0.65
0.80
0.95
0.026
0.037
L1
K
1.60
0°(min.), 7°(max.)
D
D1
D3
A
A2
A1
23
33
22
34
0.10mm
.004
Seating Plane
44
12
11
1
C
e
K
PQFP44
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TDA7344
SDIP42 PACKAGE MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
MIN.
MAX.
A
A1
A2
B
5.08
0.20
0.51
3.05
0.020
0.120
0.0149
0.035
0.0090
1.440
0.60
3.81
0.46
1.02
0.25
36.83
4.57
0.56
0.150
0.0181
0.040
0.180
0.0220
0.045
0.0150
1.460
0.629
0.570
0.38
B1
c
0.89
1.14
0.23
0.38
0.0098
1.450
D
36.58
15.24
12.70
37.08
16.00
14.48
E
E1
e
13.72
1.778
15.24
0.50
0.540
0.070
0.60
e1
e2
e3
L
18.54
1.52
3.56
0.730
0.060
0.140
2.54
3.30
0.10
0.130
E
E1
B
B1
e
e1
e2
D
c
E
42
22
.015
0,38
Gage Plane
e3
e2
1
21
SDIP42
19/20
TDA7344
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 critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
1997 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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