LA75503V View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LA75503V

For PAL TV/VCR Adjustment Free VIF/SIF Signal Processing IC

SANYO -> Panasonic 

LA75503V

Test circuit 2

Input Impedance Measuring Circuit (VIF, First SIF input impedance)

Impedance analyzer

VIF INPUT 1st SIF INPUT

+

100µF

30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

VCC

15kΩ

LA75503V

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Top View

System Switching

• SIF system switch

The SIF system is switched by setting pins A (pin 13) and B (pin 14) to GND or OPEN.

A

B

B/G

I

D/K

M/N

GND

GND

{

GND

OPEN

{

OPEN

GND

{

OPEN

OPEN

{

FM DET LEVEL

De-emphasis

6dB

75µs

0dB

50µs

0dB

50µs

0dB

50µs

Note: "{" indicates that the system is selected.

• IF system switch

38.9MHz is selected as the IF frequency by leaving pin 15 (crystal oscillation) open. 38MHz is selected by adding

220kΩ between pin 15 and GND. This device can also select 39.5MHz operation by adding a 220kΩ resistor between

pin 15 and VCC.

• Split/inter carrier switch

Inter carrier is selected by setting the first SIF input (pin 20) to GND.

Sound Trap

The trapping point of the sound trap is set approximately 250kHz above the SIF center frequency of each mode to

improve the video S/N. Therefore, design using split specifications is preferable.

No.6804-6/15

Share Link: