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STV2248H 数据表(PDF) 34 Page - STMicroelectronics

部件名 STV2248H
功能描述  I짼C BUS-CONTROLLED MULTISTANDARD SINGLE CHIP TV PROCESSOR
PDF  86 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STV2248H 数据表(HTML) 34 Page - STMicroelectronics

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STV224XH/228XH/223XH - ELECTRICAL CHARACTERISTICS
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4.6.3 Black Stretch Control (Pin BS)
See Figure 12
4.6.4 Y Output
4.7 FILTERS
4.7.1 Y Trap Filter
4.7.2 Chrominance Bandpass
Pre-shoot
Amplitude Variation compared to
B/W amplitude
2T pulse, Max. peaking, coring ON
40
%
Aft-shoot
Amplitude Variation compared to
B/W amplitude
2T pulse, Max. peaking, coring ON
40
%
Coring
Coring Range compared to B/W
Coring ON
10
%
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
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
I100IRE
Discharging current
Y = 100IRE
8
µA
I0IRE
Charging Current
Y = 0IRE
35
µA
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Yout-DC
Black level
3.7
VBW
Yout-amp Black to White Amplitude
0.7
0.99
V
Yout-BW Luma Path Bandwidth
Peaking nominal
SVHS mode/Trap-off
CVBS, PAL/NTSC 4.43MHz
CVBS, SECAM
CVBS, PAL/NTSC 3.58MHz
8
2.7
2.5
2.5
3.5
3.1
3.0
MHz
Yout S/N
Signal to Noise Ratio (VPP/VRMS)
Bandwidth 5MHz,
Peaking Min.,coring ON
50
dB
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
fTRAP-PN
Notch Frequency
PAL/NTSC
fOSC
MHz
fTRAP-S
Notch Frequencies
SECAM fnb
SECAM fnr
4.2
4.5
MHz
fTRAP-ACC Notch Frequency Accuracy
3.5
%
QTRAP
Trap Quality Factor
Q = 1/ (f0/f-3dB - f-3dB/f0), Peaking
Min.
1.5
-
CrejPN
Color Subcarrier Rejection
PAL/NTSC
20
dB
CrejS
Color Rejection in SECAM Mode
From 4.1 to 4.6 MHz
At 3.9 MHz
10
20
dB
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
fBP
Center Frequency
Register 12h, d3-d0 = 0000
-5%
fOSC
+5%
MHz
QBP
Bandpass Quality Factor
2.8
3.5
4.2
-



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