tristateddiscuzx2.5

CY62256VN256K(32Kx8)StaticRAMCypressSemiconductorCorporation198ChampionCourtSanJose,CA95134-1709408-943-2600Document#:001-06512Rev.
*BRevisedSeptember25,2009FeaturesTemperatureRangesCommercial:0°Cto70°CIndustrial:–40°Cto85°CAutomotive-A:–40°Cto85°CAutomotive-E:–40°Cto125°CSpeed:70nsLowVoltageRange:2.
7Vto3.
6VLowActivePowerandStandbyPowerEasyMemoryExpansionwithCEandOEFeaturesTTLCompatibleInputsandOutputsAutomaticPowerDownwhenDeselectedCMOSforOptimumSpeedandPowerAvailableinStandardPb-freeandnonPb-free28-Pin(300-mil)NarrowSOIC,28-PinTSOP-I,and28-PinReverseTSOP-IPackagesFunctionalDescriptionTheCY62256VN[1]familyiscomposedoftwohighperformanceCMOSstaticRAM'sorganizedas32Kwordsby8bits.
EasymemoryexpansionisprovidedbyanactiveLOWchipenable(CE)andactiveLOWoutputenable(OE)andtristatedrivers.
Thesedeviceshaveanautomaticpowerdownfeature,reducingthepowerconsumptionbyover99%whendeselected.
AnactiveLOWwriteenablesignal(WE)controlsthewriting/readingoperationofthememory.
WhenCEandWEinputsarebothLOW,dataontheeightdatainput/outputpins(I/O0throughI/O7)iswrittenintothememorylocationaddressedbytheaddresspresentontheaddresspins(A0throughA14).
Readingthedeviceisaccomplishedbyselectingthedeviceandenablingtheoutputs,CEandOEactiveLOW,whileWEremainsinactiveorHIGH.
Undertheseconditions,thecontentsofthelocationaddressedbytheinformationonaddresspinsarepresentontheeightdatainput/outputpins.
Theinput/outputpinsremaininahighimpedancestateunlessthechipisselected,outputsareenabled,andwriteenable(WE)isHIGH.
.
A9A8A7A6A5A4A3A2COLUMNDECODERROWDECODERSENSEAMPSINPUTBUFFERPOWERDOWNWEOEI/O0CEI/O1I/O2I/O332Kx8ARRAYI/O7I/O6I/O5I/O4A10A13A11A12AA14A10LogicBlockDiagramNote1.
Forbestpracticerecommendations,refertotheCypressapplicationnote"SystemDesignGuidelines"onhttp://www.
cypress.
com.
[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage2of13PinConfigurationsProductPortfolioProductRangeVCCRange(V)PowerDissipationOperating,ICC(mA)Standby,ISB2(μA)MinTyp[2]MaxTyp[2]MaxTyp[2]MaxCY62256VNLLCom'l2.
73.
03.
611300.
15CY62256VNLLInd'l2.
73.
03.
611300.
110CY62256VNLLAutomotive-A2.
73.
03.
611300.
110CY62256VNLLAutomotive-E2.
73.
03.
611300.
113012345678910111415162019181721242322TopViewNarrowSOIC121325282726GNDA6A7A8A9A10A11A12A13WEVCCA4A3A2A1I/O7I/O6I/O5I/O4A14A5I/O0I/O1I/O2CEOEA0I/O322232425262728125101115141312161918173420217689OEA1A2A3A4WEVCCA5A6A7A8A9A0CEI/O7I/O6I/O5GNDI/O2I/O1I/O4I/O0A14A10A11A13A12I/O3TSOPITopView(nottoscale)ReversePinout22232425262728125101115141312161918173420217689OEA1A2A3A4WEVCCA5A6A7A8A9A0CEI/O7I/O6I/O5GNDI/O2I/O1I/O4I/O0A14A10A11A13A12I/O3TSOPITopView(nottoscale)PinDefinitionsPinNumberTypeDescription1–10,21,23–26InputA0–A14.
AddressInputs11–13,15–19Input/OutputI/O0–I/O7.
Datalines.
Usedasinputoroutputlinesdependingonoperation27Input/ControlWE.
WhenselectedLOW,aWRITEisconducted.
WhenselectedHIGH,aREADisconducted20Input/ControlCE.
WhenLOW,selectsthechip.
