TDA7340

AUDIO SIGNAL PROCESSOR

AUDIOPROCESSOR:

MUTE, SOFT MUTE AND ZERO CROSSING

MUTE

ONE DIFFERENTIAL, TWO STEREO AND

TWO MONO INPUTS

DIFFERENTIAL PHONE INPUT
VOLUME, BASS, TREBLE AND LOUDNESS

CONTROL

FOUR SPEAKER ATTENUATORS WITH IN-

DEPENDENT ATTENUATION CONTROL

STEREODECODER:

ADJUSTMENT FREE INTEGRATED 456KHz

VCO

HIGH CUT CONTROL
STEREO BLEND

NOISE BLANKER:

INTEGRATED HIGH-PASS FILTER
NOISE RECTIFIER OUTPUT FOR QUALITY

DETECTION

PROGRAMMABLE TRIGGER THRESHOLD

PAUSE DETECTOR:

PROGRAMMABLE THRESHOLD

ALLFUNCTIONS PROGRAMMABLEVIA I

C BUS

DESCRIPTION
The TDA7340 I

C bus controlled audio signal

processor contains all signal processing blocks of
a high performance car radio, including audio-
processor, stereodecoder, noise blanker, pause

detector and different mute functions.
The use of BICMOS technology allows the imple-
mentation of several filter functions with switched
capacitor techniques like fully integrated, adjust-
ment free PLL Loop filter, pilot detector with inte-
grator and two 19KHz notch filters.
This minimizes the number of external compo-
nents.
Due to a highly linear signal processing, using
CMOS-switching techniques instead of standard
bipolar multipliers, very low distortion and very
low noise are obtained also in the stereodecoder
part. The audioprocessor contains several new
features like softmute, zero-crossing mute and
pause detector.
Very low Dc stepping is obtained by use of a
BICMOS technology.

September 1999

ORDERING NUMBER: TDA7340P

PQFP44

1/16

AUDIO PROCESSOR PART
FEATURES:
Input Multiplexer:

DIFFERENTIAL CD STEREO INPUT
CASSETTE STEREO INPUT
FM STEREO INPUT FROM STEREODE-

CODER

AM INPUT:

MONO OR STEREO MODE (PROGRAMMA-
BLE)

BEEP INPUT (ONLY IN AM MONO MODE)
TELEPHONE DIFFERENTIAL MONO INPUT
GAIN PROGRAMMABLE IN

3 x 3.75dB

STEPS

Loudness:

FULLY PROGRAMMABLE
15 x 1.25dB STEPS

Volume Control:

1.25dB COARSE ATTENUATOR
0.31dB FINE ATTENUATORS
MAX GAIN 20dB
MAX ATTENUATION 59.7dB (PLUS LOUD-

NESS)

Bass Control

7 x 2dB STEPS

2nd ORDER SYMMETRICAL OR NON SYM-

METRICAL FREQUENCY RESPONSE
(PROGRAMMABLE)

Treble Control

7 x 2dB STEPS

Speaker Control

4 INDEPENDENT SPEAKER CONTROL IN

1.25dB STEPS

CONTROL RANGE 37.5dB
INDEPENDENT SPEAKER MUTE

Mute Functions

DIRECT MUTE

ZERO CROSSING MUTE WITH PROGRAM-
MABLE THRESHOLD
SOFT MUTE WITH EXTERNAL DEFINED
SLOPE

Pause Detector

PROGRAMMABLE THRESHOLD
DELAY TIME DEFINED BY AN EXTERNAL
CAPACITOR

STEREO DECODER PART
FEATURES:

INTEGRATED 19KHZ NOTCH FILTER FOR
PILOT CANCELLATION
ON CHIP FILTER FOR PILOT DETECTOR
AND PLL
ADJUSTMENT FREE VOLTAGE CONTROL-
LED OSCILLATOR
AUTOMATIC

PILOT

DEPENDENT

MONO/STEREO SWITCHING
VERY HIGH INTERMODULATION AND IN-
TERFERENCE SUPPRESSION
I

C BUS CONTROLLED (STD OFF, FORCED

MONO, STEREO)
HIGH CUT CONTROL
STEREO BLEND

NOISE BLANKER PART
FEATURES:

