AN5693 View Datasheet(PDF) - Panasonic Corporation

Part Name

Description

Manufacturer

AN5693

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

Panasonic Corporation 

ICs for TV

AN5693K

s Pin Equivalent Circuit(continued)

Pin No.

Equivalent Circuit

Function

Status

30

−Y

5.1 V

100 µA

80 µA

10 kΩ

9V

(VCC1)

5V

(VCC3)

80 kΩ

Black level detecion output pin blanking

off switch pin :

• For black expansion circuit's black

level detection output filter pin

• For removing the blanking period and

DC

abuot 5.1 V

To black

expansion

circuit

30

To

blanking

circuit

180 kΩ

R

4.7 µF

75 kΩ

10 kΩ

holding the darkest Y level

• By changing the external resistor, R,

the black level expansion sensitivity

can be changed. When R is bigger, area

of response is smaller

• To stop black expansion circuit, set

Pin30 voltage to about VCC(9 V)

• If Pin30 voltage is GND, blanking is

off.(Black expansion is also off)

31

Video Input Pin :

AC

47 kΩ

4.3 V

9V

(VCC1)

50 µA

• Video signal input pin

(Composite video also allowable)

• Standard input 0.6 VPP

0.6 VPP

31

1.8 kΩ

• Sync. top is clamped to 3.5 V

• Video signal is inputed to low impedance

10 µA

43 kΩ

inputs

32

5 V Vertical Synchronous Signal Clamp Pin :

AC

4.3 V

16 kΩ

(VCC3)

3 kΩ

50 kΩ

• This is the peak clamp pin for vertical

synchronous signal separation

• The integration of the vertical

f = fV

200 Ω

4 kΩ

R1

680 kΩ

To ver.

R2

220 Ω

270 Ω count down

32

C1

2.2 µF

synchronous signal is determined by

the internal time constant, but the

external time constant, R1, C1, is chosen

according to the required trigger timing

• Using R1 > 200 kΩ

• R2 is the resistor which is used to

control the emitter current

21

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