AK632256AW-15中文资料

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AK632256AW

262,144x32BitCMOS/BiCMOSStaticRandomAccess

Memory

TheAccutekAK632256AWSRAMModuleconsistsofeightfasthighperformanceSRAMsmountedonalowprofile,64pinSIMPCB.Themoduleutilizesfour28pin256Kx4SRAMsin300milSOJpackagesandfourdecouplingcapacitorchipsmountedoneachsideofaprintedcircuitboard.

TheSRAMsusedhavecommonI/Ofunctionsandsingleoutputen-ablefunctions.Also,fourseparatechipselectconnectionsareusedtoindependentlyenablethefourbytes.Themodulescanbesuppliedinavarietyofaccesstimevaluesfrom12nSECto45nSECinCMOSorBiCMOStechnology.

TheAccutekmoduleisdesignedtohaveamaximumseatedheightof0.600inchtoprovideforthelowestheightofftheboard.Byoff-set-mountingthebacksurfaceSRAMsthemodulecanbemountedineitherangledorstraight-upSIMsockets.ThemodulesconformtoJEDECstandardsizesandpin-outconfigurations.Usingtwopinsformodulememorydensityidentification,PD0andPD1,mini-mizesinterchangeabilityanddesignconsiderationswhenchangingfromonemodulesizetoanotherincustomerapplications.

FEATURES

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262,144x32bitorganization

JEDECStandardized64pinSIMformatAvailablewithsolderorgoldleads

PresenceDetectPD0andPD1foridentifyingmoduledensitysinglefunctionswithfourseparatechipselects·Lowheight,0.600inchmaximumseatedheight·Single5voltpowersuppy-AK632256AW

·Single3.3voltpowersupply-AK632256AW/3.3

·Downwardcompatiblewith128Kx32(AK632128),64Kx32(AK63264)and32Kx32(AK63232)

·Upwardcompatiblewith512Kx32(AK632512)and1Megx32(AK6321024)

·Fastaccesstimesrangefrom12nSECBiCMOSto45nSECCMOS

·TTL-compatibleinputsandoutputs

·Operatingtemperaturerangeinfreeair,00Cto700C

ELECTRICALSPECIFICATIONS

Timingdiagramsandbasicelectricalcharacteristicsarethoseofthestandard256Kx4SRAMsusedtoconstructthesemodules.Accutek’smoduledesignallowstheflexibilityofselectingindus-try-compatible256Kx4SRAMsfromseveralsemiconductormanu-facturers.

PINNOMENCLATURE

PINASSIGNMENT

FUNCTIONALDIAGRAM

MODULEOPTIONS

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