TheULN2003isahigh-voltage,high-currentDarlingtontransistorarrayintegratedcircuit(IC)designedforinterfacingbetweenlow-levellogicandhigh-powerloads.ItconsistsofsevenNPNDarlingtonpairs,eachcapableofdrivingloadsupto50Vand500mA.KeyfeaturesoftheULN2003include:-Built-insuppressiondiodesforinductiveloadprotection-CompatiblewithTTL,CMOS,andPMOSlogiclevels-Highoutputcurrentcapability(500mAperchannel)-Wideoperatingvoltagerange(upto50V)-Common-cathodeclampdiodesforswitchinginductiveloadsTheICiscommonlyusedfordrivingrelays,steppermotors,lamps,andotherhigh-powerdevicesinapplicationslikeindustrialcontrolsystems,automotiveelectronics,andconsumerappliances.EachDarlingtonpairhasaninputpinforlogiccontrolandanoutputpinconnectedtotheload.TheULN2003simplifiescircuitdesignbyprovidingmultipledriversinasingle16-pinDIPorSOICpackage,reducingcomponentcountandboardspace.Fordetailedspecifications,electricalcharacteristics,andapplicationcircuits,refertothefullULN2003datasheetfromthemanufacturer.
