AN5637 View Datasheet(PDF) - Panasonic Corporation

Part Name

Description

Manufacturer

AN5637

SECAM decoder IC

Panasonic Corporation 

ICs for TV

s Application Circuit Example

AN5637

Note) The following signal is inputted to Pin1 from the AN5192/95.

• System discrimination

1. Pin1 is the input and output pin for the three pieces of information

(1) Reference frequency signal input pin (AC)

(2) System discrimination signal input pin (DC voltage)

(3) SECAM/Non-SECAM discrimination output pin (DC current)

AN5637

System discrimination

SECAM

Non-SECAM

Pin1 input

DC voltage

"H" (4.6 V)

"L" (1.3 V)

"H" (4.6 V)

"L" (1.5 V)

Pin1 sink current

175 µA

175 µA

0 µA

0 µA

Pin9, 10 output

Color difference signal output

Open

DC voltage output

Open

2. Reference frequency signal

The reference frequency signal input for Pin1 is used for the following 4 signals ;

(1) Bell filter automatic adjustement

(2) PLL(VCO) automatic adjustement

(3) Deemphasis automatic adjustement

(4) Ident discrimination

Be sure to input the high precision PAL carrier signal (4.43362 MHz) only in the vertical retrace period.

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