Datasheet STV2112B Datasheet (SGS Thomson Microelectronics)

BUS-CONTROLLED PAL/SECAM TV PROCESSOR

.

I2C BUSCONTROL OF ALLFUNCTIONS

.

INTEGRATEDFILTERS
(TRAP, BANDPASS, CLOCHE)

.

INTEGRATEDLUMINANCE DELAYLINE

.

PAL/SECAMCHROMADEMODULATORS

.

AUTOMATIC CUT-OFF CURRENTLOOP

.

TWORGB INPUTS

.

SVHSSWITCH

.

TWOPLLs HORIZONTAL DEFLECTION

.

VERTICALCOUNT DOWN

.

VERYFEW EXTERNALCOMPONENTS

DESCRIPTION

The STV2112Bis a fully bus controlledIC for TV
luma, chroma and deflectionprocessing.

Used with STV8224(PIF/SIF/switches),TDA1771
orTDA8174(framebooster),STV2180(delayline),
itallowsto designa PAL/SECAM(BGDKIL)setwith
very few externalcomponentsand no adjustment.

SHRINK42

(PlasticPackage)

ORDER CODE :

STV2112B

STV2112B

PIN CONNECTIONS

CHROMA/SCANNING GROUND

CHROMA LOOP FILTER

ACC CONTROL CAP ACITOR

CLOCHE FILTER TUNING

VOLUME AND MUTE CONTROL VOLTAGE

IF STANDARD AND SWITCH S ELECTION

EXTERNAL BLUE INPUT

EXTERNAL GREEN INPUT

EXTERNAL RGB INSERTION

CVBS OR LUMINANCE INPUT

XTAL2 SELECTION

4.43MHz XTAL

DATAWIRE I

CLOCK WIRE I

OSD GREEN INPUT

OS D RGB INSERTION

EXTERNAL RED INPUT

2

C BUS

2

C BUS

FILTER TUNING

OS D BLUE INPUT

OS D RED INPUT

ACC
SDA
SCL

VOL

SWI

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 22

GND2 V

SELECT

CXTL1

CLPF

FTUN1
FTUN2

BOSD
GOSD

ROSD

FBOSD

BEXT

GEXT

REXT

FBEXT

Y/CVBS

GND1

42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23

CC2

BYO
RYO
RYI
BYI
LFB/SC
HOUT
VOUT
VAMP
SLPF
SXTL
BCL
ICAT
RO
GO
BO
CR
CB
CG
CHR/SVHS
V

CC1

CHROMA/SCANNING/BUS SUPP LY
B-Y OUTPUT
R-Y OUTPUT
R-Y INPUT
B-Y INPUT
LINE FLYBACK INPUT/SANDCASTLE OUTP UT
HORIZONTAL OUTP UT
VERTICAL OUTPUT
AMPLITUDE CONTROL VOLTAGE
SCANNING LOOP FILTER
503kHz CERAMIC
BEAM CURRENT LIMITER
CATHODE CURRENT MEASUREMENT
RED OUTPUT
GREEN OUTPUT
BLUE OUTPUT
RED CUT-OFF CAPACITOR
BLUE CUT-OFF CAPACITOR
GREEN CUT-OFF CAPACITOR
CHROMINANCE INPUT/SVHS S ELECTION
VIDEO SUP PLYBUS/VIDEO GROUND

2112B-01.EPS

August 1998

1/24

STV2112B

BLOCKDIAGRAM

CB

25

CG

24

CR

26

ICAT

30

R

G

292827

B

BCL

VOUT

VAMP34

31

35

HOUT

36

EXTERNAL OSD

15 14 13 12

FB RG BFBRGB

R-Y B-Y

STV2112B

BLANKING

AUTO CUT-OFF

BLACK&WHITE

RGB SWITCHES

Contrast

MATRIX

SATURATION

BRIGHTNESS

CONTROL

CONTRAST

FRAME

SCANNING

VIDEO

IDENTIFICATION

SYNC

SEPARATOR

LINE

CUT-OFF
DRIVE
STD

CONT
SAT
BRIG

BUS

SHARP

PAL

DEMODULATORS

SCANNING

DECODER

6 7 11 10

LFB/SC

SXTAL SLPF

SDA SCL

GND2 SWI VOLCLPF R-Y B-Y

2/24

CC2

V

CC1

22 42 19 18 17 1639 38

V

TUNING

CLOCHE

89

FILTER

TUNING

LINE

DELAY

SHARPNESS

Y

CLOCHE

FILTER TUNING

TRAP BANDPASS

20

Y/CVBS

SVHS SWITCH

23

CHR

STANDARD

IDENTIFICATION

ACC5

CHR

ACC

PAL

KILLER

KILLER

SECAM

DELAYLINE INTERFACE

SECAM

DEMODULATORS

PLL

2

3

CXTAL1

SELECT

21 1 373332

GND1

44041

2112B-02.EPS

FUNCTIONAL DESCRIPTION
1 - DEFLECTIONCIRCUIT

Note :

[X,Y] : line number referred to the internal
line counternumbering

- Fully integratedsynch. separator , with a low pass
filter,a blacklevelalignm entof theY/CVBSinput,a
slicinglevelat2/3,1/3ofthesync.pulseamplitude.

- Frame sync. pulse locked on 2 f

frequency to

H

perfect interlace.

- 500kHzVCOwith an externalceramicresonator.

- Two phase locked loops

•

the first PLL locks theVCO on the video signal
frequency,

•

the secondPLLcompensatestheline transistor
storage time.

- Three time constantsfor the first PLL.

• thelongtimeconstantisusedfornormaloperation

• the short time constant is automatically used

duringthe frameretrace andin searchmodeof
VCRwhen the frame pulseis outside[258,264]
and [309,314].

• verylongtimeconstantwhennovideorecognition
Timeconstantsin normaloperation
(automaticselectionof timeconstants):

50Hz input signal:

- short time constant : [306,21]

- long timeconstant : the restof thefield

• inhibition of the firstPLL:

the first locked loop is openedfrom line 309 to
line 4.5 (or 314)in 50Hzmode.

• thetimeconstantsvaluesarechosenby means

of externalcomponents.

• possibility to force the short time constant

throughthe bus.

• possibility to force the very long time constant

throughthe bus.

- Video identification : coincidence detector be­tween the line synchro top and a line frequency
windowfromthefirstPLL.The videoidentification
status isavailablein the output registerof theI

2

C

bus decoder.

