SGS Thomson Microelectronics STV2110B Datasheet
STV2110B
PAL-SECAM LUMA-CHROMA& DEFLECTIONPROCESSOR
PRELIMINARY DATA
■
RGB ANDFAST BLANKINGINPUTS
■
AUTOMATIC CUT-OFF CONTROL
■
DC-CONTROLLED BRIGHTNESS, CONTRAST
AND SATURATION
■
CERAMIC 500kHz VCO FOR LINE DEFLECTION
■
CHROMA STANDARD AUTOMATIC IDENTIFICATION
■
BIDIRECTIONAL I/O FOR CHROMA STANDARD
■
PHASE-LOCKED REFERENCE OSCILLATOR
USING ASTANDARD 4.43MHz
■
OSD CAPABILITYON OUTPUTS
■
VIDEO IDENTIFICATIONGENERATOR
DESCRIPTION
The STV2110Bis a PAL-SECAMchromadecoder,
videoand H/V deflection processorfor CTV.
UsedwiththeTDA8222,this ICpermitsacomplete
lowcost solutionwith external output stages.
It is pincompatible with STV2102BPAL only processor.
SHRINK 42
(Plastic Package)
ORDER CODE : STV2110B
PINCONNECTIONS
GREEN CUT-OFF CAPACITOR
SUPPLYVOLTAGE
HORIZONTAL Vcc
GREENOUTPUT
BLUE OUTPUT
BLUE CUT-OFF CAPACITOR
LUMINANCE SIGNAL INPUT
SCANNING LOOP FILTER
SCANNING XTAL
COMPOSITEVIDEO SIGNAL
LINE FLYBACK INPUT
VERTICAL OUTPUT
HORIZONTAL OUTPUT
CONTRAST CONTROL
SECAMCHROMA INPUT
GROUND GND
DELAY CHROMA INPUT
CHROMA STANDARD I/O
Vcc
BLKBLANKING INPUT
COG
ROUTRED OUTPUT
HVcc
GOUT
BOUT
COB
YIN
SLPF
SXTL
CVBS
LFB
VOUT
HOUT
CTR
SECIN
PALINPAL CHROMA INPUT
DLI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PS
21
ICAT CATHODECURRENT
42
SUPPLY VOLTAGE INPUT
Vcc
41
BLUE INPUT
BIN
40
GIN GREEN INPUT
39
RED CUT-OFF CAPACITOR
COR
38
RIN REDINPUT
37
BRIGHTNESS CONTROL
BRIG
36
FAST BLANKING INPUT
FBL
35
34
33
32
31
30
29
28
27
26
25
24
23
22
CHROMA LOOP FILTER
CLPF
CHROMA XTAL
CXTL
PAL KILLER CAPACITOR
CKP
F425
4.25MHzFILTER
ACC ACC CONTROLCAPACITOR
RED DEEMPHASIS CAPACITOR
CDR
4.40MHz FILTER
F440
SATURATION CONTROL
SAT
CDB
BLUEDEEMPHASIS CAPACITOR
F432 4.32MHz FILTER
GROUND
GND
CKS
SECAM KILLER CAPACITOR
CHROMA OUTPUT
DLO
2110B-01.EPS
April 1996
This is advance information on a new product now in development or undergoingevaluation. Detailsare subject to change without notice.
1/15
STV2110B
BLOCK DIAGRAM
BRIG
CTR
BIN
GIN
RIN
FBL
SAT
35 16 36
ROUT
4
STV2110B
Blk. RGB
CONTRAST
GOUT
BOUT
6
7
BRIGHTNESS BLANKING
+ CLAMP
MATRIX
COR
COG
3388
RGB
CUT-OFF
MEAS.
LEAK. CURRENT
MEAS.
TUBE TEMP
RGB
SWITCH
SATURATION
COB
ICAT
42
BLK
2
BLANKING
COMPENSATION
DECODER
SEPARATOR
FRAME SYNC.
PAL
FLIP-FLOP
SECAM
DEMODULATION
VOUT
14
FRAME
OUTPUT
LINE
COUNTER
SECAM
FLIP-FLOP
SECAM
IDENTIFICATION
HOUT
15
LINE
OUTPUT
SHIFT
PHASE
PHASE
COMP. 2
BURST
GENERATOR
VCO
DIVIDER
PHASE
COMPARATOR 1
SYNC.
SEPARATOR
MUTE
PERMUTATOR
SAT
CONTROL
STANDARD
SXTL
SLPF
LFB
CVBS
F440
CDR
F432
CDB
F425
3121 26 29 28
CKS
23
PS
2/15
BLACK
INSERTION
CC
HV
5
CC
V
CC
V
YINPUT
CONTRAST
12741 37 39 40
9
YIN
BLACK
REFERENCE
CLAMP
PAL
DEMODULATION
XVCO
33
CXTL
– 90DEG
PHASE
DETECTOR
34
CLPF
KILLER
BURST
DETECTOR
30
ACC
32
CKP
DL
MATRIX
ACC
18
PALIN
17
SECIN
DLI
DLO
22 252024 1312 10 11
GND
19
GND
2110B-02.EPS
FUNCTIONAL DESCRIPTION
DEFLECTION
SynchronizationSeparator
The synchronization separator is based on the
bottom of synchronizationpulses alignment to an
internal reference voltage. An external capacitor
permitstoalign synchro.pulses,two externalresistors determinesthe detectionthresholdof synchro
pulses. The frame synchronization pulses are
locked to a 32µs referencesignal to perfect interlacing.
