Sanyo LA7851 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

CRT Display Synchronization

Deflection Circuit

Ordering number:ENN1775A

LA7851

SANYO Electric Co.,Ltd. Semiconductor Company

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

Overview

The LA7851 is a sync deflection circuit IC dedicated to
CRT display use. It can be connected to the LA7832, 7833
(for vertical output use) to form a sync deflection circuit
that meets every requirement for CRT display use.
So far, ICs for color TV use have been applied to the sync
deflection circuit for CR T display use and general-purpose
ICs such as one-shot multivibrator, inverter and a lot of
transistors have been used to form the peripherals such as
sync input interface, horizontal phase shifter . The LA7851
contains these peripherals on chip, has a wide vertical pull­in range of 20Hz, and adopts a stable circuit for horizontal
oscillation from 15kHz to 100kHz aiming at improving the
characteristics requierd for CRT display use.

Features

• The vertical pull-in range 20Hz permits non-adjusting at
vertical sync 50Hz/60Hz.

• The horizontal oscillation frequency can be adjusted sta­bly from 15kHz to 100kHz.

• The horizontal display can be shifted right/left.

• The horizontal/vertical sync input can be used intact re­gardless of the difference in pulse polarity and pulse width.

• The AFC feedback sawtooth wave can be obtained by
simply applying a flyback pulse to the IC as a trigger
pulse.

• Any duty of the horizontal pulse can be set.

• Good linearity because DC bias at vertical output stage is
subject to sampling control within retrace time.

Package Dimensions

unit:mm

3021C-DIP20

[LA7851]

24.0

20

1

1.0

(0.57)

2.54

0.5

1.2

11

7.62

10

(3.25)

3.9max

3.3

0.51min

SANYO : DIP20

6.4

0.25

On-Chip Functions

[Horizontal Block] [Vertical Block]

• AFC • Vertical OSC

• Horizontal OSC • Vertical sawtooth wave generator

• X-ray protector • Sampling type DC voltage control

• Horizontal phase shift

• AFC sawtooth wave generator

• Horizontal pulse duty setting

O2500TN (KT)/N218TA/4015MW/6114KI, TS No.1775–1/4

LA7851

Specifications

Maximum Ratings at Ta = 25˚C

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noitapissidrewopelbawollAxamdP 087Wm

erutarepmetgnitarepOrpoT 58+ot02–

erutarepmetegarotSgtsT 521+ot55–

V01V,

Operating Conditions at Ta = 25˚C

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egatlovylppusdednemmoceRV

egnaregatlovgnitarepO

eulav

egnar

V01V,

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egnareulavkaeptupniesluplacitrevgnitarepOV

kaeptupniesluplatnozirohdednemmoceR

eulavkaeptupniesluplatnozirohgnitarepO

Operating Characteristics at Ta = 25˚C, V11, V22=12V

retemaraPlobmySsnoitidnoC

V

01CC

V

02CC

ycneuqerf

emityaled

niardtnerrucI
niardtnerrucI

egnarni-llupycneuqerflacitreVV
ycneuqerfgninnur-eerflacitreVf

focitsiretcarahcegatlovdecuder/desaercnI

ycneuqerflacitrev

leveldlohserhtlortnoctniopdiM 8.34.4V

egatlovtratsCSOlacitreVf

ycneuqerflacitrevfocitsiretcarahcerutarapmeT 820.0–820.0+

rotcafnoitacifilpmarevirdlacitreVG

niagpoolCDCFAlatnoziroHI

ycneuqerfgninnur-eerflatnoziroHf

egatlovtratsCSOlatnoziroHf

focitsiretcarahcegatlovdecuder/desaercnI

ycneuqerflatnoziroh

tfirdpu-mrawCSOlatnoziroH

latnozirohfocitsiretcarahcerutarepmeT

tnerrucevirdtuptuolatnoziroHI

focitsiretcarahcegatlovdecuder/desaercnI

emityaledretfihsesahp

retfihsesahpfocitsiretcarahcerutarepmeT

focitsiretcarahcegatlovdecuder/desaercnI

emityaledretfihsesahp

retfihsesahpfocitsiretcarahcerutarepmeT

htdiweslup

emitretnecnosirapmocesahpCFA tupni.P.B.FretfazHk437.519.95.11sµ

CFAfocitsiretcarahcegatlovdecuder/desaercnI

emitretnecnosirapmocesahp

esahpCFAfocitsiretcarahcerutarepmeT

emitretnecnosirapmoc

tupnignitarenegmrofevawnosirapmoC

egatlovnoitarepo

tratsnoitareponwod-dlohtaegatlov31nip31V5.08.0V

xam

02

Ta≤65˚C

01V,02

po02

ESLUP
ESLUP

H

ESLUP

H

ESLUP

01
02

NIP

f

V

V

∆f

∆f

V

VV

22

ts,v

Ta=–10 to +60˚C

v

CFA

f

H

H

ts 0.4V

,H

V

,HV

∆f

H

21

V

4

11

Ta=–10 to +60˚C

V

01

Ta=–10 to +60˚C

V

01

Ta=–10 to +60˚C

V

01

41V

0.21V

5.31ot9V

0.5p-pV

0.6ot0.2p-pV

0.5p-pV

0.6ot0.2p-pV

sgnitaR

nimpytxam

2103Am
521Am

zH06cnyslacitreV0.120.32zH

zH55retnec0506zH

V21tazH55,V1±21=1.0–1.0+zH

0.4V

Hz/˚C

2181Bd

58.0±6.1±Am

zHk437.51retnec057–057+zH

V21tazHk437.51,V1±21=05–05+zH

rewopfonoitacilpparetfa.nim03ot.s505–05+zH

9.2–9.2+

0.60.21Am

V1±21=5.0–5.0+V/%

1.0–1.0+

V1±21=0.1–0.1+V/%

31.0–31.0+

V1±21=5.1–5.1+V/%

2.0–2.0+

6.09.0V

Hz/˚C

%/˚C

%/˚C

%/˚CTa=–10 to +60˚C

˚C
˚C

tinU

No.1775–2/4