BA7232FS Datasheet, PDF (1/6 Pages) Rohm – Color TV Signal Encoder

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
75Ω driver.
•^Applications
TV peripherals
•^Features
1) Can be adapted for NTSC and PAL formats.
2) Internal flip-flop for PAL phase switching.
3) Separate Y / C output pins.
4) Analog RGB signal output pins.
•^{Block diagram}
5) Internal 75Ω driver. (outputs color TV signals, lumi-
nosity signals, chroma signals and analog RGB sig-
nals)
6) Adaptable for color subcarrier pulse input.
BIN 1
GIN 2
RIN 3
VCC1 4
SYNCIN 5
CLAMP
BFP
CLAMP
BFP
CLAMP
BFP
75Ω
20 BOUT
75Ω
19 GOUT
75Ω
18 ROUT
MATRIX
VCC
SYNC
17 VCC2
16 SYNCOUT
BFPIN 6
75Ω
15 YOUT
NT / PAL 7
SCIN 8
FILTER
14 N.C.
75Ω
13 VOUT
GND1 9 GND
COUT 10
75Ω
12 N.C.
GND _{11 GND2}
1