WhenHIGH,deselectsthechip22Input/ControlOE.
OutputEnable.
ControlsthedirectionoftheI/Opins.
WhenLOW,theI/Opinsbehaveasoutputs.
WhendeassertedHIGH,I/Opinsaretristated,andactasinputdatapins14GroundGND.
Groundforthedevice28PowerSupplyVCC.
PowersupplyforthedeviceNote2.
Typicalvaluesareincludedforreferenceonlyandarenotguaranteedortested.
TypicalvaluesaremeasuredatVCC=VCCTyp,TA=25°C,andtAA=70ns.
[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage3of13MaximumRatingsExceedingmaximumratingsmayimpairtheusefullifeofthedevice.
Theseuserguidelinesarenottested.
StorageTemperature65°Cto+150°CAmbientTemperaturewithPowerApplied55°Cto+125°CSupplyVoltagetoGroundPotential(Pin28toPin14)0.
5Vto+4.
6VDCVoltageAppliedtoOutputsinHigh-ZState[3]0.
5VtoVCC+0.
5VDCInputVoltage[3]0.
5VtoVCC+0.
5VOutputCurrentintoOutputs(LOW)20mAStaticDischargeVoltage.
2001V(perMIL-STD-883,Method3015)Latch-upCurrent.
200mAOperatingRangeDeviceRangeAmbientTemperature(TA)[4]VCCCY62256VNCommercial0°Cto+70°C2.
7Vto3.
6VIndustrial40°Cto+85°CAutomotive-A40°Cto+85°CAutomotive-E40°Cto+125°CElectricalCharacteristicsOvertheOperatingRangeParameterDescriptionTestConditions-70UnitMinTyp[2]MaxVOHOutputHIGHVoltageIOH=1.
0mAVCC=2.
7V2.
4VVOLOutputLOWVoltageIOL=2.
1mAVCC=2.
7V0.
4VVIHInputHIGHVoltage2.
2VCC+0.
3VVVILInputLOWVoltage–0.
50.
8VIIXInputLeakageCurrentGNDVIH,VIN>VIHorVINVCC–0.
3VVIN>VCC–0.
3VorVINVCC–0.
3V,VIN>VCC–0.
3VorVIN1.
4VDATARETENTIONMODEtRCEVCC[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage5of13SwitchingCharacteristicsOvertheOperatingRange[7]ParameterDescriptionCY62256VN-70UnitMinMaxReadCycletRCReadCycleTime70nstAAAddresstoDataValid70nstOHADataHoldfromAddressChange10nstACECELOWtoDataValid70nstDOEOELOWtoDataValid35nstLZOEOELOWtoLow-Z[8]5nstHZOEOEHIGHtoHigh-Z[8,9]25nstLZCECELOWtoLow-Z[8]10nstHZCECEHIGHtoHigh-Z[8,9]25nstPUCELOWtoPowerUp0nstPDCEHIGHtoPowerDown70nsWriteCycle[10,11]tWCWriteCycleTime70nstSCECELOWtoWriteEnd60nstAWAddressSetuptoWriteEnd60nstHAAddressHoldfromWriteEnd0nstSAAddressSetuptoWriteStart0nstPWEWEPulseWidth50nstSDDataSetuptoWriteEnd30nstHDDataHoldfromWriteEnd0nstHZWEWELOWtoHigh-Z[8,9]25nstLZWEWEHIGHtoLow-Z[8]10nsNotes7.
Testconditionsassumesignaltransitiontimeof5nsorlesstimingreferencelevelsofVCC/2,inputpulselevelsof0toVCC,andoutputloadingofthespecifiedIOL/IOHand100-pFloadcapacitance.
8.
Atanygiventemperatureandvoltagecondition,tHZCEislessthantLZCE,tHZOEislessthantLZOE,andtHZWEislessthantLZWEforanygivendevice.
9.
tHZOE,tHZCE,andtHZWEarespecifiedwithCL=5pFasin(b)ofACTestLoads.
Transitionismeasured±200mVfromsteady-statevoltage.
10.
TheinternalwritetimeofthememoryisdefinedbytheoverlapofCELOWandWELOW.
BothsignalsmustbeLOWtoinitiateawriteandeithersignalcanterminateawritebygoingHIGH.
Thedatainputset-upandholdtimingshouldbereferencedtotherisingedgeofthesignalthatterminatesthewrite.
