AN5192 데이터 시트보기 (PDF) - Panasonic Corporation

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AN5192

Single chip IC with I2C bus Interface for PAL/NTSC color TV system

Panasonic Corporation 

AN5192K

ICs for TV

s Terminal Equivalent Circuits

Pin No.

Equivalent circuit

1

2

3

C-Y

9V

(VCC1)

300 Ω pin 1, 2, 3

300

Ω

0.068 µF

BGP

150 µA

Brightness

control

4

5V

(VCC3)

Killer

det.

circuit

3.3 V

1V

4

137 kΩ 270 Ω

2.5 V

Description

I/O

Pin 1: Color difference signal clamp

pin (R-Y)

Pin 2: Color difference signal clamp

pin (G-Y)

Pin 3: Color difference signal clamp

pin (B-Y)

• Color difference signal inputted from

pin 63, 64 is clamped according to

brightness control voltage.

• Clamp pulse uses internal clamp pulse

(BGP)

DC

approx. 7 V

Killer filter pin

• Filter pin for killer detection circuit

(operates for BGP period)

• Killer turned On (Without color output)

2.8 V or less

DC

approx. 3.3 V

BGP

2.8 V

0.47 µF

9V

100 µA

5

VCC for microcomputer

(5 V)

Killer output pin

DC

• Output pin of killer detection circuit Killer On

33 kΩ

175 Ω

5

To microcomputer

Floating

resistor

Killer

40 µA On

10 kΩ

Off

• Connect 33 kΩ load resistor of pin 5

to microcomputer VCC

0.2 V

Killer Off

5V

6

Pin for APC filter

DC

• Filter pin for APC detection circuit approx. 2.5 V

(operates for BGP period)

5V

(VCC3)

• Detection sensitivity becomes large

when external R→large (Tends to

3.3 V

pull-in easily. Tends to be affected

APC

det.

circuit

6

40 k

1V

Ω SW

R

2.5 V 7.5 kΩ

by noise)

β curve

BGP

max. 1 mA

VciCrcOuit

270 Ω

fC

V6

• When SECAM, APC circuit is stopped

by short circuiting 40 kΩ resistor

16

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