CONEC

Lumberg Automation

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Taoglas

Marketing Executive

confirm the pin configuration before placing the circuit to place it rightThis article explains BC558 transistor pinout.

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Mobile: 080-022-0540
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TPK America LLC

Online Advertising Manager

This article explains BC558 transistor pinout.This first circuit is a light sensor and the second is dark sensor circuit.

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Mobile: 056-140-0550
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Bellnix Co., LTD.

Web Application Project Manager

This first circuit is a light sensor and the second is dark sensor circuit.5AMax Collector-Emitter Voltage (VCE): –80VMax Collector-Base Voltage (VCB): –80VMax Emitter-Base Voltage (VEBO): –5VMax Collector Dissipation (Pc): 12.

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Murrplastik

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  • Qimonda
  • National Control Devices
  • Hittite (Analog Devices)
  • HVM Technology, Inc.
Efinix, Inc.

RWR80S1R07FRRSL_Vishay Dale

5AMax Collector-Emitter Voltage (VCE): –80VMax Collector-Base Voltage (VCB): –80VMax Emitter-Base Voltage (VEBO): –5VMax Collector Dissipation (Pc): 12.DS1307isalow-powerFullBinary(BCD)RealTimeClock(RTC)ICwith56bytesofSVRAMthatcommunicatesviaI2CProtocol.ThisblogprovidesyouadetailedintroductiontoDS1307RTC,includingitspinout,application,howdoesitworkinacircuit,whatsitsdifferencebetweenDS3231andmore,hopethisbloghelpsandthankyouforreading!ThisisatutorialvideoteachingpeoplehowtoconnectDS1307withArduino.CatalogDS1307DescriptionDS1307PinoutDS1307FeaturesDS1307ParameterWhatisI2CProtocolDS1307WorkingPrincipleHowtoUseDS1307DS1307vsDS3231DS1307ApplicationDS1307ManufacturerDS1307PackageComponentDatasheetFAQDS1307DescriptionTheDS1307serialreal-timeclock(RTC)isalow-power,fullbinarycodeddecimal(BCD)clock/calendarplus56bytesofNVSRAM.AddressanddataaretransferredseriallythroughanI2C,bidirectionalbus.Theclock/calendarprovidesseconds,minutes,hours,day,date,month,andyearinformation.Theendofthemonthdateisautomaticallyadjustedformonthswithfewerthan31days,includingcorrectionsforleapyear.Theclockoperatesineitherthe24-houror12-hourformatwithAM/PMindicator.TheDS1307hasabuilt-inpower-sensecircuitthatdetectspowerfailuresandautomaticallyswitchestothebackupsupply.Timekeepingoperationcontinueswhilethepartoperatesfromthebackupsupply.TheDS1307canoperateinthefollowingtwomodes:SlaveReceiverMode(WriteMode):SerialdataandclockarereceivedthroughSDAandSCL.SlaveTransmitterMode(ReadMode):Thefirstbyteisreceivedandhandledasintheslavereceivermode.However,inthismode,thedirectionbitwillindicatethatthetransferdirectionisreversed.DS1307PinoutDS1307RTCDS1307RTCPinoutPinNumberPinNameDescription1,2X1,X2CrystalOscillatorshouldbeconnectedtothesepins3V-BatConnectedtoPositiveterminalofthebattery4GroundGroundpinoftheIC5,6SCLandSDAPinsforI2CcommunicationwithCPU7SQW/OutSquarewaveoutputdriverpintoobtainsquarewavefrequencies.8VccPowerstheICtypically5VDS1307FeaturesI2CInterfaceRTCICOperatingVoltage:5VLessthan500nAcurrentwhenoperatingwithbattery56bytesSVRAMOperatesinpowerorbatterymodeProgrammablesquarewaveoutputpinAvailableinPDIPandSOpackageDS1307ParameterType:Clock/CalendarFeatures:LeapYearNVSRAMSquareWaveOutputBaseProductNumber:DS1307Interface:IC2-WireSerialMemorySize:56BTimeFormat:HHDateFormat:YY-MM-DD-ddVoltage-SupplyBattery:2V~3.5VCurrent-Timekeeping(Max):200A@5VWhatisI2CProtocolI2Cisaserialprotocolthattransfersdatabitbybit.I2CcombinesthebestcharacteristicsofSPIandUART.Wecancontrolmanyslavedevicesbyusingitwithasinglemicrocontroller.DataistransferredintheformofmessagesinI2C,andthemessagesarethenconvertedintodata.Eachmessagecontainsanaddressframecontainingabinaryaddressofthedevicesundercontrol.TheI2CprotocolislessexpensivetoimplementthantheSPIprotocol.SPIcontrolsasingleslavedevice,whereasI2Ccontrolsmultipledevices.LetstakealookattheI2Cprotocoldiagramforabetterunderstanding.DS1307WorkingPrincipleLetslookatacircuitthatusestheDS1307togetabetterunderstandingofhowitworks.Inthissimplecircuit,weconnectthechipsfirsttwopins,X1andX2,toa32.768kHzcrystaloscillatorasthesource.Thethirdpinislinkedtoa3Vbattery.Weprovidea5vsupplyatVcc,whichcanbeprovidedbyamicrocontroller.IfVccisnotsupplied,thereadandwriteconditionsaredisabled.WhenusingtheI2cprotocol,adevicemusthavestartandstopconditionsinordertocommunicatewithotherdevices.Weprovideaspecificidentificationandaddressregistertoadeviceinordertoobtainthestartcondition.Forabetterunderstandingofstopandstartconditionletshavealookatclockfigure.HowtoUseDS1307TheDS1307isan8-pinICthatrunson5VandcommunicateswiththeCPUviatheI2Cprotocol.AtypicalapplicationcircuitfortheDS1307isshownbelow,takenfromtheDS1307datasheet.Asyoucansee,theIChasSCL(SerialClock)andSDA(SerialData)pinsthatitusestocommunicatewiththeCPU;bothofthesepinsmustbepulledhighusingaresistor.TheICcanbepoweredbyapplying5VtotheVccpin;ifthepowerfails,itwillautomaticallyswitchtobatterymode,obtainingpowerfromaLithiumcellconnectedtopinVbatandground.PinsX1andX2areusedtoconnectthecrystaloscillator,whichistypicallya32.7KHzQuartzcrystal.TheSQWpingeneratesaPWMsquarewavewithprogrammablefrequenciesof1Hz,4KHz,8KHz,or32KHz.Thispinalsonecessitatestheuseofapull-upresistor.OnlytheI2CprotocolisusedtoexchangedatabetweentheCPUandtheRTCIC.Thiscommunicationfacilitatesbothreadingandwriting.TheICcanprovideinformationsuchasaReal-TimeClockthatcountsseconds,minutes,hours,thedateofthemonth,themonth,thedayoftheweek,andtheyear,withLeap-YearCompensationValidUpto2100.DS1307vsDS3231DS3231TheDS3231isalsoalow-cost,extremelyaccurateI2Creal-timeclock(RTC).ButitisaRTCwithanintegratedtemperature-compensatedcrystaloscillator(TCXO)andcrystal.Thedeviceincorporatesabatteryinput,andmaintainsaccu-ratetimekeepingwhenmainpowertothedeviceisinter-rupted.ThemaindistinctionbetweentheDS3231andtheDS1370istheaccuracyoftime-keeping.TheDS1307includesanexternal32kHzcrystalfortimekeeping,thefrequencyofwhichiseasilyaffectedbyexternaltemperature.Asaresult,theclockisusuallyoffbyaboutfiveorsominutespermonth.TheDS3231,ontheotherhand,ismuchmoreaccuratebecauseitincludesaninternalTemperatureCompensatedCrystalOscillator(TCXO)thatisunaffectedbytemperature,allowingittobeaccuratetoafewminutesperyearatmost.DS1307isstillagreatvalueRTCthatwillserveyouwell,butDS3231isrecommendedforprojectsthatrequiremoreaccuratetime-keeping.DS1307ApplicationRoboticsGamingServersComputerPeripheralsGPSUtilitypowermetersDS1307ManufacturerMaximIntegrateddevelopsinnovativeanalogandmixed-signalproductsandtechnologiestomakesystemssmallerandsmarter,withenhancedsecurityandincreasedenergyefficiency.Weareempoweringdesigninnovationforourautomotive,industrial,healthcare,mobileconsumer,andclouddatacentercustomerstodeliverindustry-leadingsolutionsthathelpchangetheworld.DS1307PackageComponentDatasheetDS1307RTCDatasheetFAQWhatisDS1307?TheDS1307isalowpowerFullBinary(BCD)RealTimeClock(RTC)ICwith56bytesofSVRAMthatcommunicatesthroughI2CProtocol.TheICcanworkfromdirectlysupplyonVccandswitchtoBatteryautomaticallywhenrequired.HowdoIknowifDS1307isworking?IfyouhadaMasterI2C/SMBusEnginetoolbuiltup,youcouldconnectjustitandtheDS1307together(withpull-upsandotheressentialsofcourse)andquicklyseeifyoucancommunicatewiththeDS1307inafewminutes.Ifyoucan,thenyouknowthatyourDS1307isworkinganditcouldbeyourCcode.HowdoIresetmyRTCDS1307?Sotostart,removethebatteryfromtheholderwhiletheArduinoisnotpoweredorpluggedintoUSB.Wait3secondsandthenreplacethebattery.ThisresetstheRTCchip.WhyRTCisused?Areal-timeclock(RTC)isanelectronicdevice(mostoftenintheformofanintegratedcircuit)thatmeasuresthepassageoftime.Althoughthetermoftenreferstothedevicesinpersonalcomputers,serversandembeddedsystems,RTCsarepresentinalmostanyelectronicdevicewhichneedstokeepaccuratetime.

David Sanyo DenkiPower Amp Design
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