www.ti.com
SN74LVC244A
OCTALBUFFER/DRIVERWITH3-STATEOUTPUTS
SCAS414X–NOVEMBER1992–REVISEDMARCH2005
FEATURES
•••••••
OperatesFrom1.65Vto3.6VInputsAcceptVoltagesto5.5V
SpecifiedFrom–40°Cto85°Cand–40°Cto125°C
Maxtpdof5.9nsat3.3V
TypicalVOLP(OutputGroundBounce)<0.8VatVCC=3.3V,TA=25°C
TypicalVOHV(OutputVOHUndershoot)>2VatVCC=3.3V,TA=25°C
SupportsMixed-ModeSignalOperationonAllPorts(5-VInput/OutputVoltageWith3.3-VVCC)
IoffSupportsPartial-Power-DownModeOperation
Latch-UpPerformanceExceeds250mAPerJESD17
ESDProtectionExceedsJESD22
–2000-VHuman-BodyModel(A114-A)–200-VMachineModel(A115-A)
–1000-VCharged-DeviceModel(C101)
DB, DGV, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
1OE1A12Y41A22Y31A32Y21A42Y1GND
12345678910
20191817161514131211
VCC2OE1Y12A41Y22A31Y32A21Y42A1
•••
RGY PACKAGE(TOP VIEW)
1OE1
VCC20
192OE181Y1172A4161Y2152A3141Y3132A2121Y411
DESCRIPTION/ORDERINGINFORMATION
Thisoctalbuffer/linedriverisoperationalat1.5-Vto3.6-VVCC,butisdesignedspecificallyfor1.65-Vto3.6-VVCCoperation.
1A12Y41A22Y31A32Y21A42Y1
23456789
10
GNDORDERINGINFORMATION
TA
QFN–RGY
–40°Cto85°C
VFBGA–GQN
VFBGA–ZQN(Pb-Free)PDIP–NSOIC–DWSOP–NS
–40°Cto125°C
SSOP–DBTSSOP–PWTVSOP–DGV
PACKAGE(1)
Reelof1000Reelof1000Tubeof20Tubeof25Reelof2000Reelof2000Reelof2000Tubeof70Reelof2000Reelof250Reelof2000
ORDERABLEPARTNUMBERSN74LVC244ARGYRSN74LVC244AGQNRSN74LVC244AZQNRSN74LVC244ANSN74LVC244ADWSN74LVC244ADWRSN74LVC244ANSRSN74LVC244ADBRSN74LVC244APWSN74LVC244APWRSN74LVC244APWTSN74LVC244ADGVR
LC244ALC244A
TOP-SIDEMARKINGLC244ALC244ASN74LVC244ANLVC244ALVC244ALC244A
(1)
Packagedrawings,standardpackingquantities,thermaldata,symbolization,andPCBdesignguidelinesareavailableatwww.ti.com/sc/package.
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.
Copyright©1992–2005,TexasInstrumentsIncorporated
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SN74LVC244A
OCTALBUFFER/DRIVERWITH3-STATEOUTPUTS
SCAS414X–NOVEMBER1992–REVISEDMARCH2005
www.ti.com
DESCRIPTION/ORDERINGINFORMATION(CONTINUED)
TheSN74LVC244Aisorganizedastwo4-bitlinedriverswithseparateoutput-enable(OE)inputs.WhenOEislow,thedevicepassesdatafromtheAinputstotheYoutputs.WhenOEishigh,theoutputsareinthehigh-impedancestate.
Inputscanbedrivenfromeither3.3-Vor5-Vdevices.Thisfeatureallowstheuseofthisdeviceasatranslatorinamixed3.3-V/5-Vsystemenvironment.
Toensurethehigh-impedancestateduringpoweruporpowerdown,OEshouldbetiedtoVCCthroughapullupresistor;theminimumvalueoftheresistorisdeterminedbythecurrent-sinkingcapabilityofthedriver.