INTERNAL 2nd ORDER HIGH-PASS FILTER
NOISE RECTIFIER OUTPUT FOR SIGNAL
QUALITY DETECTION
PROGRAMMABLE TRIGGER THRESHOLD
TRIGGER THRESHOLD DEPENDENT ON
HIGH FREQUENCY NOISE
BLANKING TIME PROGRAMMABLE BY EX-
TERNAL CAPACITOR
VERY LOW OFFSET CURRENT DURING
HOLD TIME DUE TO OPAMPS WITH MOS
INPUTS
LEVEL INPUT FOR ADDITIONAL SPIKE DE-
TECTION ON FIELD STRENGTH

TDA7340

2/16

SUPPLY

VOLUME

LOUDNESS

DEMODULATOR

CREF

PAUSE

OUT

D93AU046B

BUS

PLL

456KHz

VDD

1nF

C13

47nF

C15

TDA7340

(AM

MONO)

AM_L

CASS

MUX

PHONE

GND

4.7

PAUSE

47nF

MPX

MUTE

SOFT

MUTE

47nF

BASS

6.2K

100nF

TREBLE

C11

2.7nF

C12

OUT

SCL

SDA

DIGGND

80KHz

25KHz

19KHz

NOTCH

NOISE

BLANKER

HIGH

CUT

CONTROL

PEAK

DETECTOR

PULSE

FORMER

LEVEL

CONTROL

LEVEL

PEAK

TBLANK

47nF

C16

470pF

C17

100K

47K

68K

47K

VSB

VHCC

reflevel

level

1nF

C14

field

strength

L+

R+

OUTR

OUTL

INR

INL

AM_R

(BEEP)

CASS

PHONE

VCO

GND

LOUD

CSM

BINL

BOUTL

BINR

BOUT

C10

(*)

(**)

NETWORK

ADAPTED

THE

SPECIFIC

REQUESTS

FOR

STEREO

BLEND

AND

HIGH

CUT

CONTROL

BLOCK DIAGRAM

TDA7340

3/16

ELECTRICAL CHARACTERISTICS (V

= 9V; T

amb

= 25

C; R

= 10K

; all gains = 0dB; f = 1KHz;

unless otherwise specified, refer to the Test Circuit.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

SUPPLY

Supply Voltage

Supply Current

Stereo Decoder = ON

Stereo Decoder = OFF

12.5

SVR

Ripple Rejection

Audioprocessor

Stereo Decoder + Audioprocessor

INPUT SECTION

Input Resistance

100

130

Clipping Level

0.3%

2.1

2.6

Vrms

Input Separation

100

Output Load Resistance

I MIN

Minimum Input Gain

-0.75

0.75

I MAX

Max Input Gain

10.25

11.25

12.25

STEP

Step Resolution

2.75

3.75

4.75

Input Noise

Single Ended Input

2.3

Dc Steps

Adjacent Gain Step

MIN

to G

MAX

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

Operating Supply Voltage

10.5

amb

Operating Temperature Range

-40 to 85

stg

Storage Temperature Range

-55 to 150

THERMAL DATA

Symbol

Parameter

Value

Unit

th j-pins

Thermal Resistance Junction-pins

max 85

C/W

PIN CONNECTION

18 19 20 21 22

44 43 42 41

38 37 36 35 34

GND

LOUD R

LOUD L

IN L

OUT L

CREF

SDA

SCL

CSM

DIGGND

VDD

PAUSE

VCO

PEAK

TBLANK

HCR

LEVEL

HCL

VSB

VHCC

MPX

OUT

BIN

BOUT

BIN

AM_L

(BEEP)

AM_R

(AM

MONO)

CASS

PHON IN

PHON GND

OUT LF

OUT LR

OUT RR

OUT RF

TR L

CD L+

CD L-

CD R+

CD R-

D94AU055A

12 13 14 15 16

TDA7340P

(PQFP44)

TDA7340

4/16

ELECTRICAL CHARACTERISTICS (continued.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

DIFFERENTIAL CD STEREO INPUT

Input Resistance

Input selector BIT D6 = 0 (0dB)

