LA7945 查看數據表（PDF） - SANYO -> Panasonic

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LA7945

Closed Caption Signal (US specifications) Extraction IC

SANYO -> Panasonic 

Ordering number:ENN4616

Monolithic Linear IC

LA7945N

Closed Caption Signal (US specifications)

Extraction IC

Overview

The LA7945N extracts the closed caption signal overlapped

in the video signal vertical retrace period and transfers the

data and clock signal to a decoder IC. This IC requires the

use of either an add-on type decoder, such as the LC7458B

or 7457A (for I2C), or a microcontroller type decoder, such

as the LC8640XX.

Package Dimensions

unit:mm

3059-DIP22S

[LA7945N]

22

12

Functions

• Synchronization separation.

• VCO

• Vertical countdown.

• Horizontal countdown.

• Data slicing.

• Dual loop AFC.

• Field discrimination.

• Lock detection

• Vertical/horizontal pulse output.

1

11

21.2

0.95

0.48

1.78

1.7

SANYO : DIP22S

Features

• Adoption of a dual loop AFC allows the LA7945N to sta-

bly extract the caption signal.

• Provides the pulse outputs required by caption decoder

ICs.

Specifications

Maximum Ratings at Ta = 25˚C

Parameter

Maximum power supply voltage

Allowable power dissipation

Operating temperature

Storage temperature

Symbol

VCC max

Pd max

Topr

Tstg

Ta≤70˚C

Operating Conditions at Ta = 25˚C

Parameter

Recommended power supply voltage

Operating power supply voltage range

Symbol

VCC

VCC op

Conditions

Conditions

Ratings

Unit

7V

250 mW

–10 to +70 ˚C

–55 to +150 ˚C

Ratings

Unit

5V

4.5 to 5.5 V

Any and all SANYO products described or contained herein do not have specifications that can handle

applications that require extremely high levels of reliability, such as life-support systems, aircraft’s

control systems, or other applications whose failure can be reasonably expected to result in serious

physical and/or material damage. Consult with your SANYO representative nearest you before using

any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other

parameters) listed in products specifications of any and all SANYO products described or contained

herein.

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

12501TN (KT)/D2593TS B8-0107 No.4616–1/9

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