PCF8574 Remote 8-Bit I/O Expander for I2C Bus datasheet ...

1 PCF8574I2C or SMBus Master( Processor)Peripheral DevicesRESET, ENABLE,or control inputsINT or statusoutputsLEDsSDASCLINTA0A1A2 GNDVCCP0P1P2P3P4P5P6P7 ProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand JULY2001 REVISEDMARCH2015 PCF8574 Remote8-Bit I/O Expanderfor I2C Bus11 Features1 Low Standby-CurrentConsumptionof 10 A Max I2C to Parallel-PortExpander Open-DrainInterruptOutput CompatibleWithMostMicrocontrollers LatchedOutputsWithHigh-CurrentDriveCapab ilityfor DirectlyDrivingLEDs Latch-UpPerformanceExceeds100 mAPer JESD78, ClassII2 Applications TelecomShelters.

2 FilterUnits Servers Routers(TelecomSwitchingEquipment) PersonalComputers PersonalElectronics IndustrialAutomation Productswith gpio -LimitedProcessors(1)For all availablepackages,see the orderableaddendumatthe end of the DescriptionThis8-bitinput/output(I/O)exp anderfor the two-linebidirectionalbus (I2C) is designedfor mostmicrocontrollerfamiliesby wayof the I2C interface[serialclock(SCL),serialdata(SD A)].Thedevicefeaturesan 8-bitquasi-bidirectionalI/Oport(P0 P7),includinglatchedoutputswithhigh-curr entdrivecapabilityfor can be usedas an inputoroutputwithoutthe useof a poweron, the I/Osare this mode,only a currentsourceto VCCis (1)PARTNUMBERPACKAGE(PIN)BODYSIZE(NOM)PC F8574 TVSOP(20) (16) (16) (20) (16) (20) JULY2001.

3 PCF8574 SubmitDocumentationFeedbackCopyright 2001 2015,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryChangesfromRevisionI (November2015)to RevisionJPage Correctedpart (January2015)to RevisionIPage AddedJunctiontemperatureto ChangedSupplyCurrent(A) To: SupplyCurrent( A) and fSCL= 400 kHz to fSCL= 100 kHz in Figure1 ..6 ChangedSupplyCurrent(A) To: SupplyCurrent( A) in Figure1 ..6 ChangedSupplyCurrent(A) To: SupplyCurrent( A) and fSCL= 400 kHz to fSCL= 100 kHz in Figure3 ..6 ChangesfromRevisionG (May2008)to RevisionHPage AddedApplications,DeviceInformationtable ,PinFunctionstable,ESDR atingstable,ThermalInformationtable,Typi calCharacteristics,FeatureDescriptionsec tion,DeviceFunctionalModes,Applicationan dImplementationsection,PowerSupplyRecomm endationssection,Layoutsection,Deviceand DocumentationSupportsection,andMechanica l,Packaging, OR N PACKAGE(TOP VIEW)1201011234567891918171615141312P6 NCP5P4 GNDP3 NCP2 SCLNCSDAVCCA0A1 NCA2 INTP1P7P0 RGY PACKAGE(TOP VIEW)1234567891020191817161514131211 INTSCLNCSDAVCCA0A1 NCA2P0P7P6 NCP5P4 GNDP3 NCP2P1 DGV OR PW PACKAGE(TOP VIEW)RGT PACKAGE(TOP VIEW)

4 JULY2001 REVISEDMARCH2015 ProductFolderLinks: PCF8574 SubmitDocumentationFeedbackCopyright 2001 2015,TexasInstrumentsIncorporated5 Pin Configurationand FunctionsPin FunctionsPINTYPEDESCRIPTIONNAMERGTRGYDGV or PWDW or NA [ ]2, 3, 46, 7, 96, 7, 91, 2, 3 IAddressinputs0 through2. Connectdirectlyto VCCor not VCCthrougha , 8, 13, 183, 8, 13, 18- Do not connectP[ ]5, 6, 7, 8,10, 11, 12,1310, 11, 12,14, 16, 17,19, 2010, 11, 12,14, 16, 17,19, 204, 5, 6, 7,9, 10, 11,12I/OP- Connectto VCCthrougha pullupresistorSDA164415I/OSerialdataline . Connectto VCCthrougha Voltagesupply4 PCF8574 SCPS068J JULY2001 : PCF8574 SubmitDocumentationFeedbackCopyright 2001 2015,TexasInstrumentsIncorporated(1)Stre ssesbeyondthoselistedunderAbsoluteMaximu mRatingsmay causepermanentdamageto the stressratingsonly,and functionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditionsis not absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.

