AN5337 查看數據表（PDF） - Panasonic Corporation

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AN5337

NTSC Video Signal Processor IC

Panasonic Corporation 

ICs for TV

s Pin Descriptions (cont.)

Pin No.

Pin name

Waveform

46

Sync.in (V)

Synchronization : 6.2V

Lock Det. filter

47

Asynchronization : 0V

Shut down : 8.3V

AN5337K

Description

Slice level is variable

with external resistor.

Input for sync. signal

separation

V slice level :

2.6µA × 6kΩ ×

58.5µs/5µs=183mV

Equivalent circuit

VCC 9V

68kΩ

68pF

46

6kΩ

2V

2.6µA

VCC 9V

200Ω

90kΩ

Filter for synchroniza-

tion detection of input

sync. and horizontal

200Ω

oscillation frequency.

47

Also for shut down

10kΩ

detection

1µ0A0

200Ω

Sand castle

pulse input/FBP

48

input for AFC

Sand castle

49

pulse output

50

Flyback pulse

input

Input of superimposed

burst gate pulse and

vertical/horizontal blank-

4.3V ing

3.0V

1.5V • Threshold voltages

Burst gate pulse : 3.5V

Horizontal blanking pulse

: 2.2V

Vertical blanking pulse

: 1.0V

AFC : 2.5V

Output of superimposed

burst gate pulse which

4.3V superimposed V, H and

3.0V blanking pulse, to syn-

1.5V chronize the AN5307K

with other ICs

• Threshold voltage

Same as above

BGP

HBLK

VCC 5V VBLK

Internal

External

300Ω

48

50kΩ

VCC 5V

49

25kΩ

63.5µs

10 to 13µs

Input of flyback pulse

• Threshold voltage

Blanking : 0.7V

VCC 5V

100Ω

50

HBLK

External

Internal

AFC2

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