- Generation of burst gate pulses and line fre­quency signals from the first PLL to drive the
chroma and video circuits. The burst gate pulse
is also sent to thesandcastlegenerator.

- Frame synchrowindow :
[248,352] catching

- Field frequencyselection windows:
[288,352] 50Hzmode selection window

- frame blankingpulse:
from line 0 to 21 in 50Hzmode

- Verticaloutputpulse is 10.5 lines long.

- Horizontal output pulse : 28µs line pulse on an
open collectoroutput;

- Start up circuit : the horizontaloutput is at a high

STV2112B

level when V
shutting down, horizontal pulses are disabled
when V

CC

- Soft-start circuit : the duty cycleof the horizontal
outputis78%(Thigh/(Thigh+TLow))whenV
is lower than(0.75x V
During the falling time, a 78% duty cycle HOUT
pulse is provided when V
(0.60 x V

CC2

- Possibility to disable the horizontal output pulse
through the bus (forcea high levelon HOUT).

- Horizontal position adjustmentcontrolledby bus.

- Bus controlledoutputvoltageto adjustthevertical
amplitude;thisvoltagepermitsto adjusttheslope
of the verticalsawtoothgeneratedbytheexternal
framebooster.

- Bus controlled vertical position ; the high level of
the vertical pulse permits to adjust the vertical
position.

- Bus controlled 4/3-16/9 selection : the low level
of theverticalpulseis 0.1Vwhen16/9 isselected,
2V when4/3 isselected.

- Combined flyback input and sandcastle output
(Pin 37). Two thresholdson LFB/SCOPin : The
lowestthreshold(0.7V) permitsto extractthe line
blanking pulse ; the highest threshold (2V) per­mits to extractthe line pulsefor PLL2. Thesand­castle signal at Pin 37 is used to control the
externalbasebandchroma delayline.

2 - FILTERS

- Integratedtrap filter:

f

−3dB

1

f

o

−

Q =

Center frequency :

- 4.43MHzfor PAL

- 4.25MHz,for SECAM (f

rejectionbetween 4.1MHzand 4.4MHz)

- Integratedchroma bandpass:
Q = 3.5, Centerfrequency=4.43MHz

- Integratedcloche filterfor SECAM:
Q = 16, Centerfrequency = 4.286MHz

- Integrateddelay line : Bandwidth= 8MHz

- Integratedlow pass filter for deflectionpart.

- Allfil t ersaretunedwitharefer e ncephaselockedloop.
ThePLLconsistsofa lowpassfilter,aphasecompa­rator,a loopfilter(withanexternalcapacito r) .Theref­erencesign alisthecont i nuouscarr i erwavefromthe
VCO (4.43MHz). The PLL adjusts the center fre­quency of the lowpass so that it is equal to the
referencesignal.ThetuningvoltageofthePLLisused
toadjustallotherfilters.Theclochefilterisfinetuned
withasecondPLLoperatingduringframeretrace.

increases from 0 to 6.8V. On

CC

isbelow 6.2V.

),duringtherisingtime.

CC2

CC1

).

Q = 1.7 at sharp.min

f

−

3dB

f

o

Q =3.0 atsharp. max

= 3MHz; -20dB

-3dB

CC1

is lower than

3/24

STV2112B

FUNCTIONAL DESCRIPTION(continued)
3 - VIDEO CIRCUIT

- 2 RGB inputs : RGB (OSD) input has priority
against the RGBext. Maximum contraston RGB
(OSD).-12dB range contrast controlonRGBext.
Possibility to disable the RGBext insertion
throughthe bus.

- Oversizeblanking capabilityon FB(OSD)(Pin15)
input. TheRGB ouputswill be blankedwhenthe
voltage on Pin 15 willexceed the secondthresh­old at1.9V (blanking threshold) : the wholefield
is blankedbutnottheinsertedcut-offpulses.The
OSD insertionthresholdis0.7V.

- Automaticcut-off current loop : 2V cut-off range.
Sequential cut-off current measurement during
the three lines after the frame blanking signal.
Leakage currentmeasurement during the frame
blanking,memorizationon an internalcapacitor.

- Warm up detector.

- Beam current limiterDC voltageinput.
The beam current limiter control voltage will act
on contrast first, then the brightness will be de­creasedwhencontrastattenuationreaches-5dB.

- Bus control of the red, green and blue channel
gain (Whitepoint adjustment)

- Bus controlof the red andgreenDC levels(black
point adjustment)

- PALand SECAM matrix).

- Switch-off of the trapfilterin SVHS mode.

- Buscontrolledcontrastonluminance(20dBrange)

- Bus controlledsaturation (50dBrange)

- Bus controlled brightness : 40% range at maxi­mum contrast.

- Bus controlled sharpness (peaking) ; sharpness
active in PALstandardonly.

- Noise coring function on sharpness.

4 - CHROMA CIRCUIT

4.1 - PAL/SECAMDecoders

- SVHSinputs ; bus controlledSVHS mode.

- 30dB range ACC

- Use of an external ba se b and de lay line
(STV2180 recommended)

- Automaticstandard identification,with possibility
to forcethe standardthroughthe bus.

4.2 - PALDecoder

- ACC done by peak detector on synchronousde­modulationof the burst

- Fully integratedkillerfunctions.

- VCO using crystal4.43MHz
XTALSPECIFICATION:
Frequency:

4.433619MHz(PAL/SECAM)

Vibrationmode :Fondamental,seriesresonance
(no serial capacitor)
Motional capacity : 13fF ±3fF
Resonance resistance: < 70Ω
Shunt capacitance: < 7pF
Spuriousresponse: Noresonance at 3*f

o

and±90odemodulationangles forPAL

-0

±3kHz

o

4.3 - SECAMDecoder

- ACC

- Fully integratedkiller

- Two integrateddiscriminatorswith two PLL

- Integrateddeemphasis

4.4 - StandardIdentification

- Sequentialidentification.

- 2 identificationsequences:
PALmode, SECAMmode

- PALpriority

- the SECAM mode is locked after two identified
SECAMsequences

- the SECAM mode can be selectedin 50Hzonly

- Blanking of the (R-Y) and B-Y) outputs during
color searchmode.

5 - OTHER FUNCTIONS :

IF CONTROLS

5.1 - VolumeControl and Mute

Thevolumecontrolvoltagerangeon Pin10is from

0.5V to5V.

Alow voltageon Pin 10 (below 0.2V)will mute the
FM demodulatorof the IF circuit STV8224.

It will put thevolumeat theminimumleveland thus
there willbeno soundeitherinTVmodeor SCART
mode.

The volume control voltageand the mute levelare
controlledby the bus.

5.2- IF Standardand TV/SCARTMode Selection

The selection of IF standard (positive or negative
visionmodulation)andtheTV/SCARTmode iscon­trolledbythe bus.Theselectionis convertedinfour
voltageson Pin 21.

The lowest voltage selects the TV mode and the
NEGATIVEvision modulation.

The highest voltage (open collector output with
internalpull-upresistorto V

) selects the SCART

CC

mode and the NEGATIVE vision modulation.
The two other intermediate voltages select either

TV mode and POSITIVE vision modulation or
SCARTmode and POSITIVEvision modulation.

4/24

STV2112B

I2C BUS SPECIFICATION
GeneralComments

SlaveAddress: 8A(HEX)(1000101X)
WRITEMODEDATAFORMAT

Slave Address Register Address Data

1000 1010

(8A)

Thenot usedbits in data byte mustbe put to ”0”.

READ MODEDATAFORMAT

Slave Address Data

1000 1011

(8B)

MSB on the left, LSB on the Right.

MSB LSB

XXXXXXXX

X: not significantbit - S : significantbit

XXXS SSSS

(from 00 to 11HEX)

XXSS SSSS

(6 significant bits Max.)

SSSS SSSS

(8 significant bits)

InputSignals

(Write Mode)

VIDEO

Address

Dec (HEX)

0 (00) Contrast 5 XXX0 0000 = -20dB

0 (00) External Fast Blanking Enable 1 XXSX XXXX

1 (01) Saturation 6 XX00 0000 = -44dB

2 (02) Brightness 5 XXX0 0000 = -20%

2 (02) RGB Outputs Blanking 1 XXSX XXXX

3 (03) Red Drive Adjust (white point red adjust) 6 XX00 0000 = -6dB

4 (04) Red Cut-off Adjust 6 XX00 0000 = +150mV

5 (05) Green Drive Adjust (white point green adjust) 6 XX00 0000= -6dB

6 (06) Green Cut-off Adjust 6 XX00 0000 = +150mV

7 (07) Blue DriveAdjust (white point blueadjust) 6 XX00 0000 = -6dB

8 (08) Sharpness 3 XXXX X000 = Peaking Min.

Description

Data

(Bits)

Comments

XXX1 1111 = 0dB

0 = RGBext insertionenable
1 = RGBext insertiondisable

XX11 1111 = +6dB

XXX1 1111 = +20%

0 = Normal mode
1 = Blanking active

XX11 1111 = 0dB

XX11 1111 = -150mV

XX11 1111 = 0dB

XX11 1111 = -150mV

XX11 1111 = 0dB

XXXX X111 = PeakingMax.

5/24

STV2112B

I2C BUS SPECIFICATION(continued)
InputSignals (Write Mode) (continued)

CHROMA

Address

Dec (HEX)

9 (09) Not used

10 (0A) Standard Selection 4 XXXX SSSS

10 (0A) SVHS Selection 1 XXXS XXXX

Description

Data

(Bits)

0000 = PAL/XTAL1 (4.43MHz)
0100 = SECAM/XTAL1
011X = Auto/90

0001 = Not allowed
0010 = Not allowed
0011 = Not allowed
0101 = Not allowed
1000 = Not allowed
1001 = Not allowed
1010 = Not allowed
1011 = Not allowed
111X = Not allowed
1100 = Not allowed
1101 = Not allowed

0 = No SVHS (CVBS mode)
1 = SVHS mode

Comments

o

DEFLECTION

Address

Dec (HEX)

11 (0B) Horizontal Shift 6 XX00 0000 = -2.5µs

12 (0C) Vertical Amplitude 6 XX00 0000 = 1.2V

13 (0D) Vertical Position 3 XXXX X000 = 3.8V

13 (0D) 50/60Hz Selection 2 XXXS SXXX

13 (0D) Horizontal Output (HOUT) Safety 1 XXSX XXXX

14 (0E) PLL1 Time Constant 2 XXXX XXSS

14 (0E) Interlace 1 XXXX XSXX

14 (0E) 4/3 16/9 Selection 1 XXXX SXXX

Description

Data

(Bits)

XX11 1111 = +2.5µs

XX11 1111 = 6.2V

XXXX X111 = 6.3V

00 = Automode
01 = Not allowed
10 = 50Hz
11 = Not allowed

0 = Normal mode
1 = HOUT disabled (high level)

00 = Normal mode (Auto)
01 = Short time constant
10 = Very long time constant
11 = PLL1 inhibition(open loop)

0 = Interlace
1 = DE-Interlace

0 = 4/3 (V
1 = 16/9 (V

OUT-Low

OUT-Low

Comments

= 2V)

= 0.1V)

6/24

I2C BUS SPECIFICATION(continued)
InputSignals (Write Mode) (continued)

OTHERS

Address

Dec (HEX)

15 (0F) Volume 6 XX00 0000 = 0.5V

16 (10) Mute 1 XXXX XXXS

16 (10) IF Standard / AV Switch 2 XXXX XSSX

16 (10) Not Used 1 XXXX SXXX

16 (10) Cut-off Pulse Position 1 XXXS XXXX

17 (11) Only for Test 6 XXSS SSSS

Description

Data

(Bits)

XX11 1111 = 5V

0 = Mute not active
1 = Mute active

00 = INT/FM (negative)
01 = INT/AM (positive)
10 = EXT/AM (positive)
11 = EXT/FM (negative)

S = 0 default value

0 = lines 23/24/25in50Hz, 1 = Not allowed

00 0000 = Test mode notactive

STV2112B

Comments

OutputSignals

(ReadMode)

READ REGISTER

Description Data (Bits) Comments

Field Frequency 1 XXXX XXXS

Video Identification 1 XXXX XXSX

SVHS Status 1 XXXX XSXX

Standard Status 3 XXSS SXXX

Circuit Identification 2 SSXX XXXX

1 = 50Hz
0 = not 50Hz

1 = No Identification
0 = Video Identification

1 = No SVHS
0 = SVHS

111 = PAL/XTAL1 (4.43MHz)
110 = not to be used
101 = SECAM/XTAL1
011 = not to be used
010 = not to be used
X00 = Color off

11 = STV2118A/2116/2112
10 = STV2116A

01 = STV2112B

00 = STV2216

7/24

STV2112B

I2C BUS SPECIFICATION(continued)
Bus Register Initial Conditions

Notused bitsare presetto ”0”.

