HOLT HI-8150PQT, HI-8150PQI, HI-8151PQT, HI-8051PQT, HI-8050PQT Datasheet

HI-8050/51,HI-8150/51

January2001

CMOSHIGHVOLTAGEDISPLAYDRIVER

GENERALDESCRIPTION

TheHI-8050,HI-8051,HI-8150andHI-8151areCMOS
integratedcircuitsdesignedforhighvoltageLCDdisplay
driveapplications.TheHI-8050&HI-8051haveTTLlogic
inputswhereastheHI-8150&HI-8151haveCMOSlogic
inputs.Theydriveupto38segmentsatvoltagesbetween
+5and-30volts.Theoptionalnegativeconverteronthe
HI-8050&HI-8150canbeusedtogeneratethenegative
displaydrivevoltage.Allproductshavetestinputsto
facilitateopensandshortstestingaswellasautomatic
blankingofthedisplayifthe+5Vpowerislost.

TheHI-8050andHI-8150aredesignedtoreplacet he
HI-8010andHI-8020devicesinall5voltapplications.They
offersignificantlyenhancedESDprotectionalongwitha
considerablyfasterserialinputdatarate.

Thedataisseriallyclockedintothedeviceonthenegative
edgeoftheclockandlatchedinparalleltothesegment
outputsonthehightolowtransitionoftheloadinput.Serial
outputdatachangesonthepositiveedgeoftheclock
allowingthecascadingofmultipledriversforlargerdisplays.

Thedevicelayoutsupportsallpreviouspinoutsofthe
HI-8010/HI-8020products.Inaddition,newtechnologyand
featuresaffordne wpackagingoptions.ConsultyourHolt
SalesRepresentativetoexplorethepossibilities.

APPLICATIONS

!

DichroicLiquidCrystalDisplays

!

StandardLiquidCrystalDisplays

! 5VoltSerialDatatoParallelHighVoltage

PADCONFIGURATION (TopView)

BPIN

BPOSC

VDD

N/C
CONVOSC
CONVOUT

VEE

S37

S38

S1
S2
S3
S4
S5
S6
S7

(Seepage3-32AforHI-8051&HI-8151pinconfigurations)

2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

HI-8050PQI
HI-8150PQI

HI-8050PQT

&

HI-8150PQT

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34

S27
S26
S25
S24
S23
S22
S21
S20
DOUT38
DOUT32
DOUT30
T2
T1
N/C
BPOUT
N/C

FEATURES

!

4MHzserialinputdatarate

!

38segmentoutputs

!

Cascadable

!

5Voltinputstranslatedto35Volts

!

Testpinsallowhardwareall"ON",all"OFF"or

alternating

!

Monitors5voltsupplyandforcesall
segmentsto"OFF"conditioniflost

!

Negativevoltageconverteravailableon-chip

!

CMOSlowpower

!

Militaryprocessingavailable

HOLTINTEGRATEDCIRCUITS

FUNCTIONALBLOCKDIAGRAM

DIN

Þ
Þ

CL

Þ

CS

8020OPT Þ

LD

BPIN

BPOSC

Þ

Þ
Þ

CONTROL

LOGIC

Oscillator

Divider

Voltage

Translator

HighVoltage

Buffer

Þ BPOUT

1(DS8050Rev.C)01/01

DATAIN

38Stage

ShiftRegister

CLK

LE

38BitLatch

Voltage

Translators

HighVoltage

Drivers

38SEGMENTS

DOUT38
DOUT32
DOUT30

HI-8050/51,HI-8150/51

PINDESCRIPTIONTABLE

SIGNALFUNCTIONDESCRIPTION

VSSPOWER0Volts

8020OPTCLCS

CS
CL
LDLOGICINPUTLatchesdatainshiftregistertothesegmentoutputs-Activehigh

DINLOGICINPUTSerialinputdatatotheshiftregister

BPININPUTBackplanefrequencyinput.Eitherdrivenfromanexternalsourceorconnected

BPOSCOUTPUTInternaloscillatorpin.ConnectedtoBPINandanexternalresisto randcapacitor

VDDPOWER+5V±5%,Positivevoltageofthebackplaneandsegments

CONVOSCINPUTUsedinconjunctionwithCONVOUTtogeneratethenegativeVEEvoltage

CONVOUTOUTPUTUsedinconjunctionwithCONVOSCtogeneratethenegativeVEEvoltage

VEEPOWERNegativevoltageofthebackplaneandsegments-betweenVSSandVDD-35V

LOGICINPUTOpenorhighlogiclevelselectstheHI-8010/HI-8110/logic.Alow

selectstheHI-8020/HI-8120Logic(HI-8050&HI-8150only)
LOGICINPUTChipselect-Activelow
LOGICINPUTSerialdatainputclock-Activelow

toBPOSCandanexternalresistorandcapacitor.

on-chip(HI-8050&HI-8150only).

on-chip(HI-8050&HI-8150only).