Thisdeviceisfullyspecifiedforpartial-power-downapplicationsusingIoff.TheIoffcircuitrydisablestheoutputs,preventingdamagingcurrentbackflowthroughthedevicewhenitispowereddown.
GQN OR ZQN PACKAGE
(TOP VIEW)
1
ABCDE
2
3
4
TERMINALASSIGNMENTS
1
ABCDE
1A11A21A31A4GND
21OE2A42Y32A22Y1
3VCC2Y42A32Y22A1
42OE1Y11Y21Y31Y4
FUNCTIONTABLE(EACHBUFFER)
INPUTSOELLH
AHLX
OUTPUT
Y
HLZ
2
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SN74LVC244A
OCTALBUFFER/DRIVERWITH3-STATEOUTPUTS
SCAS414X–NOVEMBER1992–REVISEDMARCH2005
LOGICDIAGRAM(POSITIVELOGIC)
1OE12OE191A1
2181Y12A1
1192Y1
1A2
4161Y22A2
1372Y2
1A3
6141Y32A3
1552Y3
1A4
8121Y42A4
1732Y4
Pin numbers shown are for the DB, DGV, DW, N, NS, PW, and RGY packages.
AbsoluteMaximumRatings(1)
overoperatingfree-airtemperaturerange(unlessotherwisenoted)
MIN
VCCVIVOVOIIKIOKIO
SupplyvoltagerangeInputvoltagerange(2)
Voltagerangeappliedtoanyoutputinthehigh-impedanceorpower-offstate(2)Voltagerangeappliedtoanyoutputinthehighorlowstate(2)(3)InputclampcurrentOutputclampcurrentContinuousoutputcurrent
ContinuouscurrentthroughVCCorGND
DBpackage(4)DGVpackage(4)DWpackage(4)
θJA
Packagethermalimpedance
GQN/ZQNpackage(4)Npackage(4)NSpackage(4)PWpackage(4)RGYpackage(5)
TstgPtot(1)(2)(3)(4)(5)(6)(7)
StoragetemperaturerangePowerdissipation
TA=–40°Cto125°C(6)(7)
–65
VI<0VO<0
–0.5–0.5–0.5–0.5
MAX6.56.56.5VCC+0.5
–50–50±50±1007092587869608337150500
°CmW°C/WUNITVVVVmAmAmAmA
Stressesbeyondthoselistedunder\"absolutemaximumratings\"maycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder\"recommendedoperatingconditions\"isnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.Theinputandoutputnegative-voltageratingsmaybeexceedediftheinputandoutputcurrentratingsareobserved.ThevalueofVCCisprovidedintherecommendedoperatingconditionstable.ThepackagethermalimpedanceiscalculatedinaccordancewithJESD51-7.ThepackagethermalimpedanceiscalculatedinaccordancewithJESD51-5.FortheDWpackage:above70°CthevalueofPtotderateslinearlywith8mW/K.
FortheDB,DGV,N,NS,andPWpackages:above60°CthevalueofPtotderateslinearlywith5.5mW/K.
3
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SN74LVC244A
OCTALBUFFER/DRIVERWITH3-STATEOUTPUTS
SCAS414X–NOVEMBER1992–REVISEDMARCH2005
www.ti.com
RecommendedOperatingConditions(1)
TA=25°CMIN
VCCSupplyvoltage
High-levelinputvoltage
Operating
DataretentiononlyVCC=1.65Vto1.95VVCC=2.3Vto2.7VVCC=2.7Vto3.6V
VILVIVO
Low-levelinputvoltageInputvoltageOutputvoltage
VCC=1.65V
IOH
High-leveloutputcurrent
VCC=2.3VVCC=2.7VVCC=3VVCC=1.65V
IOL
Low-leveloutputcurrent
VCC=2.3VVCC=2.7VVCC=3V
(1)
VCC=1.65Vto1.95VVCC=2.3Vto2.7VVCC=2.7Vto3.6V
001.651.5
0.65×VCC
1.72
0.35×VCC
0.70.85.5VCC–4–8–12–24481224
00
MAX3.6
–40TO85°CMIN1.651.5
0.65×VCC
1.72
0.35×VCC
0.70.85.5VCC–4–8–12–24481224
00
MAX3.6
–40TO125°CMIN1.651.5
0.65×VCC
1.72
0.35×VCC
0.70.85.5VCC–4–8–12–24481224
mAmAVVVV
MAX3.6
UNITV
VIH
AllunusedinputsofthedevicemustbeheldatVCCorGNDtoensureproperdeviceoperation.RefertotheTIapplicationreport,ImplicationsofSloworFloatingCMOSInputs,literaturenumberSCBA004.
