STV2246 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STV2246 Datasheet PDF : 86 Pages
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STV224X, STV228X, STV223X - ELECTRICAL CHARACTERISTICS
Symbol
Pre-shoot
Aft-shoot
Coring
Parameter
Amplitude Variation compared to
B/W amplitude
Amplitude Variation compared to
B/W amplitude
Coring Range compared to B/W
Test Conditions
2T pulse, Max. peaking, coring ON
2T pulse, Max. peaking, coring ON
Coring ON
Min. Typ. Max. Unit
40
%
40
%
10
%
4.6.3 Black Stretch Control (Pin BS)
See Figure 12
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
BSth1
Black Stretch Threshold referred to
B/W amplitude
Y/CVBS inputs: 0.7V B/W, No set-up
50
%
BSMax.
Maximum expansion referred to
B/W amplitude
Y/CVBS inputs: 0.7V B/W, No set-up
-15
%
BSVMax. Black Stretch Control Voltage
Max. black stretch
2.6
V
) BSVMin. Black Stretch Control Voltage
No black stretch
3.3
V
t(s I100IRE Discharging current
Y = 100IRE
8
µA
I0IRE Charging Current
Y = 0IRE
35
µA
uc 4.6.4 Y Output
rod Symbol
Parameter
Yout-DC Black level
P Yout-amp Black to White Amplitude
lete Yout-BW Luma Path Bandwidth
bso Yout S/N Signal to Noise Ratio (VPP/VRMS)
Test Conditions
Peaking nominal
SVHS mode/Trap-off
CVBS, PAL/NTSC 4.43MHz
CVBS, SECAM
CVBS, PAL/NTSC 3.58MHz
Bandwidth 5MHz,
Peaking Min.,coring ON
Min.
Typ.
3.7
0.7
Max.
0.99
Unit
VBW
V
8
2.7 3.5
2.5 3.1
2.5 3.0
50
MHz
dB
- O 4.7 FILTERS
) 4.7.1 Y Trap Filter
t(s Symbol
Parameter
c fTRAP-PN Notch Frequency
u fTRAP-S Notch Frequencies
rod fTRAP-ACC Notch Frequency Accuracy
P QTRAP Trap Quality Factor
CrejPN Color Subcarrier Rejection
te CrejS Color Rejection in SECAM Mode
ole4.7.2 Chrominance Bandpass
bs Symbol
Parameter
Test Conditions
PAL/NTSC
SECAM fnb
SECAM fnr
Min.
Q = 1/ (f0/f-3dB - f-3dB/f0), Peaking
Min.
PAL/NTSC
20
From 4.1 to 4.6 MHz
At 3.9 MHz
10
Typ.
fOSC
4.2
4.5
1.5
20
Max.
3.5
Test Conditions
Min. Typ. Max.
Unit
MHz
MHz
%
-
dB
dB
Unit
fBP
Center Frequency
QBP Bandpass Quality Factor
Register 12h, d3-d0 = 0000
-5% fOSC +5% MHz
2.8 3.5 4.2
-
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