M24512--存储芯片手册免费下载

1/24February2005M24512512KbitSerialI²CBusEEPROMFEATURESSUMMARY■Two-WireI2CSerialInterfaceSupports400kHzProtocol■SupplyVoltageRanges:–1.8Vto5.5V(M24512−R)–2.5Vto5.5V(M24512−W)■WriteControlInput■BYTEandPAGEWRITE(upto128Bytes)■RANDOMandSEQUENTIALREADModes■Self-TimedProgrammingCycle■AutomaticAddressIncrementing■EnhancedESD/Latch-UpProtection■Morethan100,000Erase/WriteCycles■Morethan40-YearDataRetentionTable1.M24512devicesFigure1.PackagesReferencePartNumberM24512M24512−WM24512−RPDIP8(BN)81SO8(MW)208milwidthTSSOP8(DW)8181SO8(MN)150milwidthM245122/24TABLEOFCONTENTSFEATURESSUMMARY.............................................................1Table1.M24512devices.........................................................1Figure1.Packages..............................................................1Figure2.LogicDiagram..........................................................4Table2.SignalNames..........................................................4PowerOnReset................................................................4Figure3.DIP,SOandTSSOPConnections..........................................4SIGNALDESCRIPTION.............................................................5SerialClock(SCL)...............................................................5SerialData(SDA)...............................................................5ChipEnable(E0,E1,E2).........................................................5WriteControl(WC)..............................................................5Figure4.MaximumRPValueversusBusParasiticCapacitance(C)foranI2CBus............5Figure5.I2CBusProtocol........................................................6Table3.DeviceSelectCode......................................................6Table4.MostSignificantByte.....................................................6Table5.LeastSignificantByte....................................................6DEVICEOPERATION...............................................................7StartCondition.................................................................7StopCondition.................................................................7AcknowledgeBit(ACK).........................................................7DataInput.....................................................................7MemoryAddressing............................................................7Table6.OperatingModes........................................................7Figure6.WriteModeSequenceswithWC=1(datawriteinhibited).........................8WriteOperations...............................................................8ByteWrite.....................................................................8PageWrite....................................................................9Figure7.WriteModeSequenceswithWC=0(datawriteenabled).........................9Figure8.WriteCyclePollingFlowchartusingACK....................................10MinimizingSystemDelaysbyPollingOnACK......................................10Figure9.ReadModeSequences..................................................11ReadOperations..............................................................11RandomAddressRead.........................................................11CurrentAddressRead.........................................................11SequentialRead...............................................................12AcknowledgeinReadMode.....................................................12INITIALDELIVERYSTATE..........................................................12MAXIMUMRATING................................................................13Table7.AbsoluteMaximumRatings...............................................133/24M24512DCANDACPARAMETERS.........................................................14Table8.OperatingConditions(M24512–W)........................................14Table9.OperatingConditions(M24512–R)........................................14Table10.ACMeasurementConditions..............................................14Figure10.ACMeasurementI/OWaveform...........................................14Table11.InputParameters.......................................................15Table12.DCCharacteristics(M24512–W)..........................................15Table13.DCCharacteristics(1)(M24512–R)........................................15Table14.ACCharacteristics(M24512–W)..........................................16Table15.ACCharacteristics(1)(M24512–R)........................................16Figure11.ACWaveforms........................................................17PACKAGEMECHANICAL..........................................................18Figure12.PDIP8–8pinPlasticDIP,0.25mmleadframe,PackageOutline.................18Table16.PDIP8–8pinPlasticDIP,0.25mmleadframe,PackageMechanicalData..........18Figure13.SO8W–8leadPlasticSmallOutline,208milsbodywidth,PackageOutline........19Table17.SO8W–8leadPlasticSmallOutline,208milsbodywidth,PackageMechanicalData.19Figure14.SO8N–8leadPlasticSmallOutli