Address

Dec (HEX)

0 (00) XX01 0000 Mid. contrast ; RGBext insertionenable
1 (01) XX10 0000 Mid. saturation
2 (02) XX01 0000 Mid. brightness ; Blanking :normal mode
3 (03) XX10 0000 Mid. RED driveadjust
4 (04) XX10 0000 Mid. RED cut-off adjust
5 (05) XX10 0000 Mid. GREEN drive adjust
6 (06) XX10 0000 Mid. GREEN cut-offadjust
7 (07) XX10 0000 Mid. BLUE drive adjust
8 (08) XX00 0100 Mid. sharpness

9 (09) XX10 0000 Not used
10 (0A) XX00 0110 Auto search color standard ; no SVHS
11 (0B) XX10 0000 Mid. horizontal shift
12 (0C) XX10 0000 Mid. vertical amplitude
13 (0D) XX00 0100 Mid. vertical position ; Auto search field frequency ; HOUT : normal mode
14 (0E) XX00 0000 PLL1 time constant : normal mode ; Interlace; 4/3 selection
15 (0F) XX10 0000 Mid. volume
16 (10) XX00 0000 Mute not active ; INT/FM IF mode; Not used ;

17 (11) XX00 0000 Test mode not active

Data Initial

Value

Comments

Cut-off pulses on lines23/24/25 in 50Hz

8/24

STV2112B

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Value Unit

V

CC

T

oper

T

stg

Supply Voltage(Pins 22-42) (V
Operating Temperature 0, +70
Storage Temperature -55, +150

THERMALDATA

Symbol Parameter Value Unit

R

th(j-a)

Junction-ambient Thermal Resistance (PD= 1.3W) Typ. 40

CC1(22)

≤ V

)12V

CC2(42)

o

C/W

o

C

o

C

2112B-01.TBL

2112B-02.TBL

ELECTRICALCHARACTERISTICS

(V

CC

=9V,T

=25oC, unless otherwisespecified)

amb

Symbol Parameter Test Conditions Min. Typ. Max. Unit

SUPPLY

V
V

I

CC1

I

CC2

P

Video Supply Voltage (V

CC1

Chroma & Scanning & Bus Supply Voltage 8.1 9 9.9 V

CC2

V

Current Consumption 55 75 95 mA

CC1

V

Current Consumption PAL mode 50 70 90 mA

CC2

Power TotalDissipation 1305 1700 mW

tot

CC1

≤ V

) 8.1 9 9.9 V

CC2

LUMINANCE /CVBS INPUT (Pin 20)

DC

V

20PP

DC Operating Voltage No input signal 3.55 3.7 3.95 V

20

CVBS or Y Input Voltage 1 1.41 V

GY Luma Gain Contrast Max., Drive Max. 4.1 -

CTRY Luma Contrast Range 18 20 22 dB

-I
I

Negative ClampingCurrent During sync. pulse -20 -25 -35 µA

20

Clamping Current 5 10 µA

20

COMBINED CHROMINANCE ANDSVHS SELECTION INPUT (Pin 23)

V

V

CLIP23

V

DC23

V

TH23

I

low23

V

min23

G

Killer Colour Killer on Threshold

Chrominance Input Voltage Burst Amplitude,

23

100/75 colourbar

0.3 V

Input Amplitudebefore Clipping 1.0 V
DC Voltage SVHS mode 1.6 V
SVHS Threshold Voltage 0.5 0.7 V
Output Current 0V at Pin 23 120 170 µA
Minimum Burst Signal Amplitudewithin

30 mV

the ACC Control Range
ACC Control Range Change of Burstover whole

ACC

ACC control range < 2dB

30 dB

Burst amplitude on Pin 20 or

5

Pin 23, S/N > 40dB

Colour killer off hysteresis

+3

RGB INPUTS (Pins 12-13-14-16-17-18)

V

CLAMP

V

G

CTR

∆Black Difference of Black Level of Internal and

Clamp Level Contrast Max., Drive Nom. 1.5 1.8 2.1 V
RGB Input Voltage 0.7 1 V

RGB

RGB Gain Contrast Max., Drive Max. 4.0 -

RGB

RGB Contrast Range On external RGB (16-17-18) 11.5 dB

RGB

200 mV

External signals at the Outputs

I

RGB

Clamping Current 60 100 140 µA

mV

PP

PP

PP

PP

PP

dB

PP

2112B-03.TBL

9/24

STV2112B

ELECTRICALCHARACTERISTICS

(V

CC

=9V,T

=25oC, unless otherwisespecified) (continued)

amb

Symbol Parameter Test Conditions Min. Typ. Max. Unit

OSD FAST BLANKING INPUT (Pin 15)

V

THFB1-15

V

THFB2-15

T

swi1-15

T

swi2-15

I

FB-15

Insertion ThresholdVoltage 0.5 0.7 0.85 V
Blanking ThresholdVoltage 1.6 2.0 2.4 V
Insertion Switching Delay 30 ns
Blanking Switching Delay 50 ns
Input Current 0V at Pin 15 50 µA

EXTERNAL FAST BLANKING INPUT (Pin 19)

V

THFB-19

I

FB-19

T

swi-19

Threshold Voltage 0.5 0.7 0.85 V
Input Current 0V at Pin 19 50 µA
Switching Delay 30 ns

CATHODE CURRENT INPUT (Pin 30)

V

LEAK

V

Coff

V

SB

I

Low-30

Leakage Current Reference Voltage 1.80 2.0 V
Cut-off Current Reference Voltage

250 mV

refered to Leakage Current Reference
Start Beam Current Detection

2.1 2.3 V

Reference Voltage
Source current 150 250 µA

AUTOMATIC CUT-OFF CAPACITORS(Pins 24-25-26)

I

24-25-26

Control Current 70 100 130 µA

BEAM CURRENT LIMITER VOLTAGE (Pin 31)

V

TH1-31

V

TH2-31

V

TH3-31

CTR-BCL Contrast Attenuation at V

V

TH4-31

BRIG-BCL BrightnessAttenuation at V

CLP

Contrast Attenuation Starting 6.0 V
Brightness Attenuation Starting 5.5 V
Contrast Attenuation Ending 5.0 V

31=VTH3-31

14.0 dB

Brightness Attenuation Ending 4.5 V

31=VTH4-31

High ClampingVoltage 6.5 V

31

100 %

RGB OUTPUTS (Pins 27-28-29)

V

BW

Output SignalAmplitude (B to W) 0.7V B/W at Pin 20, Drive Max.,

Contrast Max., Brightness Typ.,

2.85 V

Saturation Typ.

I

S27-28-29

V

M27-28-29

V

Black27-28-29

Output SinkingCurrent 1.5 2 mA
Maximum Peak White Level 7.8 V
Blanking Level No load 0.3 0.45 0.6 V

RCO Cut-off Output Range 2 2.6 V

DCCO Cut-off Adjustment Range On Red and Green ouputs

300 mV

Pins 29 and 28, Drive Max.

DRIV Drive Adjustment Range 6.5 dB

R BRIG BrightnessRange Relative to B/W amplitude on

30 40 50 %

R,G,B outputs at Contrast Max.

∆V
∆V
∆V

CTR
SAT
REL

Variation of Black Level with Contrast 100 mV
Variation of Black Level with Saturation 50 mV
Relative Variation in Black Level

between the three Channels

- during Variation of Contrast(20dB)

- during Variation of Brightness
(total range)

Drive Max.

0

10

5

2040mV

- during Variation of Vcc (+/-10%)

∆VTemp Black Level Thermal Drift 1 mV/

mV
mV

o

C

2112B-04.TBL

10/24

STV2112B

ELECTRICAL CHARACTERISTICS

(V

CC

=9V,T

=25oC, unlessotherwisespecified)(continued)

amb

Symbol Parameter Test Conditions Min. Typ. Max. Unit

RGB OUTPUTS (Pins 27-28-29) (continued)

Track Tracking between Luminance and

Chrominance Signals

From Max. contrast (0dB)
to -10dBcontrast

2dB

Bwidth Bandwith of Output Signals at -3dB

- CVBS Input (no SVHS) PAL

- CVBS Input(no SVHS) SECAM

- Y Input SVHS Mode

- RGB Inputs

S/N Signalto Noise Ratio of Output (V

4.43MHz PAL Signal
on Y/CVBSInput

PP/VRMS

= 4.43MHz, Sharp Typ.

f

OSC

= 4.43MHz, no sharp

f

OSC

No trap Filter, Sharp Typ.

)

No signal on R-Y, B-Y inputs
Contrast Max., Drive Max.,
Saturation Typ., Sharp Typ.,

3.6

3.0
8

8

50 dB

Bandwidth 5MHz

Res Residual Frequency atf

at 2f

and Higher Harmonics

OSC

OSC

PAL/SECAM
PAL/SECAM

25
10

10050mV

FILTERS

V
V

TUN1
TUN2

Tuning Voltage Range (Pin 8) 3.2 to 4.8 V
Cloche Tuning Voltage Range (Pin 9) 2.5 to 6.5 V

Y DELAYLINE

t

t

d1p

t

d2

d3p

t

d4

Delay TimePAL SVHS mode 330 370 400 ns
Delay TimeSECAM SVHS mode 500 540 580 ns
Delay TimePAL CVBS mode 390 425 460 ns
Delay TimeSECAM CVBS mode 550 590 630 ns

SHARPNESS CIRCUIT (PAL only)

f

G

Sharp

Sharp

Center Frequency SVHS mode 2.5 MHz
Gain Variation from Min. to Max.Sharp at f

Sharp

6dB

Overshoot Amplitude Variation compared to B/W 2T pulse, Sharp Max. 150 %

Pre-shoot Amplitude Variation compared to B/W 2T pulse, Sharp Max. -15 %

After-shoot Amplitude Variation compared to B/W 2T pulse, Sharp Max. -40 %

Coring Coring Range comparedto B/W 10 %

Y TRAPFILTER

f

Trap

Trap Frequency PAL -0.2 f

OSC

+0.2 MHz

Trap Frequency SECAM -0.2 4.25 +0.2 MHz

Q

Trap

Trap Quality Factor
(Q=1/(fo/f-3dB - f-3dB/fo))

Sharpness Min.
Sharpness Max.

1.7
3

CRejPN Color Subcarrier Rejection PAL mode, Sharpness Min. 20 dB

CrejS Color Rejection SECAM Mode at 4.1MHz

at 4.4MHz

18
18

CHROMINANCE BANDPASS

f

Q

Center Frequency -0.25 f

C

Bandpass Quality Factor 2.8 3.5 4.2 -

BP

osc

+0.25 MHz

CLOCHE FILTER

f

Cloche

Q

Cloche

Resonant Frequency 4.286 MHz
Cloche Quality factor 14 16 18 -

ACC CAPACITOR (Pin 5)

I

C5

I

L5

Charging Current During burst gate window 250 µA
Leakage Current 0.2 1 µA

CHROMA PLL (Pins 2-3)

CR

Catching Range Q = 4.43MHz (Pin 3) ±600 Hz

2-3

MHz
MHz
MHz
MHz

mV

dB
dB

PP
PP

-

-

2112B-05.TBL

11/24

STV2112B

ELECTRICALCHARACTERISTICS

(V

CC

=9V,T

=25oC, unless otherwisespecified) (continued)

amb

Symbol Parameter Test Conditions Min. Typ. Max. Unit

PLL LOOP FILTER (Pin 4)

I
I

Control Current During burstgate window 400 µA

C4

Leakage Current 5 µA

L4

COLOR DIFFERENCE OUTPUT SIGNALS (Pins 40-41)

PAL DEMODULATOR

o

V

V

G

V

P40

P41

PAL

PNDC

R-Y Outputsignal Amplitude (Pin40) |RED-BLUE| axes = 90

100/75 colour bar

B-Y Output SignalAmplitude (Pin 41) |RED-BLUE| axes = 90

100/75 colour bar

Gain Ratioof both Demodulators (B-Y)/(R-Y) |RED-BLUE| axes = 90

100/75 colour bar

Output Voltagewhen colourkilled 5.6 5.8 6.0 V

0.40 0.52 0.60 V

o

0.50 0.66 0.80 V

o

1.15 1.27 1.45 -

SECAM DEMODULATORS

V
V

G

SECAM

V

R-Y OutputSignal Amplitude (Pin40) 100/75 Colour Bar 0.8 1.05 1.20 V

S40

B-Y Output SignalAmplitude (Pin 41) 100/75 Colour Bar 1.00 1.33 1.40 V

S41

Gain Ratioof both Demodulators (B-Y)/(R-Y) 1.00 1.27 1.35 ­Output Voltagewhen colourkilled 5.4 5.6 5.8 V

SDC

PAL /SECAM MATRIX

G/R (G-Y)/(R-Y) -0.6 -0.51 -0.4 -

G/B (G-Y)/(B-Y) -0.28 -0.19 -0.15 -

SATURATION CONTROL

SAT

SAT

SAT

Maximum Saturation Control (3F) 1VPPCVBS on Pin 20 5 +6.5 8 dB

Max.

