SANYO LA7680, LA7681 Datasheet
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
Sigle-Chip Signal Processor
for Color TV Use
Ordering number:ENN3343A
LA7680, 7681
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Overview
The LA7680 and LA7681 signal processors provide all the
components required to decode PAL or NTSC Color television signals. On-chip circuits include VIF, SIF, a video
processor, a chroma demodulator, and deflection drivers.
The self-adjusting signal processors support vertical field
scanning rates of both 50 and 60Hz, allowing the LA7837
and LA7838 vertical output drivers to maintain a constant
picture height.
The LA7681 replaces the LA7680’s G-Y output at pin 22
with a color contrast signal for input to a SECAM chroma
demodulator. This contrast signal is f ix ed at the maxim um.
The LA7680/7681 is available in 48-pin shrink DIPs.
Features
• Minimized external components.
• 48-pin shrink DIP.
VIF/SIF
• High-gain VIF amplifier.
• Fast-response automatic gain control (AGC).
• No delay between audio input and output.
• Muting for both audio and video signals or for audio
alone.
Video processor
• On-chip two-dimensional differential circuit.
• Variable current transfer.
• 7MHz bandwidth.
Chroma demodulator
• PAL and NTSC system compatible.
• Optimized demodulation angles and ratios.
• High performance burst cleaning filter and ACC/killer
detector.
• On-chip tint circuit (NTSC only).
Deflection drivers
• Adjustment-free vertical or horizontal sync hronization.
• Two-stage automatic frequency control.
• Adjustable separation sensiti vity for v ertical synchronization.
• Fixed picture height for both PAL and NTSC.
• Fixed picture height.
Package Dimensions
unit:mm
3149-DIP48S
[LA7680, 7681]
48
2.53
1
1.78
0.48
46.0
1.05
25
13.8
15.24
24
4.25
5.1max
3.8
0.51min
SANYO : DIP48S
0.25
30801TN (KT)/32593TS/6290TA KI 8-6402, 6403 No.3343–1/10
LA7680, 7681
Specifications
Maximum Ratings at Ta = 25˚C
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egatlovtupnI
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noitapissidrewopelbawollAxamdP 53.1W
tnerructupniPBF
egatlovtupniPBFV
erutarepmetgnitarepOrpoT 56+ot01–
erutarepmetegarotSgtsT 051+ot55–
Recommended Operating Conditions at Ta = 25˚C
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egnaregatlovgnitarepO
egnartnerrucgnitarepOI
V31xam 21V
V11xam 21V
xam 61Am
52
I62xam 5Am
I42xam 01Am
V
V
V31po 01ot8V
V11po 01ot8V
Ta≤65˚C
nim 5–V
62
31
11
52
po 61ot01Am
52
˚C
˚C
9V
9V
31Am
Operating Characteristics at Ta = 25˚C, VCC=V13=V11=9V, ICC=I25=13mA
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tupnimumixaMxamiVtuptuooedivBd1+gnitarenegleveltupniFIV001701µBd
edutilpmatuptuooediVV
niaglaitnereffiDGDDOMoediv%5.78,µBd08=iV0.301%
esahplaitnereffiDPDDOMoediv%5.78,µBd08=iV0.301
oitaresion-ot-langisoediVN/Sgol02,µBd08=iV7435Bd
levelpitlangiscnySV
citsiretcarahcycneuqerFcftuptuooedivBd3–gnitarenegycneuqerF701zHM
noitaludomretniFIVI
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ytivitisnesrotcetedTFAfSseicneuqerffoegnararevo,µBd08=WC530609
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egatlovgnitimilFISmiliVtuptuooedivBd3–gnitarenegleveltupniFIS5425µBd
egatlovtuptuorotcetedMFV
noitrotsidtuptuorotcetedMFDHT,µBd001=iV ∆ zHk03±=f4.00.1%
noitcejerMARMAµBd001=iV3465Bd
niagegatlovreifilpmaFAG
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TTAzH004=f,smrVm002=iV0708Bd
stupnionhtiW2.46.40.5V
stupnionhtiW8.22.47.5V
nim=RV,CGAFR,µBd58=WC6.70.83.8V
xam=RV,CGAFR,µBd58=WC010.03.0V
noitaludom%04
DOM%87=MA,µBd08=iV7.10.23.2p-pV
1.43 (Vp-p)
noise (Vrms)
µBd08=WC0.23.26.2V
V/
zHM34.4
noitrotsid
zHM70.1
,µBd001=iV ∆ zHk03±=f084086088smrVm
FM : ∆f=30kHz
AM : 30%
µBd08=iV,5324Bd
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langispeewstaderusaeM2.15.18.1V
zH004=f,smrVm001=iV810222Bd
sgnitaR
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0.75.70.8V
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htiwtuptuooedivp-pV8.0gnitarenegleveltupniFIV
seicneuqerffoegnararevo,µBd08=WC0.83.87.8V
seicneuqerffoegnararevo,µBd08=WC2.04.09.0V
tuptuoreifilpmaFA%01gnitarenegleveltuptuO
036324µBd
0.28.2smrV
tinU
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zHk/Vm
Continued on next page.
No.3343–2/10
Continued from preceding page.
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LA7680, 7681
∆ tfoS
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∠ pBR
∠ BR
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∆T
1MCCA
2MCCA
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NEC
B/R
N
B/G
N
N
N
Bd6+3–03+Bd
N
N
Bd6+3–03+
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N
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V0ot4,rotsiser
V9ot4,rotsiser
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6–4–2–Bd
70131Bd
710232Bd
54.075.096.0p-pV
022242Bd
57 zHM
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5.81025.12Bd
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7.42.57.5V
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Continued on next page.
No.3343–3/10
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