SAA7191B Ver la hoja de datos (PDF) - Philips Electronics
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SAA7191B Datasheet PDF : 40 Pages
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Philips Semiconductors
Digital Multistandard Colour Decoder,
Square Pixel (DMSD-SQP)
Product specification
SAA7191B
1 FEATURES
• Separate 8-bit luminance (Y or CVBS) and 8-bit
chrominance inputs (CVBS or C) from CVBS, Y/C,
S-Video (S-VHS or Hi8) sources
• Luminance and chrominance signal processing for
standards PAL-B/G, NTSC-M, SECAM
• Horizontal and vertical sync detection for all standards
• Real-time control output RTCO to be used for
frequency-locked digital video encoder (SAA7199B).
RTCO contains serialized information about actual clock
frequency, subcarrier frequency and PAL/SECAM
sequence.
• Controls via the I2C-bus
• User programmable aperture correction (horizontal
peaking)
• Compatible with memory-based features (line-locked
clock)
• Cross-colour reduction by chrominance comb-filtering
(NTSC) or by special cross colour cancellation
(SECAM)
• 8-bit quantization of input signals
• 768/640 active samples per line equals 50/60 Hz (SQP)
• The YUV bus supports data rates of 780 × fH equal to
12.2727 MHz for 60 Hz (NTSC-M) and 944 × fH equal to
14.75 MHz for 50 Hz (PAL-B/G, SECAM) in 4 : 1 : 1 or
4 : 2 : 2 formats (via the I2C-bus)
• One crystal oscillator of 26.8 MHz
2 GENERAL DESCRIPTION
The SAA7191B is a digital multistandard colour decoder
suitable for 8-bit CVBS input signals or for 8-bit luminance
and 8-bit chrominance input signals (Y/C).
The SAA7191B is down-compatible with SAA7191. The
SAA7191B has additional outputs RTCO, GPSW0 and
ODD. These new outputs are in high-impedance state
when NFEN-bit = 0.
3 QUICK REFERENCE DATA
SYMBOL
VDD
IDD
VIL
VOL
Tamb
PARAMETER
positive supply voltage (pins 5, 18, 28, 37 and 52)
total supply current (pins 5, 18, 28, 37 and 52)
input levels
output levels
operating ambient temperature
MIN.
4.5
0
TYP. MAX.
5
5.5
100 250
TTL-compatible
TTL-compatible
-
70
UNIT
V
mA
°C
4 ORDERING INFORMATION
EXTENDED TYPE
NUMBER
SAA7191B
PINS
68
PIN POSITION
PLCC
PACKAGE
MATERIAL
plastic
CODE
SOT188-2
August 1996
3
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