AN5693K 查看數據表（PDF） - Panasonic Corporation

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AN5693K

Luminance,Chroma and Sync. Signals Processing IC(with Built-in I2C bus Interface)for PAL/NTSC Color-TV

Panasonic Corporation 

AN5693K

ICs for TV

s Pin Equivalent Circuit

Pin No.

Equivalent Circuit

Function

Status

1

2

3 C-Y

CCP

150 µA

9V

(VCC1)

300 Ω Pin 1,2,3

300 Ω

0.068 µF

Brightness

control

Pin1 : Color Difference Clamp Pin(R−Y)

Pin2 : Color Difference Clamp Pin(G−Y)

Pin3 : Color Difference Clamp Pin(B−Y)

• Input from Pin51, 52, the color

difference signals are clamped according

to brightness control voltage

• The clamp pulse uses internal clamp

pulse

DC

about 7 V

4

5V

Killer Filter Pin :

DC

(VCC3) • Killer detection circuit's filter pin

about 3.3 V

Killer 3.3 V

det.

circuit 1 V

4

137 kΩ

270 Ω

2.5 V 1.0 MΩ

(operate during BGP period)

• Below 2.8 V, killer is on(no color

output)

BGP

9 V(VCC1)

0.47 µF

2.8 V

100 µA

5

5 V (µ-com. VCC)

Killer Output Pin :

DC

• Killer detection circuits output pin

Killer on

33 kΩ

175 Ω

5

to

Floating

µ-com. resistor

40 µA

10 kΩ

Killer

On

Off

• Pin5 pull-up resistor, 33 kΩ, is connected

to MICOM's VCC.

0.2 V

Killer off

5V

6

3.3 V

APC

det.

circuit 1 V

BGP

max. 1mA

VCO circuit

5V

(VCC3)

40 kΩ

6

SW 2.2 µF

2.5

V

7.5

R

kΩ

270 Ω

APC Filter Pin :

DC

• APC detector circuit's filter pin

about 2.5 V

(operate during BGP period)

• As external resistor, R, becomes larger,

detection sensitivity becomes larger

(pull in becomes easier. Interference

by noise becomes easier)

β curve

fC

V6

• During SECAM mode, the 40 kΩ is

shorted to stop APC circuit's operation

16

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