S1toS38OUTPUTSegmentoutputstoLCDdisplay

BPOUTOUTPUTBackplaneoutputtoLCDdisplay(SeeFigure3forcascadingdrivers)

T1LOGICINPUTUsedinconjunctionwithT2tocontroldisplaymod e.Normalmodeislogiclow.
T2LOGICINPUTUsedinconjunctionwithT1tocontroldisplaymode.Normalmodeislogiclow.

DOUT30OUTPUTLogicoutputfromthe30thbitoftheshiftregister.Useforpattern

verificationorastheDINofthenextcascadeddriver(HI-8050&HI-8150only).

DOUT32OUTPUT

DOUT38OUTPUT

Logicoutputfromthe32ndbitoftheshiftregister.Useforpattern

verificationorastheDINofthenextcascadeddriver(HI-8050&HI-8150only).

Logicoutputfromthe38thbitoftheshiftregister.Useforpattern

verificationorastheDINofthenextcascadeddriver.

HOLTINTEGRATEDCIRCUITS

2

FUNCTIONALDESCRIPTION

HI-8050/51,HI-8150/51

INPUTLOGIC

ThedataisclockedintoaserialshiftregisterfromtheDINin­putonthenegativeedgeofwhileisheldlow.LDis

CL CS
normallyheldlowandpulsedhighonlywhendatafromthe
shiftregisterisparallellatchedtothesegmentoutputs.

CS
mustbelowwhenLDispulsed.Thelatchesaretransparent
whileLDishigh.Alogic"1"intheshiftregistercausesthe
correspondingsegmentoutputtobeoutofphasewiththe
BPoutput.AllfourlogicinputsareTTLcompatibleonthe
HI-8050/51andCMOScompatibleontheHI-8150/51.

BPOSCandBPIN

Theuserhastheoptionofcreatingthebackplanefrequency
internallyorprovidingas ignalfromanexternalsource.For
aninternaloscillator,BPINandBPOSCareconnectedto­getherandtheappropriateR&Ccombinationisappliedas
showninFigure1.Theresultingbackplanefrequencyisap­proximately:

f=1.(R=220K,C=220pF,f100HZ)

BPBP

256RC

Thevalueoftheresistormustbegreaterthan30K.

»Ω

Ω

Alternatively,BPOSCisleftopenandanexternalbackplane
signalofthedesiredfrequencyisappliedtotheBPINinput.

VEE&NEGATIVEVOLTAGECONVERTER

VEEcanbeconnectedtoanegativepowersupply.Alterna­tively,theHI-8050&HI-8150havetheoptionofgenerating
theVEEvoltagewithabuilt-in-25voltnegativevoltagecon­verter(SeeFigure2).Whennotused,theopenCONVOSC
pinisdetectedandallpowerconsumingcircuitryisdis­abled.Theconverterwillsurviveashortbetweentwoseg­mentsandstillmaintainaVEEvoltageof-20V.

DOUT

TheDOUT30,DOUT32,andDOUT38pinsareavailablefor
cascadingdevicestodrivemoresegments(SeeFigure3)and
forverifyingtheintegrityoftheshiftregisterdata.Theoutputs
candrive2TTLloads.Theychangeonthepositiveedgeof

.CL

AUTOMATICSEGMENTSOFF

Athresholddevicedetectswhenthe5Vsupplyisbelowap­proximately1Vandforcesallthesegmentsandthebackplane
tothesamelevel.ThisfeatureisusedtodischargetheVEE
capacitorwhenthe5Vpowerisswitchedoff,toprolongthelife
oftheLCDdisplay.

8020OPT

TheandinputsfunctionthesameastheHI-8010and

CLCS
HI-8110product(SeeFigure5)ifthispinisleftopenorheld
high.Ifheldlow,thetwopinsfunctionthesameastheHI-8020
andHI-8120product(SeeFigure6).Thisinputisavailable
onlyontheHI-8050(TTL)andHI-8150(CMOS)products.

TESTINPUTS

Thetestfunctionsavailableare:

T2T1DisplayodeM

00Normal
01All Off
10AllOn
11AlternatingOn/OffSegments

Thetestinputsmustbetiedtotheappropriatelogiclevelfor
correctcircuitoperation.BothtestinputsareTTLcompatible
ontheHI-8050/51andCMOScompatibleontheHI-8150/51.

V DD

R

BPIN

BPOSC

C

V SS

TOBACKPLANE

TRANSLATOR

ANDDRIVER

Figure1.INTERNALOSCILLATORCIRCUIT

V DD

68K Ω

C

÷256

R

Q

CONVOSC

IN5818,IN5819

CONVOUT

330µH

V SS

VEE

10µF

V SS

Figure2.OPTIONALVOLTAGECONVERTER

HOLTINTEGRATEDCIRCUITS

3

R

OSC

SENSE

Control

V DD