Nominal Saturation Control (20) 1VPPCVBS on Pin 20 0 dB

Nom.

Minimum SaturationControl(00) 1VPPCVBS on Pin 20 -44 dB

Min.

COLOUR DIFFERENCE INPUT SIGNALS (Pins 38-39)

DCRYI DC Voltage Pin 39 No colour 2.6 2.8 3.0 V

DCBYI DC Voltage Pin 38 No colour 2.6 2.8 3.0 V

VRYI Input SignalAmplitude Pin 39 100/75 color bar 1.05 V
VBYI Input SignalAmplitude Pin 38 100/75 color bar 1.33 V

I

CL38-39

Clamping Current During burst key 150 µA

SYNC. SEPARATOR

VSync Sync. Pulse Amplitude On Pin 20 50 300 mV

HORIZONTAL OSCILLATOR

f

f

Rang

f

Frequency afterDivider 50Hz input signal 15625 Hz

H50

Frequency Control Range Low Frequency
Free RunningFrequency when PLL1 open Value 03hex

free

High Frequency

in register0Ehex

14500
16100

14850
16300

15000 15800 Hz

15200
16500HzHz

FIRST LOOP FILTER (Pin33)

I

LOW-33

I

HIGH

I

VLOW

Long TimeConstant Output Current 0.12 0.15 0.18 mA
Short TimeConstant Output Current 0.35 0.45 0.55 mA
Very LongTime Constant 0.02 0.03 0.05 mA

SECOND CONTROL LOOP

CRQ

t

shift

Control Range from Startof Horizontal

2

Output toFlyback
Horizontal Shift Range 4 µs

Horizontal position
centered

2to 14 µs

PP

PP

PP
PP

PP
PP

2112B-06.TBL

12/24

STV2112B

ELECTRICALCHARACTERISTICS

(V

CC

=9V,T

=25oC, unless otherwisespecified) (continued)

amb

Symbol Parameter Test Conditions Min. Typ. Max. Unit

LINE FLYBACKINPUT/SANDCASTLE OUTPUT (Pin 37)

V

V

t

t

V

TH1-37

V

TH2-37

SCO

CL37

WBG

dBG

I

Output Voltageduring Burst Key 4.0 5.0 V
Clamped Input Voltage during Flyback 2.5 3.1 V
Burst KeyPulse Width 3.7 3.8 3.9 µs
Delayof Start of Burst Keyto Startof Sync. 5.2 µs
Blanking ThresholdVoltage 0.5 0.7 0.9 V
PLL2 ThresholdVoltage referred to Line

Level V

CL37

Input Current During flyback pulse 0.1 1 mA

37

PLL2VTH/V

CL37

80 %

HORIZONTAL OUTPUT (Pin 36)

T

W36

V

Low36

V

CC StartVCC Start

V

CC StopVCC Stop

I

36 Max.

V

36 Max.

T

Output PulseWidth Normal operation 26 28 30 µs
Voltage Output Low R pull-up = 1kΩ 1.1 V

Level Voltage on Pin 42 6.7 V

Level : hysteresis Voltage on Pin 42,

V

CCstart-VCCstop

0.60 V

Maximum Allowed Output Current 10 mA
Maximum Allowed Output Voltage

(open collector)
Output PulseDuty Cycle in soft-start

ss

mode (Thigh/(Thigh + Tlow))

V
(V

CC2

CC1

= 9V, V

rising)

CC1

< 6.0V

78 %

12 V

VERTICAL OUTPUT (Pin 35)

T

V

Low35

W35

Output PulseWidth 10.5 Lines
Low Level Output Voltage 4/3

Low Level Ouput Voltage 16/9

XXXX0XXX (bin)in Reg. 0Ehex
XXXX1XXX (bin)in Reg. 0Ehex

1.5 2

0.1

2.5

0.5

FR35 Locking Range 248 352 Lines

f

FR-50

V

HIGH35

I

sink

Free Frequency (no Video Signal) 50Hz 314 Lines
High Level Range

(vertical position control)
Output SinkingCurrent 4/3

XXXXX000(bin) in Reg. 0Dhex
XXXXX111(bin) in Reg. 0Dhex

16/9

3.5

5.7

3.8

6.3

0.2

0.5

4.2

7.0

VERTICAL AMPLITUDE CONTROL (Pin 34)

V

Output VoltageRange XX000000(bin) in Reg. 0Chex

34R

XX111111(bin) in Reg. 0Chex

1.0

5.6

1.2

6.2

1.5

6.7

VOLUME CONTROL AND MUTE (Pin 10)

V

Output VoltageRange

R10

(volume control)

XX000000(bin) in Reg. 0Fhex
XX111111(bin) in Reg. 0Fhex

0.35

4.2

0.5

4.7

0.7

5.2

MUT Output Voltage when MUTE 0.02 0.1 V

V
V

V
V

mA
mA

V
V

V
V

2112B-07.TBL

13/24

STV2112B

ELECTRICAL CHARACTERISTICS

(V

CC

=9V,T

=25oC unlessotherwisespecified)(continued)

amb

Symbol Parameter TestConditions Min. Typ. Max. Unit

IF STANDARD CONTROL & SWITCH SELECTION (Pin 11)

V

TV/NEG

V

TV/POS

V

Start/Pos

V

Start/Neg

R

TV/Neg

R

TV/Pos

R

Scart/Pos

R

Scart/Neg

2

I

C BUS INPUTS (Pins6-7)

V

TH6-7

C

I

Leak6-7

Output Voltagein TV Mode and
Negative Vision Modulation

Output Voltagein TV Mode and
Positive VisionModulation

Output Voltagein SCART Mode and
Positive VisionModulation

Output Voltagein SCART Mode and
Negative Vision Modulation (open collector mode)

