2024年3月6日发(作者：新思域两厢版)

元器件交易网90CR283/DS90CR28428-BitChannelLink-66MHzJuly1997DS90CR283/DS90CR28428-BitChannelLink-66MHzGeneralDescriptionTheDS90CR283transmitterconverts28bitsofCMOS/TTLdataintofourLVDS(LowVoltageDifferentialSignaling)-lockedtransmitcl90CR284receiverconvertstheLVDSdatastreamsbackinto28bitsofCMOS/ns-mitclockfrequencyof66MHz,266MHzclock,thedatathroughputis1.848Gbit/s(231Mbytes/s).stanceparallelsingle-endedbusestypicallyrequireagroundwireperactivesignal(andhaveverylimitednoiserejectioncapability).Thus,fora28-bitwidedatabusandoneclock,eChannelLinkchipsetasfewas11conductors(4datapairs,1clockpairandaminimumofoneground)ovidesa80%reductioninrequiredcablewidth,whichprovidesasystemcostsavings,reducescon-nectorphysicalsizeandcost,andreducesshieldingrequire-mentsduetothecables’28CMOS/mple,74-bitnibblesor39-bit(byte+parity)esnnnnnnnnnnn66MHzclocksupportUpto231Mbytes/sbandwidthLowpowerCMOSdesign(<610mW)PowerDownmode(<0.5mWtotal)Upto1.848Gbit/sdatathroughputNarrowbusreducescablesizeandcost290mVswingLVDSdevicesforlowEMIPLLrequiresnoexternalcomponentsLowprofile56-leadTSSOPpackageRisingedgedatastrobeCompatiblewithTIA/EIA-644LVDSStandardBlockDiagramsDS90CR283DS90CR284DS012889-27DS012889-1OrderNumberDS90CR283MTDSeeNSPackageNumberMTD56OrderNumberDS90CR284MTDSeeNSPackageNumberMTD56TRI-STATE?isaregisteredtrademarkofNationalSemiconductorCorporation.?

元器件交易网DiagramsDS90CR2832

元器件交易网oluteMaximumRatings(Note1)IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Voltage(VCC)?0.3Vto+6VCMOS/TTLInputVoltage?0.3Vto(VCC+0.3V)CMOS/TTLOuputVoltage?0.3Vto(VCC+0.3V)LVDSReceiverInputVoltage?0.3Vto(VCC+0.3V)LVDSDriverOutputVoltage?0.3Vto(VCC+0.3V)LVDSOutputShortCircuitDurationContinuousJunctionTemperature+150?CStorageTemperatureRange?65?Cto+150?CLeadTemperature(Soldering,4sec.)+260?CMaximumPackagePowerDissipation@+25?CMTD56(TSSOP)Package:DS90CR2831.63WDS90CR2841.61WPackageDerating:DS90CR28312.5mW/?Cabove+25?CDS90CR28412.4mW/?Cabove+25?CThisdevicedoesnotmeet2000VESDrating(Note4)RecommendedOperatingConditionsSupplyVoltage(VCC)OperatingFreeAirTemperature(TA)ReceiverInputRangeSupplyNoiseVoltage(VCC)Min4.75?100Nom5.0+25Max5.25+702.4UnitsV?CV100mVP-PElectricalCharacteristicsOverrecommendedoperatingsupplyandtemperaturerangesunlessotherwisespecifiedSymbolVIHVILVOHVOLVCLIINIOSVOD?VODVOS?VOSParameterHighLevelInputVoltageLowLevelInputVoltageHighLevelOutputVoltageLowLevelOutputVoltageInputClampVoltageInputCurrentOutputShortCircuitCurrentDifferentialOutputVoltageChangeinVODbetweenComplementaryOutputStatesOffsetVoltageChangeinMagnitudeofVOSbetweenComplementaryOutputStatesOutputShortCircuitCurrentOutputTRI-STATE?CurrentDifferentialInputHighThresholdDifferentialInputLowThresholdInputCurrentVIN=+2.4V,VCC=5.0VVIN=0V,VCC=5.0VRL=100?,C(Figures1,2)ICCTZTransmitterSupplyCurrent,PowerDownPowerDown=LowDriverOutputsinTRI-STATEunderPowerDownMode125?ALConditionsMin2.0GNDTypMaxVCC0.8UnitsVVVVV?AmAmVmVVmVCMOS/TTLDCSPECIFICATIONSIOH=?0.4mAIOL=2mAICL=?18mAVIN=VCC,GND,2.5Vor0.4VVOUT=0VRL=100?3.84.90.1?0.790.3?1.5±5.1±10?120LVDSDRIVERDCSPEClFlCATIONS25.11.251.37535IOSIOZVTHVTLIINVOUT=OV,RL=100?PowerDown=0V,VOUT=0VorVCCVCM=+1.2V?100?2.9?5mA?AmVmV?A?AmAmAmA±1±10+100LVDSRECEIVERDCSPECIFlCATIONS±10±10f=32.5MHzf=37.5MHzf=66MHz495170636484TRANSMITTERSUPPLYCURRENTICCTWTransmitterSupplyCurrent,WorstCase=5pF,