4
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SN74LVC244A
OCTALBUFFER/DRIVERWITH3-STATEOUTPUTS
SCAS414X–NOVEMBER1992–REVISEDMARCH2005
ElectricalCharacteristics
overrecommendedoperatingfree-airtemperaturerange(unlessotherwisenoted)
PARAMETER
TESTCONDITIONSIOH=–100µAIOH=–4mA
VOH
IOH=–8mAIOH=–12mAIOH=–24mAIOL=100µAIOL=4mA
VOL
IOL=8mAIOL=12mAIOL=24mA
IIIoffIOZICC∆ICCCiCo
(1)
VI=5.5VorGNDVIorVO=5.5VVO=0to5.5VVI=VCCorGND3.6V≤VI≤5.5V(1)
IO=0
VCC
1.65Vto3.6V
1.65V2.3V2.7V3V3V1.65Vto3.6V
1.65V2.3V2.7V3V3.6V03.6V3.6V2.7Vto3.6V
3.3V3.3V
45.5
TA=25°CMINVCC–0.21.291.92.22.42.3
0.10.240.30.40.55±1±1±111500
TYPMAX
–40TO85°CMINVCC–0.21.21.72.22.42.2
0.20.450.70.40.55±5±10±101010500MAX
–40TO125°CMINVCC–0.31.051.552.052.252
0.30.60.750.60.8±20±20±2040405000
µAµAµAµAµApFpFVV
MAX
UNIT
OneinputatVCC–0.6V,OtherinputsatVCCorGNDVI=VCCorGNDVO=VCCorGND
Thisappliesinthedisabledstateonly.
SwitchingCharacteristics
overrecommendedoperatingfree-airtemperaturerange(unlessotherwisenoted)(seeFigure1)
PARAMETER
FROM(INPUT)
TO(OUTPUT)
VCC1.5V1.8V±0.15V
tpd
A
Y
2.5V±0.2V
2.7V3.3V±0.3V
1.5V1.8V±0.15V
ten
OEY
2.5V±0.2V
2.7V3.3V±0.3V
1.5V1.8V±0.15V
tdis
OEY
2.5V±0.2V
2.7V3.3V±0.3V
tsk(o)
3.3V±0.3V
TA=25°CMIN11111.511111.511111.5
TYP75.94.24.23.98.36.44.654.57.25.83.73.83.8
MAX14.410.47.46.75.717.812.19.18.47.415.611.67.36.66.3
–40TO85°CMIN11111.511111.511111.5
MAX14.910.97.96.95.918.312.69.68.67.616.112.17.86.86.51
–40TO125°CMIN11111.511111.511111.5
MAX16.412.4108.27.219.814.111.710.39.417.613.69.98.681.5
nsnsnsnsUNIT
5
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SN74LVC244A
OCTALBUFFER/DRIVERWITH3-STATEOUTPUTS
SCAS414X–NOVEMBER1992–REVISEDMARCH2005
www.ti.com
OperatingCharacteristics
TA=25°C
PARAMETER
Outputsenabled
Cpd
Powerdissipationcapacitanceperbuffer/driver
Outputsdisabled
f=10MHzTESTCONDITIONS
f=10MHz
VCC1.8V2.5V3.3V1.8V2.5V3.3V
TYP434344112
pFUNIT
6
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SN74LVC244A
OCTALBUFFER/DRIVERWITH3-STATEOUTPUTS
SCAS414X–NOVEMBER1992–REVISEDMARCH2005
PARAMETERMEASUREMENTINFORMATION
RLS1VLOADOpenGNDRLTESTtPLH/tPHLtPLZ/tPZLtPHZ/tPZH
S1OpenVLOADGND
From OutputUnder Test
CL(see Note A)LOAD CIRCUIT
VCC1.5 V1.8 V ±0.15 V2.5 V ±0.2 V
2.7 V3.3 V ±0.3 V
INPUTSVIVCCVCCVCC2.7 V2.7 V
tr/tf≤2 ns≤2 ns≤2 ns≤2.5 ns≤2.5 ns
VMVCC/2VCC/2VCC/21.5 V1.5 V