5 (2)The inputnegative-voltageand outputvoltageratingsmay be exceededif the inputand outputcurrentratingsare (unlessotherwisenoted)(1)MINMAXUNITVCCS upplyvoltagerange (2) + (2) + < 0 20mAIOKO utputclampcurrentVO< 0 20mAIOKI nput/outputclampcurrentVO< 0 or VO> VCC 400 AIOLC ontinuousoutputlow currentVO= 0 to VCC50mAIOHC ontinuousoutputhigh currentVO= 0 to VCC 4mAContinuouscurrentthroughVCCor GND 100mATJJ unctiontemperature150 CTstgStoragetemperaturerange 65150 C(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a than500-VHBMis possiblewith the necessaryprecautions.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a than250-VCDMis possiblewith the (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),per ANSI/ESDA/JEDECJS-001(1)1500 VCharged-devicemodel(CDM),per JEDEC specificationJESD22-C101(2) VCCVCC+ VCCVIOHHigh-leveloutputcurrent 1mAIOLLow-leveloutputcurrent25mATAO peratingfree-airtemperature 4085 C(1)For moreinformationabouttraditionaland new thermalmetrics,see theICPackageThermalMetricsapplicationrep ort(SPRA953).

6 (1) PCF8574 UNITDGVDWNPWRGTRGY20 PINS16 PINS16 PINS20 PINS16 PINS20 PINS JAJunction-to-ambientthermalresistance92 5767835337 JULY2001 REVISEDMARCH2015 ProductFolderLinks: PCF8574 SubmitDocumentationFeedbackCopyright 2001 2015,TexasInstrumentsIncorporated(1)All typicalvaluesare at VCC= 5 V, TA= 25 C.(2)The power-onresetcircuitresetsthe I2C-buslogicwith VCC< VPORand sets all I/Os to logichigh (withcurrentsourceto VCC). (unlessotherwisenoted)PARAMETERTESTCONDI TIONSVCCMINTYP(1)MAXUNITVIKI nputdiodeclampvoltageII= 18 V to 6 V (2)VI= VCCor GND,IO= 06 portVO= V to 6 V30300 AIOHTP port transientpullupcurrentHighduringacknowle dge,VOH= V 1mAIOLSDAVO= V to 6 V3mAP portVO= 1 V5 V1025 INTVO= V to 6 ,SDAVI= VCCor V to 6 V 5 AINT 5A0, A1, A2 5 IIHLP portVI VCCor VI V to 6 V 400 AICCO peratingmodeVI= VCCor GND,IO= 0,fSCL= 100 kHz6 V40100 AStandbymodeVI= VCCor GND,IO= VCCor V to 6 VCCor V to 6 V37pFP InterfaceTimingRequirementsoverrecommend edoperatingfree-airtemperaturerange(unle ssotherwisenoted)(seeFigure12)

7 MINMAXUNIT fsclI2C clockfrequency100kHztschI2C clockhigh time4 stsclI2C clocklow stspI2C spiketime100nstsdsI2C serialdatasetuptime250nstsdhI2C serialdatahold time0nsticrI2C inputrise time1 sticfI2C inputfall stocfI2C outputfall time (10-pFto 400-pFbus)300nstbufI2C bus free time betweenstop and ststsI2C startor ststhI2C startor repeatedstartconditionhold4 stspsI2C stop conditionsetup4 stvdValiddatatimeSCLlow to sCbI2C bus ,CL 100 pF (unlessotherwisenoted)(seeFigure13)PARAM ETERFROM(INPUT)TO(OUTPUT)MINMAXUNITtpvOu tputdatavalidSCLP port4 stsuInputdatasetuptimeP portSCL0 sthInputdatahold timeP portSCL4 stivInterruptvalidtimeP portINT4 stirInterruptresetdelaytimeSCLINT4 VTA= 25 CTA= 85 CTA= 40 CVOL(V)ISINK(mA) 5 VTA= 40 CTA= 25 CTA= 85 CVOL(V)ISINK(mA) Current ( A)mfSCL= 100 kHzAll I/Os unloadedSupply Voltage (V) VTA= 40 CTA= 25 CTA= 85 CISINK(mA)Vol (V)0102030405060708090 50 25 025 50 75 100 125 Temperature ( C)Supply Current ( A)

