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.
Monolithic Linear IC
Closed Caption Signal (US specifications)
Extraction IC
Ordering number:ENN4616
LA7945N
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
21.2
0.95
0.48
1.7
1.78
3.9max
0.51min
6.4
7.62
3.3
3.25
0.25
111
22
12
Package Dimensions
unit:mm
3059-DIP22S
[LA7945N]
SANYO : DIP22S
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.
Functions
Synchronization separation.
VCO
Vertical countdown.
Horizontal countdown.
Data slicing.
Dual loop AFC.
Field discrimination.
Lock detection
Vertical/horizontal pulse output.
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 = 25C
Ta≤70C
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Operating Conditions at Ta = 25C
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