HorizontalScanning
Thehorizontalscanningfrequencyisobtainedfrom
a 500kHz VCO. The circuituses twophase-locked
loops (PLL). The first onecontrols the frequency;
the second one, fully integrated, controls the relative phase of the synchronization and the line flyback signals.
The first PLLhas two times constants: a long time
constant during the picture to have a good noise
immunity, a short timeconstantat the beginningof
the frame to recapturefaster the phase in case of
VCR video signal. More over, the PLL is in short
time constantthree lines before frame pulses occured, it permits to ensure good interlacing when
the video signalcomes from a VCR tape with high
phase error.
The horizontal output signal is 28µs width. On
starting up, horizontal pulses are enabled at
= 6.8V. On shutting down, horizontal pulses
V
CC
are inhibited for V
CC
=6.2V.
VerticalScanning
The windows for the frame sync detection are
generatedby a count down system. Theselection
of the windows is determinedby the IC status :
- videoidentificationoff - window: 248/314
- videoidentificationon - window: 248/352
When a sync pulse is detected inside the window
a 10.5 lines longpulse is providedto V
OUT
pin.
The count downsystem provides also the needed
signals for the time constant switch, the line PLL
inhibitionand servicesignals to the rest of the IC.
CHROMA
ACC Amplifier, DL Matrix, Permutator and Demodulator
The correct chroma subcarrier input, issued from
bandpassorbellfilter,isinternallyselectedwith the
standa rd. The ACC amplifier envolves three
stages : the first one select the correct input, the
second one the -6dB in picture (PAL mode), the
third one is controledby the ACC voltage.
STV2110B
The dynamic rangeis over than 30dB.
The chrominance output signal is fed to the delay
line.
- PALmode :
the adding and substracting direct and delayed
signalsare performedby the DL matrix function.
Two synchronous demodulators multiplies
the (B-Y) signal with the 0 degree phase
4.43MHz reference signal and the (R-Y) signal
with the alternate ±90 deg. 4.43MHz phase referencesignal.
- SECAM mode :
thepermutatorseparatesthetwo(B-Y)and(R-Y)
subcarriers.These signals are demodulatedby
two FM demodulators with two external L, C
centered on f
4.406MHz.
4.43MHz Phase Locked Loop
The oscillating frequency of the 4.43MHz crystal
oscillator is controlledby the output voltage of the
loop filter. The phase detector will lock the 90 degree reference signal to the direct burst signal.
A 90 degree phase shifter permits to recover the
0 degree reference signal. Aflip-flopdriven by line
pulses permits to generate the alternate ±90 degree signal.
ACC Control and Color Killer
PALmode :
the directburst signalis demodulatedwiththe ±90
degree reference signal. The demodulationresult
is used by ACCcontrol and killer function.
SECAM mode:
ACC control is done by a X
identificationthe burst signals of the red and blue
lines are demodulated by the external LC connected on Pin 31, it is centered at4.32MHz. This
give positive and negative signals which are inverted by the signal coming out of the SECAM
flip-flop.
In both standard, if the demodulationresult is always positive, the killer capacitor is charged and
the standard is identified (color ON). When demodulation resultis alwaysnegative, the killer capacitorvoltage reachestheflip-flop inhibitionlevel,
so the alternace sequence is reversed and the
capacitor is charged again.
In case of no video signal, both killer capacitors
voltage are maintained about V
color offthreshold.
In PAL or SECAM, the ACC control voltage is
obtainedby thepeakdetectionof the demodulated
burst.
= 4.25MHz and f
O(blue)
O(red)
2
demodulator. For
/2, below the
CC
=
3/15
STV2110B
FUNCTIONAL DESCRIPTION (continued)
AutomaticStandard Identification
Thecircuitis alternatelyforcedineachmode during
two fields (PAL mode, SECAM mode disabled or
SECAM mode,PALmode disabled).
If PALsignalisidentified,thealternatePAL/SECAM
sequency is locked in PALmode.
To have a SECAM identification, the circuit must
memorizesa first SECAM identification, than test
the PALmodeand confirma secondSECAM identification. The SECAM identificationwill take from
four to six fields.
OutputPin 21,namedPS,ishighlevelinPALmode
and low level in SECAMmode.
Forced standard : Pin 21 can be used for the
purpose:
- Pin 21 to HVCC : PAL mode
- Pin 21 to ground : SECAMmode
VIDEO
Input Stage
The luminance input is controlled by the contrast
controlstage whichrange is 20dB.
The luminance and color difference signals are
added in the video matrixcircuit toobtain the color
signals.
