LA75520KVA Просмотр технического описания (PDF) - SANYO -> Panasonic

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производитель

LA75520KVA

IF Signal Processing (VIF+SIF) IC that Supports the PAL Video Standard for TV Sets and VCRs

SANYO -> Panasonic 

LA75520KVA

System changeover

a. SIF system SW

The SIF system can be changed over by setting A (pin 7) and B (pin 9) to GND and OPEN respectively.

A

B

BG

GND

GND

GND

OPEN

OPEN

GND

OPEN

OPEN

O

FM DET

I

DK

MN

De-emphasis

LEVEL

O

6dB

75μs

O

0dB

50μs

O

0dB

50μs

0dB

50μs

Note : Circles mean that the system indicated with a circle is selected

b. IF system SW

The IF frequency becomes 38.9MHz when pin 10 is open.

The IF frequency becomes 38.0MHz when pin 10 is set to GND.

The IF frequency becomes 39.5MHz when pin 10 is set to VCC.

c. Split/inter carrier SW

Inter-carrier is selected by setting the 1st SIF input (pin 13) to GND.

d. Reference frequency changeover SW

The reference frequency becomes 4.43MHz when pin 11 is OPEN.

The reference frequency becomes 4.0MHz when 270kΩ is connected between pin 11 and GND.

e. AFT mute level, trap point shift SW

By changing the pin 15 voltage, the potential and TRAP point at which AFT is muted can be set to either just or shift

(about +220kHz).

Pin 15 potential

VCC to 4V

4V to 2.5V

2.5V to 1V

1V to GND

* VCC=5V

AFT mute potential

MIDDLE (VCC/2)

MIDDLE (VCC/2)

HI (VCC)

HI (VCC)

TRAP point shift

Just

Shift

Just

Shift

f. FM detector function not used

To stop FM detection VCO without using the SIF circuit, short-circuit pin 1 – GND with resistance of 1kΩ or less.

No.A0654-5/12

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