8 MSCL = VCCAll I/Os unloadedVCC= 5 VVCC= VVCC= V020406080100120 50 250255075 100 125 Temperature ( C)Supply Current ( A)mfSCL= 100 kHzAll I/Os unloadedVCC= 5 VVCC= VVCC= V6 PCF8574 SCPS068J JULY2001 : PCF8574 SubmitDocumentationFeedbackCopyright 2001 2015, 25 C (unlessotherwisenoted)Figure1. SupplyCurrentvs TemperatureFigure2. StandbySupplyCurrentvs TemperatureFigure3. SupplyCurrentvs SupplyVoltageFigure4. I/O SinkCurrentvs OutputLowVoltageFigure5. I/O SinkCurrentvs OutputLowVoltageFigure6. I/O SinkCurrentvs OutputLowVoltage050100150200250300350 50 25 025 50 75 100 125 Temperature ( C)VCC= 5 VVCC VOH(V)VCC= VVCC= VTA= 40 CTA= 25 CTA= 85 CVCC VOH(V)ISOURCE(mA) 5 VTA= 40 CTA= 85 CTA= 25 CVCC VOH(V)ISOURCE(mA)0100200300400500600 50 25 025 50 75 100 125 Temperature ( C)VCC= 5 V, ISINK= 10 mAVCC= V, ISINK= 10 mAVCC= 5 V,ISINK= 1 mAVCC= V,ISINK= 1mAVOL(mV) VTA= 40 CTA= 25 CTA= 85 CVCC VOH(V)ISOURCE(mA) JULY2001 REVISEDMARCH2015 ProductFolderLinks.

9 PCF8574 SubmitDocumentationFeedbackCopyright 2001 2015,TexasInstrumentsIncorporatedTypical Characteristics(continued)TA= 25 C (unlessotherwisenoted)Figure7. I/O OutputLowVoltagevs TemperatureFigure8. I/O SourceCurrentvs OutputHighVoltageFigure9. I/O SourceCurrentvs OutputHighVoltageFigure10. I/O SourceCurrentvs OutputHighVoltageFigure11. I/O HighVoltagevs TemperatureDUTRL= 1 k VCCCL= 10 pF to 400 VCCStopConditiontspsRepeatStartCondition Start orRepeatStartConditionSCLSDAS tartCondition(S)Bit 7 MSBBit 6 Bit 0 LSB(R/W)Acknowledge(A)StopCondition(P)2 Bytes for Complete DeviceProgrammingLOAD CIRCUITVOLTAGE WAVEFORMS ticfStopCondition(P) VCCPn8 PCF8574 SCPS068J JULY2001 : PCF8574 SubmitDocumentationFeedbackCopyright 2001 2015,TexasInstrumentsIncorporated7 ParameterMeasurementInformationFigure12.

10 I2C InterfaceLoadCircuitand VCCSCLDtpvSlaveAcknowledgeUnstableDataLa st Stable BitSDAPnAAAAS0100A1A2A0 1 data 11 PData 3 StartConditionAcknowledgeFrom SlaveAcknowledgeFrom SlaveData From PortData From PortSlave AddressR/W87654321tirtirtspstivData 1 data 2 data 3 VCCINTSCLView B BView A JULY2001 REVISEDMARCH2015 ProductFolderLinks: PCF8574 SubmitDocumentationFeedbackCopyright 2001 2015,TexasInstrumentsIncorporatedParamet erMeasurementInformation(continued)Figur e13. InterruptVoltageWaveformsFigure14. I2C Writ