Multimedia ICs
Color TV Signal Encoder
BA7232FS
The BA7232FS converts analog RGB signals into color TV signals in the NTSC and PAL formats. From inputs of
analog RGB signals, a composite synch signal, burst pulses and a color carrier, this IC generates a color TV signal,
and can be adapted for either NTSC or PAL standards, which are selected externally. When set to PAL, the
BA7232FS changes chroma phase according to the burst flag pulses.
The chroma signals and luminosity signals can be combined into a color TV signal or output separately, making this
IC suitable for S pins. Also, this IC comes with an output pin for the analog RGB signal. Each output has a built-in
75鈩?driver.
鈥?/div>
Applications
TV peripherals
鈥?/div>
Featuresadapted for NTSC and PAL formats.
1) Can be
2) Internal flip-flop for PAL phase switching.
3) Separate Y / C output pins.
4) Analog RGB signal output pins.
5) Internal 75鈩?driver. (outputs color TV signals, lumi-
nosity signals, chroma signals and analog RGB sig-
nals)
6) Adaptable for color subcarrier pulse input.
鈥?/div>
Block diagram
BIN
1
CLAMP
BFP
GIN
2
CLAMP
BFP
RIN
3
CLAMP
BFP
V
CC
MATRIX
BURST
GEN.
V
CC
SYNC
16
PHASE
GEN.
SYNCOUT
17
V
CC
2
V
CC
1
4
75鈩?/div>
18
ROUT
75鈩?/div>
19
GOUT
75鈩?/div>
20
BOUT
SYNC
SYNCIN
5
B - Y MOD.
R - Y MOD.
SYNC
MIX
BFPIN
6
75鈩?/div>
15
YOUT
NT / PAL
7
F鈥
14
N.C.
Y/C
MIX
SCIN
8
FILTER
75鈩?/div>
13
VOUT
GND1
9
GND
12
N.C.
COUT
10
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