ꢀ
IS62/65WV2568DALLꢀ
IS62/65WV2568DBLL
ꢀ
256Kꢀxꢀ8ꢀLOWꢀVOLTAGE,ꢀ
ULTRAꢀLOWꢀPOWERꢀCMOSꢀSTATICꢀRAMꢀ ꢀ
FEBRUARYꢀ2012
ꢀꢀꢀ
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
FEATURES
DESCRIPTION
•ꢀ High-speedꢀaccessꢀtime:ꢀꢀ35ns,ꢀ45ns,ꢀ55ns
•ꢀ CMOSꢀlowꢀpowerꢀoperation
TheꢀISSIꢀIS62/65WV2568DALLꢀandꢀIS62/65WV2568DBLLꢀ
areꢀ high-speed,ꢀ 2Mꢀ bitꢀ staticꢀ RAMsꢀ organizedꢀ asꢀ
256Kꢀwordsꢀbyꢀ8ꢀbits.ꢀItꢀisꢀfabricatedꢀusingꢀISSI'sꢀhigh-
performanceꢀCMOSꢀtechnology.ꢀThisꢀhighlyꢀreliableꢀprocessꢀ
coupledꢀwithꢀinnovativeꢀcircuitꢀdesignꢀtechniques,ꢀyieldsꢀ
high-performanceꢀandꢀlowꢀpowerꢀconsumptionꢀdevices.
ꢀ –ꢀ36ꢀmWꢀ(typical)ꢀoperating
ꢀ –ꢀ9ꢀµWꢀ(typical)ꢀCMOSꢀstandby
•ꢀ TTLꢀcompatibleꢀinterfaceꢀlevels
•ꢀ Singleꢀpowerꢀsupplyꢀꢀ
WhenꢀCS1ꢀisꢀHIGHꢀ(deselected)ꢀorꢀwhenꢀCS2ꢀisꢀLOWꢀ
(deselected)ꢀ ,ꢀ theꢀ deviceꢀ assumesꢀ aꢀ standbyꢀ modeꢀ atꢀ
whichꢀtheꢀpowerꢀdissipationꢀcanꢀbeꢀreducedꢀdownꢀwithꢀ
CMOSꢀinputꢀlevels.
ꢀ –ꢀ1.8Vꢀ ꢀ10%ꢀVcc (IS62/65WV2568DALL)
ꢀ –ꢀ2.5V–3.6VꢀVcc (IS62/65WV2568DBLL)
EasyꢀmemoryꢀexpansionꢀisꢀprovidedꢀbyꢀusingꢀChipꢀEnableꢀ
andꢀOutputꢀEnableꢀinputs.ꢀTheꢀactiveꢀLOWꢀWriteꢀEnableꢀ
(WE)ꢀcontrolsꢀbothꢀwritingꢀandꢀreadingꢀofꢀtheꢀmemory.
•ꢀ Fullyꢀstaticꢀoperation:ꢀnoꢀclockꢀorꢀrefreshꢀ
required
•ꢀ Threeꢀstateꢀoutputs
TheꢀIS62/65WV2568DALLꢀandꢀIS62/65WV2568DBLLꢀareꢀ
packagedꢀinꢀtheꢀJEDECꢀstandardꢀ32-pinꢀTSOPꢀ(TYPEꢀI),ꢀ
sTSOPꢀ(TYPEꢀI),ꢀandꢀ36-pinꢀminiꢀBGA.
•ꢀ Industrialꢀtemperatureꢀavailable
•ꢀ Lead-freeꢀavailableꢀ
FUNCTIONALꢀBLOCKꢀDIAGRAM
256K x 8
MEMORY ARRAY
A0-A17
DECODER
VCC
GND
I/O
DATA
CIRCUIT
COLUMN I/O
I/O0-I/O7
CS2
CS1
OE
CONTROL
CIRCUIT
WE
Copyrightꢀ©ꢀ2012ꢀIntegratedꢀSiliconꢀSolution,ꢀInc.ꢀAllꢀrightsꢀreserved.ꢀISSIꢀreservesꢀtheꢀrightꢀtoꢀmakeꢀchangesꢀtoꢀthisꢀspecificationꢀandꢀitsꢀproductsꢀatꢀanyꢀtimeꢀwithoutꢀ
notice.ꢀISSIꢀassumesꢀnoꢀliabilityꢀarisingꢀoutꢀofꢀtheꢀapplicationꢀorꢀuseꢀofꢀanyꢀinformation,ꢀproductsꢀorꢀservicesꢀdescribedꢀherein.ꢀCustomersꢀareꢀadvisedꢀtoꢀobtainꢀtheꢀlatestꢀ
versionꢀofꢀthisꢀdeviceꢀspecificationꢀbeforeꢀrelyingꢀonꢀanyꢀpublishedꢀinformationꢀandꢀbeforeꢀplacingꢀordersꢀforꢀproducts.
IntegratedꢀSiliconꢀSolution,ꢀInc.ꢀdoesꢀnotꢀrecommendꢀtheꢀuseꢀofꢀanyꢀofꢀitsꢀproductsꢀinꢀlifeꢀsupportꢀapplicationsꢀwhereꢀtheꢀfailureꢀorꢀmalfunctionꢀofꢀtheꢀproductꢀcanꢀreason-
ablyꢀbeꢀexpectedꢀtoꢀcauseꢀfailureꢀofꢀtheꢀlifeꢀsupportꢀsystemꢀorꢀtoꢀsignificantlyꢀaffectꢀitsꢀsafetyꢀorꢀeffectiveness.ꢀProductsꢀareꢀnotꢀauthorizedꢀforꢀuseꢀinꢀsuchꢀapplicationsꢀ
unlessꢀIntegratedꢀSiliconꢀSolution,ꢀInc.ꢀreceivesꢀwrittenꢀassuranceꢀtoꢀitsꢀsatisfaction,ꢀthat:
a.)ꢀtheꢀriskꢀofꢀinjuryꢀorꢀdamageꢀhasꢀbeenꢀminimized;
b.)ꢀtheꢀuserꢀassumeꢀallꢀsuchꢀrisks;ꢀand
c.)ꢀpotentialꢀliabilityꢀofꢀIntegratedꢀSiliconꢀSolution,ꢀIncꢀisꢀadequatelyꢀprotectedꢀunderꢀtheꢀcircumstances
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774 ꢀ
1
Rev.ꢀ A
02/09/2012