VLOAD2 × VCC2 × VCC2 × VCC6 V6 V
CL15 pF30 pF30 pF50 pF50 pF
RL2 kΩ1 kΩ500 Ω500 Ω500 Ω
V∆0.1 V0.15 V0.15 V0.3 V0.3 V
VI
Timing Input
twVI
Input
VMVOLTAGE WAVEFORMSPULSE DURATION
VI
Input
tPLHOutput
tPHLVMVMVMVM0 VtPHLVOH
VMVOL
tPLHVOH
Output
VMVOL
VOLTAGE WAVEFORMSPROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
OutputWaveform 2S1 at GND(see Note B)
OutputControlOutputWaveform 1S1 at VLOAD(see Note B)
tPZLVMtPZHVMVM0 V
Data Input
tsuVMVOLTAGE WAVEFORMSSETUP AND HOLD TIMES
VI
VMVM0 V
tPLZVLOAD/2
VOL + V∆tPHZVOH − V∆VOH≈0 V
VOLTAGE WAVEFORMSENABLE AND DISABLE TIMESLOW- AND HIGH-LEVEL ENABLING
VOL
thVI
VM0 V
VM0 V
NOTES:A.CL includes probe and jig capacitance.
B.Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform2 is for an output with internal conditions such that the output is high, except when disabled by the output control.C.All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω.D.The outputs are measured one at a time, with one transition per measurement.E.tPLZ and tPHZ are the same as tdis.F.tPZL and tPZH are the same as ten.G.tPLH and tPHL are the same as tpd.
H.All parameters and waveforms are not applicable to all devices.
Figure1.LoadCircuitandVoltageWaveforms
7
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PACKAGEOPTIONADDENDUM
www.ti.com
6-Dec-2006
PACKAGINGINFORMATION
OrderableDeviceSN74LVC244ADBLESN74LVC244ADBRSN74LVC244ADBRE4SN74LVC244ADBRG4SN74LVC244ADGVRSN74LVC244ADGVRE4SN74LVC244ADWSN74LVC244ADWE4SN74LVC244ADWRSN74LVC244ADWRE4SN74LVC244AGQNR
Status(1)OBSOLETEACTIVEACTIVEACTIVEACTIVEACTIVEACTIVEACTIVEACTIVEACTIVEACTIVE
PackageTypeSSOPSSOPSSOPSSOPTVSOPTVSOPSOICSOICSOICSOICBGAMI CROSTARJUNI ORPDIPPDIPSOSOTSSOPTSSOPTSSOPTSSOPTSSOPTSSOPTSSOPTSSOPTSSOPQFN
PackageDrawingDBDBDBDBDGVDGVDWDWDWDWGQN
PinsPackageEcoPlan(2)
Qty2020202020202020202020
TBD
2000Green(RoHS&
noSb/Br)2000Green(RoHS&
noSb/Br)2000Green(RoHS&
noSb/Br)2000Green(RoHS&
noSb/Br)2000Green(RoHS&
noSb/Br)2525
Green(RoHS&noSb/Br)Green(RoHS&noSb/Br)
Lead/BallFinish
CallTICUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUSNPB
MSLPeakTemp(3)CallTI
Level-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-240C-UNLIM
2000Green(RoHS&
noSb/Br)2000Green(RoHS&
noSb/Br)1000
TBD
SN74LVC244ANSN74LVC244ANE4SN74LVC244ANSRSN74LVC244ANSRE4SN74LVC244APWSN74LVC244APWE4SN74LVC244APWG4SN74LVC244APWLESN74LVC244APWRSN74LVC244APWRE4SN74LVC244APWRG4SN74LVC244APWTSN74LVC244APWTE4SN74LVC244ARGYR
