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 

AN5693K

ICs for TV

s Pin Equivalent Circuit(continued)

Pin No.

Equivalent Circuit

Function

Status

33

Pin33 : Vertical Sync. Separation Input Pin

34

Pin34 : Horizontal Sync. Separation

16 kΩ

5V

(VCC3)

Input Pin

• Pin33, 34 internal circuits are similar

16 kΩ

16 kΩ

• Usually, vertical synchronous threshold

2 VPP

RV

560 Ω

1 µF

33

RH

270 Ω

CV

680 pF

34

CH

1200 pF

0.1 µF

20 µA 20 µA

To H sync. is deeper than horizontal synchronous'

sep.

To V sync. threshold. Thus RV > RH

sep.

• RH and CH determine cutoff frequency

at about 500 kHz

1.3 V

• R → big, threshold becomes deeper

(Sync. compression is weaker).

R → small, threshold becomes shallower

(fluctuation becomes weaker due to

vertical sag)

Sync. top is clamped at 1.3 V

AC

2 VPP

35



VCC3 (typ.5V) :

DC

• For chroma and jungle circuit

5V

36

Chroma

signal

1000 pF

9V

10 kΩ

36

12.5 pF

15 kΩ

2.5 V

5V

(VCC3)

To

Chroma

amp.

50 µA

9V

(VCC1)

Chroma Signal Input Pin

Black Expansion Starting Point

Adjustment Pin :

• Pin36 is chroma signal input pin and

external DC voltage is applied to adjust

the starting point of black expansion

AC + DC

Burst typ.

300 mVPP

DC typ.

4.5 V

10 kΩ

100 µA

To

black level

expansion

25 µA

37



GND :

DC

• For video,chroma and jungle circuit

0V

38

100 µA

5V

(VCC3)

FBP Input Pin :

AC

50 µA • The FBP input pin is for horizontal

FBP

50 µA 100 µA

blanking and AFC circuit

• Threshold level for

1.9 V

24 kΩ To

AFC

0.7 V

60 kΩ

To

HBLK

40 kΩ

HBLK : 0.7 V

AFC : 1.9 V

• External DC 1.3 V must be applied to

become all blanking

40

kΩ

38

• Input voltage below 0 V is prohibited

50 µA

22

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