11.
Theminimumwritecycletimeforwritecycle#3(WEcontrolled,OELOW)isthesumoftHZWEandtSD.
[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage6of13SwitchingWaveformsFigure3.
ReadCycleNo.
1[12,13]Figure4.
ReadCycleNo.
2[13,14]Figure5.
WriteCycleNo.
1(WEControlled)[10,15,16]Notes12.
Deviceiscontinuouslyselected.
OE,CE=VIL.
13.
WEisHIGHforreadcycle.
14.
AddressvalidpriortoorcoincidentwithCEtransitionLOW.
15.
DataI/OishighimpedanceifOE=VIH.
16.
IfCEgoesHIGHsimultaneouslywithWEHIGH,theoutputremainsinahighimpedancestate.
17.
Duringthisperiod,theI/Osareinoutputstateandinputsignalsshouldnotbeapplied.
ADDRESSDATAOUTPREVIOUSDATAVALIDDATAVALIDtRCtAAtOHA50%50%DATAVALIDtRCtACEtDOEtLZOEtLZCEtPUDATAOUTHIGHIMPEDANCEIMPEDANCEICCISBtHZOEtHZCEtPDOECEHIGHVCCSUPPLYCURRENTtHDtSDtPWEtSAtHAtAWtWCDATAI/OADDRESSCEWEOEtHZOEDATAINVALIDNOTE17[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage7of13Figure6.
WriteCycleNo.
2(CEControlled)[10,15,16]Figure7.
WriteCycleNo.
3(WEControlled,OELOW)[11,16]SwitchingWaveforms(continued)tWCtAWtSAtHAtHDtSDtSCEWEDATAI/OADDRESSCEDATAINVALIDDATAI/OADDRESStHDtSDtLZWEtSAtHAtAWtWCtHZWEDATAINVALIDNOTE17WECE[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage8of13TypicalDCandACCharacteristics1.
61.
81.
00.
60.
40.
21.
61.
41.
21.
00.
8552512555251251.
21.
00.
8NORMALIZEDtAA–14–12–10–8–6–40.
01.
01.
522.
5OUTPUTSOURCECURRENT(mA)SUPPLYVOLTAGE(V)NORMALIZEDSUPPLYCURRENTvs.
SUPPLYVOLTAGEAMBIENTTEMPERATURE(°C)vs.
AMBIENTTEMPERATUREAMBIENTTEMPERATURE(°C)OUTPUTVOLTAGE(V)0.
81.
51.
00.
51.
652.
12.
63.
13.
6NORMALIZEDtAASUPPLYVOLTAGE(V)NORMALIZEDACCESSTIME6420.
01.
02.
03.
0OUTPUTSINKCURRENT(mA)0OUTPUTVOLTAGE(V)OUTPUTSINKCURRENTvs.
OUTPUTVOLTAGE0.
60.
40.
20.
0NORMALIZEDICCNORMALIZEDICCTA=25°C0.
60.
002.
52.
0TA=25°C1.
455251052.
52.
01.
5AMBIENTTEMPERATURE(°C)1.
00.
50.
0–0.
5ISB3.
0STANDBYCURRENTISB2μAVCC=3.
0VVcc=3.
3V1.
61.
82.
02.
42.
83.
23.
61.
41.
2VCC=3.
0V0.
58101214TA=25°CTA=25°CNORMALIZEDSUPPLYCURRENTvs.
AMBIENTTEMPERATUREvs.
SUPPLYVOLTAGENORMALIZEDACCESSTIMEvs.
AMBIENTTEMPERATUREOUTPUTSOURCECURRENTvs.
OUTPUTVOLTAGE[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage9of13TypicalDCandACCharacteristics(continued)30.
025.
020.
015.
010.
05.
00200400600800DELTAt(ns)AACAPACITANCE(pF)TYPICALACCESSTIMECHANGEvs.
OUTPUTLOADING1.
251.
000.
75102030NORMALIZEDICCCYCLEFREQUENCY(MHz)NORMALIZEDICCvs.
CYCLETIME0.
010000.
50TA=25°CVIN=0.
5V1VCC=3.