ACTIVEACTIVEACTIVEACTIVEACTIVEACTIVEACTIVEOBSOLETEACTIVEACTIVEACTIVEACTIVEACTIVEACTIVE
NNNSNSPWPWPWPWPWPWPWPWPWRGY
2020202020202020202020202020
2020
Pb-Free(RoHS)Pb-Free(RoHS)
CUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCallTICUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAUCUNIPDAU
N/AforPkgTypeN/AforPkgTypeLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMCallTI
Level-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-1-260C-UNLIMLevel-2-260C-1YEAR
2000Green(RoHS&
noSb/Br)2000Green(RoHS&
noSb/Br)707070
Green(RoHS&noSb/Br)Green(RoHS&noSb/Br)Green(RoHS&noSb/Br)
TBD
2000Green(RoHS&
noSb/Br)2000Green(RoHS&
noSb/Br)2000Green(RoHS&
noSb/Br)250250
Green(RoHS&noSb/Br)Green(RoHS&noSb/Br)
1000Green(RoHS&
noSb/Br)
Addendum-Page1
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PACKAGEOPTIONADDENDUM
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6-Dec-2006
OrderableDeviceSN74LVC244ARGYRG4SN74LVC244AZQNR
Status(1)ACTIVEACTIVE
PackageTypeQFNBGAMI CROSTARJUNI OR
PackageDrawingRGYZQN
PinsPackageEcoPlan(2)
Qty2020
1000Green(RoHS&
noSb/Br)1000Green(RoHS&
noSb/Br)
Lead/BallFinishCUNIPDAUSNAGCU
MSLPeakTemp(3)Level-2-260C-1YEARLevel-1-260C-UNLIM
(1)
Themarketingstatusvaluesaredefinedasfollows:ACTIVE:Productdevicerecommendedfornewdesigns.
LIFEBUY:TIhasannouncedthatthedevicewillbediscontinued,andalifetime-buyperiodisineffect.
NRND:Notrecommendedfornewdesigns.Deviceisinproductiontosupportexistingcustomers,butTIdoesnotrecommendusingthispartinanewdesign.
PREVIEW:Devicehasbeenannouncedbutisnotinproduction.Samplesmayormaynotbeavailable.OBSOLETE:TIhasdiscontinuedtheproductionofthedevice.
(2)
EcoPlan-Theplannedeco-friendlyclassification:Pb-Free(RoHS),Pb-Free(RoHSExempt),orGreen(RoHS&noSb/Br)-pleasecheckhttp://www.ti.com/productcontentforthelatestavailabilityinformationandadditionalproductcontentdetails.TBD:ThePb-Free/Greenconversionplanhasnotbeendefined.
Pb-Free(RoHS):TI'sterms\"Lead-Free\"or\"Pb-Free\"meansemiconductorproductsthatarecompatiblewiththecurrentRoHSrequirementsforall6substances,includingtherequirementthatleadnotexceed0.1%byweightinhomogeneousmaterials.Wheredesignedtobesolderedathightemperatures,TIPb-Freeproductsaresuitableforuseinspecifiedlead-freeprocesses.