Input selector BIT D6 = 1(-6dB)

CMRR

Common Mode Rejection Ratio

= 1V

RMS

;

f = 1KHz

f = 10KHz

Distortion

= 1V

RMS

0.01

0.08

Input Noise

20Hz to 20KHz; Flat; D6 = 0

DIFF

Differential Gain

D6 = 0

-1

D6 = 1

-7

-6

-5

DIFFERENTIAL TELEPHONE MONO INPUT

Input Resistance

CMRR

Common Mode Rejection Ratio

= 1V

RMS

; f = 1KHz

Distortion

= 1V

RMS

0.15

0.5

Input Noise

20Hz to 3 KHz; Flat

DIFF

Differential Gain

-4.75

-3.75

-2.75

VOLUME CONTROL

Input Resistance (INR, INL)

MAX

Max Gain

18.75

21.25

MAX

Max Attenuation

57.7

59.7

62.7

STEPC

Step Resolution Coarse
Attenuation

0.50

1.25

2.00

STEPF

Step Resolution Fine
Attenuation

0.11

0.31

0.51

Attenuation Set Error

G = -20 to 20dB

-1.25

1.25

G = -20 to -59.7dB

Tracking Error

DC Steps

Adjacent Attenuation Steps

-3

0.1

from 0dB to A

MAX

0.5

LOUDNESS CONTROL (LOUDL, LOUDR)

Internal Resistance

STEP

Step Resolution

0.5

1.25

2.0

MAX

Max Attenuation

17.5

18.75

20.0

ZERO CROSSING MUTE

Zero Crossing Threshold (1)

WIN = 11

WIN = 10

WIN = 01

WIN = 00

160

MUTE

Mute Attenuation

100

DC Step

0dB to Mute

0.3

SOFT MUTE

MUTE

Mute Attenuation

Delay Time

EXT

= 22nF;

I = I

MAX

0 to -20dB;

I = I

MIN

0.8

1.5

2.0

(1) WIN represents the MUTE programming bit pair D6,D5 for the zero crossing window threshold

TDA7340

5/16

ELECTRICAL CHARACTERISTICS (continued.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

BASS CONTROL

RANGE

Control Range

11.5

STEP

Step Resolution

Internal Feedback Resistance

TREBLE CONTROL

RANGE

Control Range

STEP

Step Resolution

SPEAKER ATTENUATORS

RANGE

Control Range

35.0

37.5

40.0

STEP

Step Resolution

0.5

1.25

2.0

MUTE

Output Mute Attenuation

Data Word = 38.75dB

100

Attenuation Set Error

1.50

DC Step

Adjacent Attenuation Steps

0.1

AUDIO OUTPUTS

CLIP

Clipping Level

d = 0.3%

2.1

2.6

RMS

Output Load Resistance

OUT

Output Impedance

100

DC Voltage Level

3.5

3.8

4.1

PAUSE DETECTOR

Zero Crossing Threshold (1)

WIN = 11

WIN = 10

WIN = 01

WIN = 00

160

DELAY

Pull-up Current

THP

Pause Threshold

3.0

GENERAL

Output Noise

BW = 20Hz to 20KHz, flat
Output Muted
All gains = 0dB

2.5

S/N

Signal to Noise Ratio

All gains 0dB; V

= 1V

RMS

;

106

Distortion

= 1V

RMS

;

0.01

0.08

Channel Separation Left/Right

100

Total Tracking Error

= 0 to -20dB;

= -20 to -60dB;

BUS INPUT

Input Low Voltage

Input High Voltage

Input Current

= 0.4V

-5

Output Voltage SDA
Acknowledge

= 1.6mA

0.4

0.8

(1) WIN represent the MUTE programming bit paIr D6,D5 for the zero crossing window threshold

TDA7340

6/16

STEREO DECODER PART
ELECTRICAL CHARACTERISTICS (V

= 9V; modulation frequency: 1KHz; de-emphasis time:

T = 50

s; nominal MPX input voltage: V

MPX

= 0.5V

RMS

(75KHz deviation); G

= 3.5dB; T

amb

= 27

C; un-

less otherwise specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

MPX Input Level

0.5

1.25

RMS

Input Resistance

MIN

Minimum Input Gain

2.5

3.5

4.5

MAX

Maximum Input Gain

9.5

12.5

STEP

Step Resolution

1.75

2.5

3.25

SVRR

Supply Voltage Ripple Rejection

RIPPLE

= 100mV; f = 1KHz

DC Output Voltage (HCL, HCR)

4.2

4.5

4.8

Channel Separation

- V

= 100m

VDC

THD

Total Harmonic distortion

0.02

0.2

Signal plus noise to noise ratio

f = 200Hz to 16KHz; S = 2V

RMS

CARRIER AND HARMONIC SUPPRESSION AT THE OUTPUT

Pilot Signal f = 19KHz

Subcarrier f = 38KHz

Subcarrier f = 57KHz

Subcarrier f = 76KHz

INTERMODULATION (note 1)

mod

= 10KHz; f

spur

= 1KHz

mod

= 13KHz; f

spur

= 1KHz

TRAFFIC RADIO (note 2)

Signal f = 57KHz

SCA - SUBSIDIARY COMMUNICATIONS AUTHORIZATION (note 3)

Signal f = 67KHz

ACI - ADJACENT CHANNEL INTERFERENCE (note4)

114

Signal f = 114KHz

190

Signal f = 190KHz

MONO/ STEREO SWITCH

INTH

Pilot Threshold Voltage

for stereo "ON" P

= 1

= 0

11
18

15
25

22
34

RMS

INTH

Pilot Threshold Voltage

for stereo "OFF" P

= 1

= 0

12
19

18
25

RMS

STEREO BLEND

SB-VR

Control Voltage for Channel
Separation

= 6dB; V

= 3.6V (note 5)

-0.31

-0.26

-0.23

SB-VR

Control Voltage for Channel
Separation

= 26dB;

-50

HIGH CUT CONTROL

deemp

De-Emphasis Time Constant

, C

= 1nF; V

HCC-VR

= 100mV

HCC

High Cut Control Resistance

HCC-VR

= 100mV

HCC

High Cut Control Resistance

HCC-VR

= -1.3V (note 6)

115

150

185

VCO

OSC

Oscillator Frequency

456

f/f

Capture and Holding Range

TDA7340

7/16

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

NOISE INTERFERENCE DETECTOR

Trigger Threshold (1)
(see pulse slope fig 3)

meas. with
V

RECT

= 1.2V

NTB = 00

100

NTB = 10

130

NTB = 11

170

meas. with
V

RECT

= 1.4V

NTB = 00

150

NTB = 10

200

NTB = 11

250

RECT

Rectifier Voltage

MPXIN

= 0mV

0.5

0.9

1.3

MPXIN

= 50mV;f = 150KHz

1.5

MPXIN

= 100mV; f = 150KHz

2.0

2.5

3.0

Suppression Pulse Duration

BLANK

= 470pF

Input Offset Current During
Suppression Time

(1) NTB represent the STDEC programming bit pair D

, D

for the noise blanker trigger threshold

NOTES TO THE CHARACTERISTICS
1 INTERMODULATION SUPPRESSION

(

signal

) (

at1KHz

)

(

spurious

) (

at1KHZ

)

; f

= (2 x 10KHz) - 19KHz

(

signal

) (

at1KHz

)

(

spurious

) (

at1KHZ

)

; f

= (3 x 13KHz) - 38KHz

measured with : 91% mono signal; 9% pilot signal; fm=10KHz or 13KHz

2. TRAFFIC RADIO (V.F.) suppression

(

V.W.F.

