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CXA1645P Datasheet PDF - Sony Corporation

Part Number CXA1645P
Description RGB Encoder
Manufacturers Sony Corporation 
Logo Sony Corporation Logo 



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CXA1645P datasheet, circuit
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.
24 pin DIP (Plastic)
24 pin SOP (Plastic)
Features
Single 5V power supply
Compatible with both NTSC and PAL systems
Built-in 75drivers
(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
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings
Supply voltage VCC 14
V
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
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
YTRAP
YOUT
COUT
VREF
18 17 16 15 14
IREF
13
R-OUT
G-OUT
B-OUT
VIDEO
OUT
Y/C
MIX
DELAY CLAMP
75 75
DRIVER DRIVER
REGULATOR
SYNC
ADD
R-Y
Modulator
BPF
CLAMP CLAMP CLAMP
SIN-PULSE
B-Y
Modulator
PHASE
SHIFTER
PULSE
GEN
1 2 3 4 5 6 7 8 9 10 11 12
GND1
RIN
GIN
BIN
NC
SCIN
NPIN
BFOUT YCLPC SYNCIN
NC
VCC1
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E93411A41-ST

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CXA1645P equivalent
CXA1645P/M
Pin
No.
Symbol Pin voltage
19 VCC2
5.0V
Equivalent circuit
Description
Power supply for RGB, composite video and
Y/C output circuits. Decouple this pin with a
large capacitor of 10µF or above as a high
current flows.
Refer to Notes on Operation, Nos. 4 and 10.
20
CVOUT
Black level
1.2V
20
VCC2
VCC1
600µ
20k
Composite video signal output. Capable of
driving a 75load.
Refer to Notes on Operation, Nos. 6 and 9.
GND2
500µ
21 BOUT
22 GOUT
23 ROUT
Black level
1.7V
21
22
23
5.5k
24 GND2
0V
VCC2
VCC1
200µ
GND1
GND2
Analog RGB signal outputs. Capable of
driving a 75load.
Refer to Notes on Operation, Nos. 6 and 9.
Ground for RGB, composite video and Y/C
output circuits. The leads to GND1 should
be as short and wide as possible.
–5–

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Information Total 14 Pages
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