Sanyo LA7945N Specifications
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
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 stably extract the caption signal.
• Provides the pulse outputs required by caption decoder
ICs.
Package Dimensions
unit:mm
3059-DIP22S
[LA7945N]
22 12
6.4
7.62
111
0.95 0.48
21.2
1.78
3.25
3.9max
3.3
0.51min
1.7
SANYO : DIP22S
0.25
Specifications
Maximum Ratings at Ta = 25˚C
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erutarepmetgnitarepOrpoT 07+ot01–
erutarepmetegarotSgtsT 051+ot55–
Operating Conditions at Ta = 25˚C
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egatlovylppusrewopdednemmoceRV
egnaregatlovylppusrewopgnitarepOV
xam 7V
CC
Ta≤70˚C
CC
po 5.5ot5.4V
CC
12501TN (KT)/D2593TS B8-0107 No.4616–1/9
˚C
˚C
5V
LA7945N
Electrical and Operating Characteristics at Ta = 25˚C, VCC=5.0V, Input signal : sync-white 1.0V
retemaraPlobmySsnoitidnoC
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egatlovgnipmalctupnIV
leveldlohserhtretlifKCOLHV
tuptuonoitarapesnoitazinorhcnyS
retlifKCOLH
tuptuoataD
tuptuokcolC
tuptuoH12
tuptuoE/O
tuptuoesluplatnoziroH
tuptuoesluplacitreV
levellangistupnIV
emittratsNI-NUR-KLCT
niardtnerruCI
levelhgiHV
levelwoLV
levelhgiHV
levelwoLV
levelhgiHV
levelwoLV
levelhgiHV
levelwoLV
levelhgiHV
levelwoLV
htdiwesluPV
levelhgiHV
levelwoLV
htdiwesluPV
levelhgiHV
levelwoLV
htdiwesluPV
levelhgiHV
levelwoLV
htdiwesluPV
PMLC
HKLC
LKLC
HH12
LH12
WH12
HEO
LEO
WEO
HSH
LSH
WSH
HTSR
LTSR
WTSR
NI
TS
CC
Note : Must not be pulled in to any frequency other than fH.
The pin 11 capacitor should be 100pF ±5%.
The pin 12 resistor should be 15kΩ ±1%.
nimpytxam
LLUPH
EERFH
HTKCOL
HCNYS
LCNYS
HKCOL
LKCOL
HATAD
LATAD
sgnitaR
5.1±zHk
3.517.513.61zHk
3.25.27.2V
3.25.27.2V
0.42.40.5V
08.00.1V
0.42.40.5V
08.00.1V
0.42.40.5V
08.00.1V
0.42.40.5V
08.00.1V
0.42.40.5V
08.00.1V
065607sµ
0.42.40.5V
08.00.1V
4.617.610.71sm
0.42.40.5V
08.00.1V
4.77.70.8sµ
0.42.40.5V
08.00.1V
8.038.138.23sµ
6–03+Bd
6.66.76.8sµ
0.410.810.22Am
tinU
No.4616–2/9
LA7945N
Test Conditions
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fycneuqerfehtyraV
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ycneuqerfgninnur-eerflatnoziroHf
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leveldlohserhtretlifKCOLHV
tuptuonoitarapesnoitazinorhcnyS
retlifKCOLH
tuptuoataD
tuptuokcolC
levelhgiHV
levelwoLV
levelhgiHV
levelwoLV
levelhgiHV
levelwoLV
levelhgiHV
levelwoLV
levelhgiHV
tuptuoH12
levelwoLV
htdiwesluPV
levelhgiHV
tuptuoE/O
levelwoLV
htdiwesluPV
levelhgiHV
tuptuoesluplatnoziroH
levelwoLV
htdiwesluPV
levelhgiHV
tuptuoesluplacitreV
levelwoLV
htdiwesluPV
levellangistupnIV
emittratsNI-NUR-KLCT
niardtnerruCI
LLUPH
EERFH
PMLC
HTKCOL
HCNYS
LCNYS
HKCOL
LKCOL
HATAD
LATAD
HKLC
LKLC
HH12
LH12
WH12
HEO
LEO
WEO
HSH
LSH
WSH
HTSR
LTSR
WTSR
NI
TS
CC
01dna2sniP
01niP
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7niP
1
*2niP
1
*7niP
2,1
*3niP
2,1
*5niP
1
*1niP
1
*6niP
1
*01niP
1
*9niP
,1snipfohcaE
2
*6dna,5,3
,1snipfohcaE
3,2
*6dna,5,3
2
*61niP
.langis
.gnidoced
Note : 1. Connect a 20kΩ resistor between the pin being measured and VCC, and also connect a 20kΩ from that measurement pin to GND.
2. During measurement, this pin carries the closed caption encoded signal.
3. Time TST is shown in the figure below.
H
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.epocsollicsonahtiwdoirep
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.epocsollicsonahtiwdoirep
.epocsollicsonahtiwdoirep
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.yltcerrocgnitarepoerastuptuo6dna,5,3,1nip
erehwtniopehterusaemdnalangistupniehtfo
onsierehtnehwycneuqerfehterusaemotretnuocycneuqerfaesU
CDagniylppaybhgihseog7niphcihwtaegatlovehterusaeM
.epocsollicsonahtiwslevelwoldnahgih2nipehterusaeM
.epocsollicsonahtiwslevelwoldnahgih7nipehterusaeM
.epocsollicsonahtiwslevelwoldnahgih3nipehterusaeM
.epocsollicsonahtiwslevelwoldnahgih5nipehterusaeM
levelhgihehtfohtgnelehtdnaslevelwoldnahgih1nipehterusaeM
levelhgihehtfohtgnelehtdnaslevelwoldnahgih6nipehterusaeM
levelhgihehtfohtgnelehtdnaslevelwoldnahgih01nipehterusaeM
levelhgihehtfohtgnelehtdnaslevelwoldnahgih9nipehterusaeM
,5,3,1nipehttahtmrifnocdna,71nipottupnilevellangisehtyraV
ehttahtmrifnocdna,NI-NUR-KLCdnaCNYSneewtebemitehtyraV
gnirudtnerrucehterusaemdna,61nipotretemtnerrucatcennoC
No.4616–3/9
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