0VTA=25°CVCC=3VTruthTableCEWEOEInputs/OutputsModePowerHXXHigh-ZDeselect/PowerDownStandby(ISB)LHLDataOutReadActive(ICC)LLXDataInWriteActive(ICC)LHHHigh-ZDeselect,OutputDisabledActive(ICC)OrderingInformationSpeed(ns)OrderingCodePackageDiagramPackageTypeOperatingRange70CY62256VNLL-70SNC51-8509228-Pin(300-mil)NarrowSOICCommercialCY62256VNLL-70SNXC28-Pin(300-mil)NarrowSOIC(Pb-Free)CY62256VNLL-70ZC51-8507128-PinTSOPICY62256VNLL-70ZXC28-PinTSOPI(Pb-Free)CY62256VNLL-70SNXI51-8509228-Pin(300-mil)NarrowSOIC(Pb-Free)IndustrialCY62256VNLL-70ZI51-8507128-PinTSOPICY62256VNLL-70ZXI28-PinTSOPI(Pb-Free)CY62256VNLL-70ZRI51-8507428-PinReverseTSOPICY62256VNLL-70ZRXI28-PinReverseTSOPI(Pb-Free)CY62256VNLL-70ZXA51-8507128-PinTSOPI(Pb-Free)Automotive-ACY62256VNLL-70SNXE51-8509228-Pin(300-mil)NarrowSOIC(Pb-Free)Automotive-ECY62256VNLL-70ZXE51-8507128-PinTSOPI(Pb-Free)CY62256VNLL-70ZRXE51-8507428-PinReverseTSOPI(Pb-Free)ContactyourlocalCypresssalesrepresentativeforavailabilityofotherparts[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage10of13PackageDiagramsFigure8.
28-Pin(300-mil)SNC(NarrowBody)(51-85092)51-85092-*B[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage11of13Figure9.
28-PinTSOP1(8*13.
4mm)(51-85071)51-85071-*G[+]FeedbackCY62256VNDocument#:001-06512Rev.
*BPage12of13Figure10.
28-PinReverseTSOP1(8*13.
4mm)(51-85074)51-85074-*F[+]FeedbackDocument#:001-06512Rev.
*BRevisedSeptember25,2009Page13of13Allproductsandcompanynamesmentionedinthisdocumentmaybethetrademarksoftheirrespectiveholders.
CY62256VNCypressSemiconductorCorporation,2006-2009.
Theinformationcontainedhereinissubjecttochangewithoutnotice.
CypressSemiconductorCorporationassumesnoresponsibilityfortheuseofanycircuitryotherthancircuitryembodiedinaCypressproduct.
Nordoesitconveyorimplyanylicenseunderpatentorotherrights.
Cypressproductsarenotwarrantednorintendedtobeusedformedical,lifesupport,lifesaving,criticalcontrolorsafetyapplications,unlesspursuanttoanexpresswrittenagreementwithCypress.
Furthermore,Cypressdoesnotauthorizeitsproductsforuseascriticalcomponentsinlife-supportsystemswhereamalfunctionorfailuremayreasonablybeexpectedtoresultinsignificantinjurytotheuser.
TheinclusionofCypressproductsinlife-supportsystemsapplicationimpliesthatthemanufacturerassumesallriskofsuchuseandindoingsoindemnifiesCypressagainstallcharges.
AnySourceCode(softwareand/orfirmware)isownedbyCypressSemiconductorCorporation(Cypress)andisprotectedbyandsubjecttoworldwidepatentprotection(UnitedStatesandforeign),UnitedStatescopyrightlawsandinternationaltreatyprovisions.
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Disclaimer:CYPRESSMAKESNOWARRANTYOFANYKIND,EXPRESSORIMPLIED,WITHREGARDTOTHISMATERIAL,INCLUDING,BUTNOTLIMITEDTO,THEIMPLIEDWARRANTIESOFMERCHANTABILITYANDFITNESSFORAPARTICULARPURPOSE.
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TheinclusionofCypress'productinalife-supportsystemsapplicationimpliesthatthemanufacturerassumesallriskofsuchuseandindoingsoindemnifiesCypressagainstallcharges.
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ECNNo.
SubmissionDateOrig.
ofChangeDescriptionofChange**426504SeeECNNXRNewDataSheet*A488954SeeECNNXRAddedAutomotiveproductUpdatedorderingInformationtable*B276923909/25/09VKN/AESACorrectedVILdescriptionintheElectricalCharacteristicstable[+]Feedback