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Sony Semiconductor Electronic Components Datasheet

CXA1645P Datasheet

RGB Encoder

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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


Sony Semiconductor Electronic Components Datasheet

CXA1645P Datasheet

RGB Encoder

No Preview Available !

CXA1645P/M
Pin Description
Pin
No.
Symbol Pin voltage
1 GND1
0V
Equivalent circuit
VCC1
Externally applied voltage
Description
Ground for all circuits other than RGB,
composite video and Y/C output circuits.
The leads to GND2 should be as short and
wide as possible.
2 RIN
3 GIN
4 BIN
Black level
when
clamped
2.0V
2
3
4
5 NC
Analog RGB signal inputs. Input
100%, = 1Vp-p (max.). To minimize clamp
error, input at as low impedance as
possible.
ICLP turns ON only in the burst flag period.
GND1
ICLP
NO CONNECTION
VCC1
6 SCIN
20P 20k
6
129 20k
Subcarrier input.
Input 0.4 to 0.5Vp-p sine wave or pulse.
Refer to Notes on Operation, Nos. 3 and 5.
2.5V
100µ
GND1
7 NPIN
1.7V
VCC1
80k
7
3k
68k
Pin for switching between NTSC and PAL
modes
NTSC: VCC, PAL: GND
32k
GND1
VCC1
8
BFOUT
H : 3.6V
L : 3.2V
8
129
25µ
25µ
GND1
BF pulse monitoring output. Incapable of
driving a 75load.
–2–


Part Number CXA1645P
Description RGB Encoder
Maker Sony Corporation
Total Page 14 Pages
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