Thecolor signalsare sent to anRGB switch which
willdrive to theoutputs eitherinternal RGB signals
or external RGB signals.
Automatic Cut-off Control
Theblack levels ofthe RGBoutputsare controlled
withthe cut-offloopsduring threeline periodsafter
the frame retrace. The cut-off measurements are
sequentiallyachievedduringthese threelines.The
leakage current measurement is achieved during
the frame retrace and memorized on an internal
capacitor, thus the circuit is able to extract the
cut-offcurrentfrom thetotal currentmeasurement.
Warm-upDetector
At the start-up, the cut-off loops are switch off, a
whitelevel isinserted onthe luminancesignaluntil
a cathode current is detected. Then the cut-off
loopsare released.
RGB Inputs
To avoid the black level of the inserted signal
differing from the black level of the normal video
signal,the external RGB are clamped to the black
level of the luminance signal. Therefore, an AC
coupling isrequired for the RGB inputs.
The RGB inputs are controlled by a 12dB range
contrast controlstage.
ABSOLUTEMAXIMUM RATINGS
Symbol Parameter Value Unit
HV
V
H
T
T
Horizontal Supply Voltage (Pin 5) 12 V
cc
Video & Chroma Supply Voltage (Pins 1-41) HVCC+ 0.5 V
cc
Horizontal Output (Pin 15) 12 V
OUT
Storage Temperature -55, +150
stg
Operating Temperature 0, +70
oper
THERMAL DATA
Symbol Parameter Value Unit
R
th (j-a)
Junction-ambient Thermal Resistance Max. 60
DC AND AC ELECTRICALCHARACTERISTICS
(HV
CC=VCC
Symbol Parameter Test Conditions Min. Typ. Max. Unit
HV
cc
V
cc
I
cch
I
ccv&c
P
D
=9V,T
Scanning Supply Voltage (Pin5) 8.1 9 9.9 V
Video & Chroma Supply Voltage (Pins 1-41) 8.1 9 9.9 V
Scanning Supply Current (pin 5) No load 25 35 mA
Video & Chroma Supply Current (Pins 1-41) No load 45 55 mA
Total Power Dissipation No load 630 890 mW
=25oC unlessotherwise specified)
amb
o
C/W
o
C
o
C
2110B-01.TBL
2110B-02.TBL
2110B-03.TBL
4/15
STV2110B
DC AND AC ELECTRICALCHARACTERISTICS (continued)
(HV
CC=VCC
=9V,T
Symbol Parameter Test Conditions Min. Typ. Max. Unit
LUMINANCE INPUT (Pin 9)
V
V
G
InputVoltage 350 490 mV
BW9
DC Level No input signal 2.6 V
DC9
InputCurrent •During burst period
I
g
Luma Gain 7.4
9
BW467 Bandwidth (Y to R, G, Boutputs) -3dB 6 MHz
CONTRAST CONTROL (Pin16)
V
V
16 (Max.)
G
Contrast Control Voltage 2 to 4 V
16
Allowed Control Voltage 5 V
ContrastControl Range 20 dB
16
InputCurrent 10 µA
I
16
BRIGHTNESS CONTROL (Pin 36)
V
V
36 (Max.)
Brightness Control Voltage 1.8 to 4.3 V
36
Allowed Control Voltage 5 V
InputCurrent 10 µA
I
36
SATURATION CONTROL INPUT (Pin27)
V
V
27 (Max.)
G
V
Saturation Control Voltage 2 to 4 V
27
Allowed Control Voltage 5 V
Saturation Control Range -50 dB
27
Mute Level 0.5 V
27M
InputCurrent 10 µA
I
27
RGB OUTPUTS (Pins 4-6-7)
V
BW 4-6-7
I
4-6-7
VM
V
blank4-6-7
V
CO min.
V
CO max.
Output Signal Amplitude
(black to white)
Individual Output Sinking Current 2 mA
Maximum Peak White Level 7.8 V
4-6-7
Blanking Level 0.5 V
Minimum Level of Inserted Cut-offLines 2.5 V
Maximum Level of Inserted Cut-off Lines 4.5 V
Relative Variation in Black Level with Various
CONT. SAT. BRIG between the 3channels
∆V
Black Level Thermal Drift 0.5 mV/oC
temp
Tracking between Luminance and Chrominance
Signals over 10dBContrast Control
RGB INPUTS (Pins 37-39-40)
V
BW37-39-40
V
clamp
37-39-40
I
37-39-40
I
i37-39-40
BW
37-39-40
G
G
37-39-40
InputAmplitude (B to W) 0.7 2 V
Clamp Level Contrast max 1.8 V
ControlCurrent ±150 µA
Leakage Current 1 µA
Bandwidth -3dB 8 MHz
RGB Contrast Control Range 14 dB
CTR
RGB Gain 3.7
=25oC unless otherwisespecified)
amb
•Out of burst period
•0.35V B to W @ Pin 9
•Contrast @ 4V
•Sat. & Brig. @3V
±150
1
2.6 V
20 mV
2dB
PP
µA
µA
2110B-04.TBL
5/15
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