TB1254N View Datasheet(PDF) - Toshiba

Part Name

Description

Manufacturer

TB1254N

PAL / NTSC / SECAM 1CHIP (IF+VCD PROCESSOR) IC

Toshiba 



PIN NAME

9 RF AGC

FUNCTION

An output terminal for RF AGC.

A pull up resister is required because of its

open collector output, and also connect de-

coupling capacitor to reduce noises,.

9

10 IF AGC

A terminal to be connected to an IF AGC

filter. Connect 2.2•F of capacitor to Vcc

 

INTERFACE

9V

14

300Ħ

30kĦ

to SELF ADJ

30kĦ

5

1

10

2kĦ

11 APC FILTER

A terminal to be connected with an APC filter

for chroma demodulation.

This terminal voltage controls the frequency

of VCXO.

11

5

42

220Ħ

110kĦ

12 X’TAL

(4.43MHZ)

A terminal to be connected with a

4.433619MHz X’tal oscillator. The oscillated

signal lead to chroma demodulation, H out

frequency tuning, AFT and so on.

3.2V

19

42

12

500ƒ ¶

2.5kƒ ¶

13 CW OUT

An output terminal for the continuous chroma

sub-carrier frequency wave, which amplitude

is 0.7Vp-p (typ).

Also the dc level shows killer status, the level

is 1.5V for B/W and 3.5V for Color.

19

42

1kĦ

13

200Ħ

Ver3.7

19

00/01/28 4

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