)

(

signal

)

(

at1KHz

)

(

spurious

)

(

KHZ

23Hz

)

measured with : 91% stereo signal; 9% pilot signal; fm=1KHz; 5% subcarrier

(f=57KHz, fm = 23Hz AM, m = 60%)

3. SCA (SUBSIDIARY COMMUNICATIONS AUTHORIZATION)

(

signal

)

(

1KHz

)

(

spurious

) (

at9KHZ

)

; f

= (2 x 38KHz) - 67KHz

measured with : 81% mono signal; 9% pilot signal; fm=1KHz;

10% SCA - subcarrier (f

= 67KHz, unmodulated)

4. ACI (ADJACENT CHANNEL INTERFERENCE)

114

(

signal

)

(

KHz

)

(

spurious

) (

KHZ

)

; f

= 110KHz - (3 x 38KHz)

190

(

signal

)

(

KHz

)

(

spurious

) (

KHZ

)

; f

= 186KHz - (5 x 38KHz)

measured with : 90% mono signal; 9% pilot signal; fm=1KHz; 1% spurious signal

= 110KHz or 186KHz, unmodulated)

TDA7340

8/16

NOTES TO THE CHARACTERISTICS (continued)
5. Control range typ 11% of V

(see figure 2)

6. Control range typ 30% of V

(see figure 1)

Figure 1: High Cut Control

-0.4

-0.3

-0.2

-0.1

VSB-VR(V)

D94AU056

SEP

(dB)

VR=3.6V

Figure 2: Stereo Blend

C BUS INTERFACE

Interface Protocol

The interface protocol comprises:

A start condition (s)
A chip address byte, (the LSB bit determines

read/write transmission).

A subaddress byte
A sequence of data (N-bytes + acknowledge)
A stop condition (P)

ACK = Acknowledge
S = Start
P = Stop

I = Autoincrement
MAX CLOCK SPEED 500kbits/s
Autoincrement
If bit I in the subaddress byte is set to "1", the autoincrement of subaddress is enabled.

VTH

VMPX

DC-LEVEL

THIGH

Time

D94AU185

Figure 3

(*) All thresholds are measured by using a pulse with T

= 2

HIGH

= 2

s and T

= 10

The repetition rate must not increase the PEAK voltage.

R/W

ACK

DATA

ACK

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D95AU216

SUBADDRESS

DATA 1 ... DATA n

TDA7340

9/16

MSB

LSB

FUNCTION

Input Selector

Loudness

Volume

Bass, Treble

Speaker Attenuator LF

Speaker Attenuator LR

Speaker Attenuator RF

Speaker Attenuator RR

Mute

Stereodecoder

T = Testmode

I = Autoincrement

X = Not Used

SUBADDRESS (RECEIVE MODE)

TRANSMITTED DATA (SEND MODE)

MSB

LSB

P = Pause (low active)
ZM =Zero Crossing Muted (HIGH = active)
SM = Soft mute activated (HIGH = active)

ST = Stereo (HIGH = active)
X = Not used
The transmitted data is automatically updated af-
ter each 9th clock pulse.
Transmission can be repeated without new chi-
paddress.

MSB

LSB

FUNCTION

Quasi Diff CD

Full Diff CD

Stereo Decoder

Cassette Stereo

AM Mono

Telephone Mono

Beep Mono

AM Stereo

Not allowed

11.25dB gain

7.5dB Gain

3.75dB Gain

0 dB Gain

0dB Differential input Gain (CD Input)

-6dB Differential input Gain (CD Input)

DATA BYTE SPECIFICATION
X = not relevant; set to "1"during testing
INPUT SELECTOR

For example to select quasi diff CD input with 0dB diff gain and 7.5dB input gain the Data Byte is:
00001000

TDA7340

10/16

MUTE

MSB

LSB

FUNCTION

Soft Mute On

Soft Mute with fast slope (I = I

MAX

)

Soft Mute with slow slope (I = I

MIN

)

Direct Mute

Zero Crossing Mute ON

ZC Mute OFF (delayed until next zero crossing)

Zero Crossing Mute and Pause Detector Reset

160mV ZC Window Threshold (WIN = 00)

80mV ZC Window Threshold (WIN = 01)

40mV ZC Window Threshold (WIN = 10)

20mV ZC Window Threshold (WIN = 11)

Nonsymmetrical Bass Cut

Symmetrical Bass Cut

LOUDNESS

MSB

LSB

LOUDNESS

0dB

-1.25dB

-2.5dB

-3.75dB

-5dB

-6.25dB

-7.5dB

-8.75dB

-10dB

-11.25dB

-12.5dB

-13.75dB

-15dB

-16.25dB

-17.5dB

-18.75dB

loudness OFF (1)

For example to select -17.5dB loudness the Data Byte is: XXX01110

Note (1):
If the loudness is switched OFF, the loudness stage is acting like a volume attenuator with flat fre quency response. D0 to D3 determine the
attenuation level.

An additional direct mute function is included in the Speaker Attenuators

TDA7340

11/16

SPEAKER ATTENUATORS

MSB

LSB

SPEAKER ATTENUATORS LF, LR, RF, RR

-1.25dB STEPS

0dB

-1.25dB

-2.5dB

-3.75dB

-5dB

-6.25dB

-7.5dB

-8.75dB

10dB STEPS

0dB

-10dB

-20dB

-30dB

Speaker Mute

For example an attenuationof 25dB on a selected output is given by: 11110100

STEREO DECODER

MSB

LSB

FUNCTION

11dB Input Gain

8.5dB Input Gain

6dB Input Gain

3.5dB Input Gain

Stereo Decoder Muted

Stereo Decoder Off

Forced Mono

Noise Blanker Threshold 1 (NTB = 00)

Noise Blanker Threshold 2 (NTB = 10)

Noise Blanker Threshold 3 (NTB = 11)

Pilot Threshold High (P

= 0)

Pilot Threshold Low (P

= 1)

For example pilot threshold low, noise blanker threshold 2 (NTB = 10), Stereo decoder ON, 6dB input
gain is given by: 11000010.

TDA7340

12/16

BASS/TREBLE

MSB

LSB

FUNCTION

TREBLE STEPS

-14dB

-12dB

-10dB

-8dB

-6dB

-4dB

-2dB

0dB

2dB

4dB

6dB

8dB

10dB

12dB

14dB

BASS STEPS

-14dB

-12dB

-10dB

-8dB

-6dB

-4dB

-2dB

0dB

2dB

4dB

6dB

8dB

10dB

12dB

14dB

For example12dB TREBLE and -8dB BASS give the following Data Byte : 00111001

TDA7340

13/16

VOLUME

MSB

LSB

FUNCTION

0.31dB FINE ATTENUATION STEPS

-0.31dB

-0.62dB

-0.94dB

1.25dB COARSE ATTENUATION STEPS

0dB

-1.25dB

-2.5dB

-3.75dB

-5dB

-6.25dB

-7.5dB

-8.75dB

10dB GAIN ATTENUATION STEPS

20dB

10dB

0dB

-10dB

-20dB

-30dB

-40dB

-50dB

For example to select -47.81dB Volume the Data Byte is: 11011001

STATUS AFTER POWER ON RESET

VOLUME

-59.69dB

BASS, TREBLE

Treble = +2dB, Bass = 0dB, symmetrical

SPKRS LF, RF, LR, RR

-37.5dB

LOUDNESS

OFF , -17.5dB

INPUT

No input selected, GAIN = 0dB, DIFF CD GAIN = -06dB, FULLY DIFF MODE

STEREODEC

OFF , FORCED MONO, 6dB GAIN, PILOT THRESHOLD LOW, NOISE BLANKER =11

MUTE

DIRECTLY MUTED, SOFT OFF, ZEROCROSS RESET, WINDOW THRESHOLD =11

TDA7340

14/16

PQFP44 (10 x 10)

Seating Plane

PQFP44

0.10mm

.004

DIM.

inch

MIN.

TYP.

MAX.

MIN.

TYP.

MAX.

2.45

0.096

0.25

0.010

1.95

2.00

2.10

0.077

0.079

0.083

0.30

0.45

0.012

0.018

0.13

0.23

0.005

0.009

12.95

13.20

13.45

0.51

0.52

0.53

9.90

10.00

10.10

0.390

0.394

0.398

8.00

0.315

0.80

0.031

12.95

13.20

13.45

0.510

0.520

0.530

9.90

10.00

10.10

0.390

0.394

0.398

8.00

0.315

0.65

0.80

0.95

0.026

0.031

0.037

1.60

0.063

(min.), 7

(max.)

OUTLINE AND

MECHANICAL DATA

TDA7340

15/16

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

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