Output Resistance in TV Mode and
Negative Vision Modulation

Output Resistance in TV Mode and
Positive VisionModulation

Output Resistance in Scart Mode and
Positive VisionModulation

Output Resistance in Scart Mode and
Negative Vision Modulation (pull-up resistorto V

Threshold Voltage 1.5 2.25 3 V
Capacitance of each Pin 5 10 pF

L6-7

Leakage Current Write Mode,

VCC= 9V 0.1 0.7 V

VCC= 9V 2.90 3.37 3.80 V
VCC= 9V 5.20 5.62 6.10 V

VCC= 9V 7.88 9 V

200 Ω

6.7 kΩ

11 kΩ
18 kΩ

)

CC

0 levelon SDA or SCL

50 µA

2112B-08.TBL

14/24

USER CONTROLS
Figure1 : ContrastControl Curve

%

120

STV2112B

Figure2 : SaturationControl Curve

%

250

100

80

60

40
20

0

00 10 1F

Code (HEX)

Figure3 : BrightnessControl Curve

%

30

20

10

0

(10)
(20)

200

150

100

50

0

00 20 3F

2112B-03.EPS

10 30

Code (HEX)

Figure 4 : PeakingControl (2T overshoot)

%

160
150

140
130
120

110
100

2112B-04.EPS

(30)

00 10 1F

Code (HEX)

Figure5 :

Output Voltage (Pin 10)

6

5

4

3

2

1
0

00 20 3 F

2112B-05.EPS

VolumeControlCurve

10 30

Code (HEX)

90

07

123 456

Code (HEX)

2112B-07.EPS

2112B-06.EPS

15/24

STV2112B

INPUT/OUTPUTPIN CONFIGURATION
Figure6 : Pins2, 3 - CXTL1,SELECT

V

CC2

Pins 2-3

Figure7 : Pin 4 - CLPF

V

CC2

4

Figure8 :

Figure10 :

Pin 5 - ACC

Pin7 - SCL

V

CC2

GND2

GND2

V

CC2

GND2

2112B-08.EPS

Figure9 :

Pin 6 - SDA

V

CC2

2112B-09.EPS

6

5

2112B-10.EPS

Figure11 :

GND2

Pin8 - FTUN1

V

CC2

V

CC1

2112B-11.EPS

16/24

GND2

8

7

2112B-12.EPS

GND2

2112B-13.EPS

INPUT/OUTPUTPIN CONFIGURATION(continued)
Figure12 : Pin9 - FTUN2

V

CC2

9

Figure13 : Pin10 - Volume

V

CC2

STV2112B

10

GND2

Figure14 : Pin11- SWI

V

CC2

11

GND2

Figure16 : Pins15,19 - FBOSD,FBEXT

V

CC1

GND2

2112B-14.EPS

Figure15 : Pins12,13,14,16,17,18- RGBInputs

V

CC1

Pins 12-13-14

16-17-18

2112B-16.EPS

GND1

Figure17 : Pin20 - Y/CVBS

V

CC1

V

CC2

2112B-15.EPS

2112B-17.EPS

GND1

Pins 15-19

20

2112B-18.EPS

GND1

2112B-19.EPS

17/24

STV2112B

INPUT/OUTPUTPIN CONFIGURATION(continued)
Figure18 : Pin23 - CHR/SVHS

V

CC2

V

CC1

23

Figure19 : Pins24, 25, 26 - CG, CR, CB

V

CC1

Pins 24-25-26

30

Figure20 :

Figure22 :

V

CC1

GND2

Pins27, 28, 29 - BO,GO, RO

V

CC1

Pins 27-28-29

GND1

Pin31 - BCL

V

CC1

2112B-20.EPS

Figure21 :

2112B-22.EPS

Figure23 :

GND1

Pin30 - ICAT

GND1

Pin32 - SXTL

2112B-21.EPS

V

CC1

30

2112B-23.EPS

V

CC2

18/24

GND1

31

32

2112B-24.EPS

GND2

2112B-25.EPS

INPUT/OUTPUTPIN CONFIGURATION(continued)
Figure24 : Pin33 - SLPF

V

CC2

33

Figure25 : Pin34 - VAMP

V

STV2112B

CC2

34

Figure26 :

Figure28 :

Pin 35 - VOUT

V

CC2

Pin37 - LFB/SC

GND2

V

CC2

GND2

35

2112B-26.EPS

Figure27 :

2112B-28.EPS

Figure29 :

GND2

Pin36 - HOUT

GND2

Pins38, 39 - BYI, RYI

V

CC2

V

CC1

2112B-27.EPS

V

CC2

36

2112B-29.EPS

GND2

37

Pins 38-39

2112B-30.EPS

GND2

2112B-31.EPS

19/24

STV2112B

INPUT/OUTPUTPIN CONFIGURATION(continued)
Figure30 : Pins40, 41 - RYO, BYO

V

CC2

Figure31 : Pins42, 22 - V

CC2,VCC1

GND2

Pins 40-41

V

CC2

42

1

V

CC1

22

21

GND2 GND1

2112B-32.EPS

2112B-33.EPS

20/24

APPLICATIONDIAGRAM

100nF

330kΩ

FROM

OSD

+

TXT

OBLK
(ove rsize
blan king)

FROM

EXTERNAL

RGB

TO Pin42

I2C BUS

TO STV8224

3.9k

3.9k

3.9k

2.2k

Ω

Ω

Ω

Ω

SDA

SCL

VOL

SWI

390

390

390

1kΩ

75

75Ω

75

270k

Ω

100Ω100

Ω

47pF

100

Ω

47pF

Ω

Ω

Ω

Ω

Ω

18k

Y/CVBS

Input 1V

Ω

4.7nF

PP

3.58MHz

1

3.3pF

2

3

4.43MHz
4

33nF

5

6

7

8

100nF

9

100nF

10

11

22nF

12

22nF

13

22nF

14

15

22nF

16

22nF

17

22nF

18

19

220nF

20

75

Ω

21 22

GND2

S ELEC T

CXTL1

CLPF

SDA

SCL

FTUN1

FTUN2

VOL

SWI

BOSD

GOSD

ROSD

FBOSD

BEXT

GEXT

REXT

FBEXT

Y/CVBS

GND1

F

470

µ

16V

100nF

S
T
V
2
1
1
2

B

CHR/S VHS

100nF

470

F

µ

16V

V

BYO

RYO

RYI

LFB/SC

HOUT

VOUT

VAMP

SLPF

S XTL

BCL

ICAT

V

STV2112B

9V

1

2

42

CC 2

10nF

41

10nF

40

10nF

39

10nF

38

BYIACC

37

36

35

34

33

503kHz

32

31

30

RO

29

GO

28

BO

27

100nF

CR

26

100nF

25

CB

100nF

CG

24

23

1k

CC 1

9V

1k

47k

470

470

470Ω

Ω

9V

Ω

Ω

Ω

Ω

10nF

TO
DEFLECTION
STAGES

F

1

µ

50V

220k

Ω

75

Ω

15k

Ω

1µF

4.7k

18k

Ω3.3nF

22k

Pin 22

CHROMA INPUT (S-VHS)

