RGB Encoder
Description
CXA1645P/M
RGB Encoder For the availability of this product, please contact the sales office.
Description The CXA1645P/M is an encoder IC that converts analog RGB signals to a composite video signal.
This IC has various pulse generators necessary for encoding.
Composite video outputs and Y/C outputs for the S terminal are obtained just by inputting composite sync, subcarrier and analog RGB signals.
It is best suited to image processing of personal computers and video games.
Features • Single 5V power supply • Compatible with both NTSC and PAL systems • Built-in 75Ω drivers (RGB output, composite video output, Y output, C output) • Both sine wave and pulse can be input as a subcarrier.
• Built-in band pass filter for the C signal and delay line for the Y signal • Built-in R-Y and B-Y modulator circuits • Built-in PAL alternate circuit • Burst flag generator circuit • Half H killer circuit Applications Image processing of video games and personal computers Block Diagram and Pin Configuration
GND2 24 ROUT 23 GOUT 22 BOUT 21 CVOUT 20 VCC2 19 FO 18 YTRAP 17 YOUT 16 COUT 15 VREF 14 IREF 13
24 pin DIP (Plastic)
24 pin SOP (Plastic)
Structure Bipolar silicon monolithic IC Absolute Maximum Ratings 14 V • Supply voltage VCC • Operating temperature Topr –20 to +75 °C • Storage temperature Tstg –65 to +150 °C • Allowable power PD CXA1645P 1250 mW dissipation CXA1645M 780 mW Recommended Operating Condition Supply voltage VCC1, 2 5.
0 ± 0.
25
V
VIDEO OUT R-OUT G-OUT B-OUT
Y/C MIX
75 DRIVER
75 DRIVER REGULATOR
DELAY
CLAMP
SYNC ADD BPF R-Y Modulator
MATRIX
B-Y Modulator PHASE SHIFTER PULSE GEN
CLAMP
CLAMP
CLAMP
SIN-PULSE
1 GND1
2 RIN
3 GIN
4 BIN
5 NC
6 SCIN
7 NPIN
8 BFOUT
9 YCLPC
10 SYNCIN
11 NC
12 VCC1
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Application circuits shown, if any, are typical examples ill...
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