cxa1645p

Manufacturer Part Numbercxa1645p
DescriptionRgb Encoder
ManufacturerSony Electronics
cxa1645p datasheet
 


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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 75 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
ROUT
GOUT
BOUT
24
23
22
21
R-OUT
G-OUT
B-OUT
CLAMP
CLAMP
CLAMP
1
2
3
4
GND1
RIN
GIN
BIN
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.
CXA1645P/M
24 pin DIP (Plastic)
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings
• Supply voltage
• Operating temperature Topr
• Storage temperature
• Allowable power
dissipation
Recommended Operating Condition
Supply voltage
CVOUT
V
2
FO
YTRAP
CC
20
19
18
17
VIDEO
Y/C
OUT
MIX
SYNC
DELAY
CLAMP
ADD
R-Y
Modulator
B-Y
Modulator
PHASE
SIN-PULSE
SHIFTER
5
6
7
8
NC
SCIN
NPIN
BFOUT
– 1 –
24 pin SOP (Plastic)
V
14
V
CC
–20 to +75
°C
Tstg
–65 to +150
°C
P
CXA1645P 1250 mW
D
CXA1645M
780 mW
V
1, 2 5.0 ± 0.25
V
CC
YOUT
COUT
V
I
REF
REF
16
15
14
13
75
75
DRIVER
DRIVER
REGULATOR
BPF
PULSE
GEN
9
10
11
12
YCLPC
SYNCIN
NC
V
1
CC
E93411A41-ST

cxa1645p Summary of contents

  • Page 1

    ... RGB Encoder For the availability of this product, please contact the sales office. Description The CXA1645P 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 ...

  • Page 2

    ... GND1 80k 68k Pin for switching between NTSC and PAL modes 3k NTSC: V 32k GND1 pulse monitoring output. Incapable of driving a 75 load. 129 25µ 25µ GND1 – 2 – CXA1645P/M Externally applied voltage Description , PAL: GND CC ...

  • Page 3

    ... Refer to Notes on Operation. Nos. 4 and 10 Pin to determine the internal reference current. Connect to GND via a 47k resistor. 129 50µ GND1 Internal reference voltage. Connect a decoupling capacitor of approximately 10µF. Refer to Notes on Operation, Nos. 4 and 7. GND1 – 3 – CXA1645P/M Description 0.8V): SYNC period 2.0V) ...

  • Page 4

    ... No influence on the YOUT pin. GND1 Refer to Notes on Operation, No. 8. Input resistance 1. Internal filter fo adjustment pin. Connect to GND via the following resistor according to the NTSC or PAL mode. NTSC: 20k (±1%) 129 PAL : 16k (±1%) 50µ GND1 – 4 – CXA1645P/M Description ...

  • Page 5

    ... CC 500µ Analog RGB signal outputs. Capable of driving a 75 load. 5.5k Refer to Notes on Operation, Nos. 6 and 9. 200µ GND1 GND2 Ground for RGB, composite video and Y/C output circuits. The leads to GND1 should be as short and wide as possible. – 5 – CXA1645P/M Description ...

  • Page 6

    ... F SG1 to SG3: 100% color bar input SG5 20k 1.0Vp-p (Max.) SG5: CSYNC TTL level B/C SG1 to SG3: DC direct coupling 2. 20k 1.0Vp 200kHz/5MHz Pin 9 = Clamp voltage – 6 – CXA1645P/M Min. Typ. Max. Unit Fig 0.64 0.71 0.78 Vp-p Fig –3.0 dB Fig. 3 0.26 ...

  • Page 7

    ... SIN wave, 3.58MHz SG4 5V SG5 20k 0.5Vp-p SG5: CSYNC TTL level 3.58MHz component measured. Fig. 6 SG1 to SG3: No signal, SG4: SIN wave, 4.43MHz SG4 GND SG5 16k 0.5Vp-p SG5: CSYNC TTL level – 7 – CXA1645P/M Min. Typ. Max. Unit 0.2 0.25 0.3 Vp-p 2.84 3.16 3.48 94 104 114 deg 2.65 2.95 3 ...

  • Page 8

    ... CXA1645P/M ...

  • Page 9

    ... BIN C point 0.5Vp-p CVOUT 3.58MHz (B) 4.43MHz t 2. (BN) 0.8V A point COUT Vo (BN (B) Vo (BN) K (BP (BN) Vo (BN) – 9 – CXA1645P/M 2.0V 64µs 0.8V 10µs 1.0Vp-p 1.0Vp-p 1.0Vp-p Vo (YB (YG) (YS) Vo (YR) Fig. 4 0.5Vp 3.58MHz 2.0V 64µs 0.8V 1.0Vp-p 1.0Vp-p 1.0Vp (CR) R/ (BN) ...

  • Page 10

    ... VIDEO MIX DRIVER OUT SYNC DELAY CLAMP ADD R-Y Modulator B-Y Modulator PHASE SIN-PULSE SHIFTER SCIN Metal film resistor ±1% – 10 – CXA1645P OUT 220µ 47k 0.1µ 10µ DRIVER REGULATOR BPF PULSE GEN 0.1µ ...

  • Page 11

    ... Pin 15 as the C signal. At the same time, Y and C signals are mixed and output from Pin 20 as the composite video signal. Burst Signal The CXA1645P/M generates burst signals at the timing shown below according to the composite sync signal input. H synchronization SYNC ...

  • Page 12

    ... Notes on Operation Be careful of the following when using the CXA1645P/M. 1. This IC is designed for image processing of personal computers and video games. When using the IC in other video devices, make thorough investigations on image quality sure that analog RGB signals are input at 1.0Vp-p maximum and have low enough impedance. High impedance may affect color saturation, hue, etc ...

  • Page 13

    ... Small C Low Large 17 C Small Low L load" means that the pin can drive a capacitor +75 75 220µF PIN 75 driver pins, so oscillation is likely to occur when measures described in – 13 – CXA1645P Decide the values +75 ...

  • Page 14

    ... COPPER / 42 ALLOY DIP024-P-0400-A 2.0g PACKAGE WEIGHT 24PIN SOP (PLASTIC) + 0.4 15.0 – 0 0.1 0.2 – 0.05 1.27 ± 0.12 M PACKAGE STRUCTURE MOLDING COMPOUND EPOXY/PHENOL RESIN LEAD TREATMENT SOLDER PLATING SOP-24P-L01 SOP024-P-0300-A LEAD MATERIAL COPPER ALLOY / 42ALLOY 0.3g PACKAGE WEIGHT – 14 – CXA1645P/M 0° to 15° + 0.4 1.85 – 0.15 0.15 + 0.2 0.1 – 0.05 ...