3

4

5

4.7nF
6

78

9V

4.7kΩ

Ω

1N4148

Ω

Pin 42

TO
CRT
AMPLIFIERS

S
T
V
2
1
8
0

100nF

14

13

12

11

100nF

10

9

Ω

680

1N4148

1N4148

100nF

1nF

LFB (He ater)

FROM
HORIZONTAL
STAGE

9V

4.02k
1%

10

Ω

F

47

µ

16V

Ω

75

Ω

Notes :

- STV2112B requires only 1 XTAL(4.43MHz).

- Recommended 4.43MHz XTAL is JAUCH Number 10080082.

- XTAL2 selection pin (Pin 2) : werecommend the connection toVCC2 (Pin 42).
Inthe case of STV2112B version, this pin can be left open.

2112B-34.EPS

21/24

STV2112B

90oCRT APPLICATIONSVERTICALSTAGE

22

VOUT

(From STV2112B

Pin 35)

VAMP

(From STV2112B

Pin 34)

1k

+12V

15k

Ω

Ω

Ω

1000µF
25V

100nF

1N4148100k

47nF

47µF

25V

15k

3.9k

270

1.8kΩ

+9V

BC547

Ω

2W

Ω

Ω

Ω

27k

15k

Vertical Yoke

470

Ω

1000µF
25V

1.2

Ω

620k

620k

Ω

Ω

160k

330k

Ω

1.3k

Ω

Ω

Ω

220nF2.2

Ω

4.7k

1

OUT

2

V+

Ω

3

V.SYNC

4

V.SIZE

T

D

5

GND

Ω

47nF

6

SAW

A

1
7
7

7

10kΩ

8

BUFF

FEEDB

1

+9V

56k

470k

Ω

100k

Ω

BC557

OPTIONAL4/3 - 16/9 SWITCHING

4.7µF

100k

Ω

Ω

BC547

560k

9

V

100µF

Ω

+24V

1000µF
25V

35V1N4004

CC

10

FLYB

2112B-35.EPS

22/24

110oCRT APPLICATIONS: Vertical System with East-West

CC

HFLY

220k

R28
100

C36
10nF

6.2k

R56

Ω

R45

Ω

R43
1k

Ω

+12V

Ω

V

CC

R2
10
3W

C5
2200µF

R46
100k

From

STV2112B

Pin35

+12V

+9V

C20

47µF

SCL

SDA

VOUT

R81

2.4k

100pFF

Ω

C34

T5

BC547

R52

4.7kΩ
C56

220nF

R3

330

Ω

R31

330

330

470

R18

R17

R30

Ω

1

SCL

Ω

2

SDA

Ω

3

VRET

S ENS M

SENS P

FROUT

100

16

15

14

S

REG

V

CC

LPF

CVER T

GND

T
V
2
1
4
5

4

V

CC

5
C44
220nF

6
C48

4.7nF

7
C51
33nF

89

EWOUT

EWIN

OBLK

HFLY

BREATH

13

12

11

10

C54
1nF R54

Vertical
Yoke

R19

1.2

Ω

R20

3.6

Ω

Ω

C39
10nF

C37
1nF

R57

22k

Ω

V

R55

100k

Ω

680k

Ω

Ω

C46

3.3nF

R50

1.5k

1N4148

Ω

D8

BCL

C4
1000µF
25V

T6
TIP122

Ω

V

CC

OBLK

R12

1.5

Ω

C10
220nF

R47
39k

Ω

R41

3.3k

Ω

To STV2112B
Pin15

+24V

D2

1N4148

D4

1N4148

C31

1.5nF

E/W MODULATOR

C68

4.7µF
160V

C43
22pF

1000µF

C23

100µF

D1

1N4004

R36

3.3k

10k

R26

35V

+24V

C9

Ω

Ω

STV2112B

IN-

1

V

2

CC

FLYBACK

3

GND

4

OUT

5

OUTV

6

CC

IN+

7

+12V

T
D
A

8

1

7

2

2112B-36.EPS

23/24

STV2112B

PACKAGE MECHANICAL DATA

42 PINS - PLASTICSHRINK DIP

A2

A1

E

E1

LA

42

1

Dimensions

BeB1

D

22

21

c

SDIP42

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

e1
e2

E

.015
0,38

Gage Plane

e3
e2

A 5.08 0.200
A1 0.51 0.020
A2 3.05 3.81 4.57 0.120 0.150 0.180

B 0.36 0.46 0.56 0.0142 0.0181 0.0220
B1 0.76 1.02 1.14 0.030 0.040 0.045

c 0.23 0.25 0.38 0.0090 0.0098 0.0150

D 37.85 38.10 38.35 1.490 1.5 1.510

E 15.24 16.00 0.60 0.629
E1 12.70 13.72 14.48 0.50 0.540 0.570

e 1.778 0.070

e1 15.24 0.60
e2 18.54 0.730
e3 1.52 0.060

L 2.54 3.30 3.56 0.10 0.130 0.140

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 parties whichmay result from
its use. No licence is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previouslysupplied.STMicroelectronicsproducts are notauthorizedfor use ascriticalcomponentsin lifesupport devicesor systems
without express written approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics

PMSDIP42.EPS

SDIP42.TBL

1998 STMicroelectronics - All Rights Reserved



2

Purchase of I

Rights to use thesecomponents in aI

C Components of STMicroelectronics,conveys a licenseunder the PhilipsI2C Patent.

2

the I

C StandardSpecifications as defined byPhilips.

2

C system,is granted providedthat the system conformsto

STMicroelectronics GROUP OF COMPANIES

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