Pb-Free(RoHSExempt):ThiscomponenthasaRoHSexemptionforeither1)lead-basedflip-chipsolderbumpsusedbetweenthedieandpackage,or2)lead-baseddieadhesiveusedbetweenthedieandleadframe.ThecomponentisotherwiseconsideredPb-Free(RoHScompatible)asdefinedabove.
Green(RoHS&noSb/Br):TIdefines\"Green\"tomeanPb-Free(RoHScompatible),andfreeofBromine(Br)andAntimony(Sb)basedflameretardants(BrorSbdonotexceed0.1%byweightinhomogeneousmaterial)
(3)
MSL,PeakTemp.--TheMoistureSensitivityLevelratingaccordingtotheJEDECindustrystandardclassifications,andpeaksoldertemperature.
ImportantInformationandDisclaimer:TheinformationprovidedonthispagerepresentsTI'sknowledgeandbeliefasofthedatethatitisprovided.TIbasesitsknowledgeandbeliefoninformationprovidedbythirdparties,andmakesnorepresentationorwarrantyastotheaccuracyofsuchinformation.Effortsareunderwaytobetterintegrateinformationfromthirdparties.TIhastakenandcontinuestotakereasonablestepstoproviderepresentativeandaccurateinformationbutmaynothaveconducteddestructivetestingorchemicalanalysisonincomingmaterialsandchemicals.TIandTIsuppliersconsidercertaininformationtobeproprietary,andthusCASnumbersandotherlimitedinformationmaynotbeavailableforrelease.
InnoeventshallTI'sliabilityarisingoutofsuchinformationexceedthetotalpurchasepriceoftheTIpart(s)atissueinthisdocumentsoldbyTItoCustomeronanannualbasis.
Addendum-Page2
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MECHANICAL DATAMPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000DGV (R-PDSO-G**) 24 PINS SHOWN0,230,1313PLASTIC SMALL-OUTLINE 0,40240,07M0,16 NOM4,504,306,606,20Gage Plane0,250°–ā8°1A120,750,50Seating Plane1,20 MAX0,150,050,08PINS **DIMA MAXA MIN143,703,50163,703,50205,104,90245,104,90387,907,70489,809,605611,4011,204073251/E 08/00NOTES:A.B.C.D.All linear dimensions are in millimeters.This drawing is subject to change without notice.Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side.Falls within JEDEC:24/48 Pins – MO-15314/16/20/56 Pins – MO-194POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com
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MECHANICAL DATAMSSO002E – JANUARY 1995 – REVISED DECEMBER 2001DB (R-PDSO-G**) 28 PINS SHOWN0,65280,380,22150,15MPLASTIC SMALL-OUTLINE0,250,095,605,008,207,40Gage Plane1A140°–ā8°0,250,950,55Seating Plane2,00 MAX0,05 MIN0,10PINS **DIMA MAX146,50166,50207,50248,502810,503010,503812,90A MIN5,905,906,907,909,909,9012,304040065/E 12/01NOTES:A.B.C.D.All linear dimensions are in millimeters.This drawing is subject to change without notice.Body dimensions do not include mold flash or protrusion not to exceed 0,15.Falls within JEDEC MO-150POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com
MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999 MECHANICAL DATA PW (R-PDSO-G**) 14 PINS SHOWNPLASTIC SMALL-OUTLINE PACKAGE0,651480,300,190,10M0,15 NOM4,504,306,606,20Gage Plane0,251A70°–8°0,750,50Seating Plane1,20 MAX0,150,050,10PINS **DIMA MAX83,10145,10165,10206,60247,90289,80A MIN2,904,904,906,407,709,604040064/F 01/97NOTES:A.B.C.D.All linear dimensions are in millimeters.This drawing is subject to change without notice.Body dimensions do not include mold flash or protrusion not to exceed 0,15.Falls within JEDEC MO-153POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com
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