元器件交易网ctricalCharacteristicsSymbolICCRWParameterReceiverSupplyCurrent,WorstCaseReceiverSupplyCurrent,PowerDown(Continued)OverrecommendedoperatingsupplyandtemperaturerangesunlessotherwisespecifiedConditionsCL=8pF,WorstCasePattern(Figures1,3)ICCRZPowerDown=LowReceiverOutputsinPreviousStateduringPowerDownMode110?Af=32.5MHzf=37.5MHzf=66MHzMinTyp6470110Max7785140UnitsmAmAmARECEIVERSUPPLYCURRENTNote1:“AbsoluteMaximumRatings”lesof“ElectricalCharacteristics”2:TypicalvaluesaregivenforVCC=5.0VandTA=+25?3:esarereferencedtogroundunlessotherwisespeci-fied(exceptVODand?VOD).Note4:ESDRating:HBM(1.5k?,100pF)PLLVCC≥1000VAllotherpins≥2000VEIAJ(0?,200pF)≥150VNote5:itterSwitchingCharacteristicsOverrecommendedoperatingsupplyandtemperaturerangesunlessotherwisespecifiedSymbolLLHTLHLTTCITTCCSTPPos0TPPos1TPPos2TPPos3TPPos4TPPos5TPPos6TCIPTCIHTCILTSTCTHTCTCCDTPLLSTPDDParameterLVDSLow-to-HighTransitionTime(Figure2)LVDSHigh-to-LowTransitionTime(Figure2)TxCLKINTransitionTime(Figure4)TxOUTChannel-to-ChannelSkew(Note6)(Figure5)TransmitterOutputPulsePositionforBit0f=66MHz(Figure16)TransmitterOutputPulsePositionforBit1TransmitterOutputPulsePositionforBit2TransmitterOutputPulsePositionforBit3TransmitterOutputPulsePositionforBit4TransmitterOutputPulsePositionforBit5TransmitterOutputPulsePositionforBit6TxCLKINPeriod(Figure6)TxCLKINHighTime(Figure6)TxCLKINLowTime(Figure6)TxINSetuptoTxCLKIN(Figure6)TxINHoldtoTxCLKIN(Figure6)TxCLKINtoTxCLKOUTDelay@25?C,VCC=5.0V(Figure8)TransmitterPhaseLockLoopSet(Figure10)TransmitterPowerDownDelay(Figure14)MinTyp0.750.75Max1.51.58350?0.301.703.605.908.3010.4012.70150.35T0.35T52.53.50(1/7)Tclk(2/7)Tclk(3/7)Tclk(4/7)Tclk(5/7)Tclk(6/7)TclkT0.5T0.5T3.51.58.5101000.302.504.506.759.0011.1013.40500.65T0.65TnsnsnsnsnsnsmsnsUnitsnsnsnspsnsnsnsnsnsnsNote6:4

元器件交易网eiverSwitchingCharacteristicsOverrecommendedoperatingsupplyandtemperaturerangesunlessotherwisespecifiedSymbolCLHTCHLTRSKMRCOPRCOHRCOLRSRCRHRCRCCDRPLLSRPDDParameterCMOS/TTLLow-to-HighTransitionTime(Figure3)CMOS/TTLHigh-to-LowTransitionTime(Figure3)RxINSkewMargin(Note7),f=40MHzVCC=5V,TA=25?C(Figure17)f=66MHzRxCLKOUTPeriod(Figure7)RxCLKOUTHighTime(Figure7)RxCLKOUTLowTime(Figure7)RxOUTSetuptoRxCLKOUT(Figure7)RxOUTHoldtoRxCLKOUT(Figure7)RxCLKINtoRxCLKOUTDelay@25?C,VCC=5.0V(Figure9)ReceiverPhaseLockLoopSet(Figure11)ReceiverPowerDownDelay(Figure11)f=40MHzf=66MHzf=40MHzf=66MHzf=40MHzf=66MHzf=40MHzf=66MHz7006001564.310.57.04.52.56.546.45.210.71014.295T50MinTyp2.52.0Max4.04.0Unitsnsnspspsnsnsnsnsnsnsnsnsnsnsms?sNote7:ReceiverSkergintakesintoaccounttransmitteroutputskew(TCCS)andthesetupandholdtime(internaldatasamplingwindow),allowingforLVDScableskewdependentontype/lengthandsourceclock(TxCLKIN)≥cableskew(type,length)+sourceclockjitter(cycletocycle)ACTimingDiagramsDS012889-2FIGURE1.“WORSTCASE”90CR283(Transmitter)90CR284(Receiver)CMOS/

元器件交易网imingDiagrams(Continued)90CR283(Transmitter)InputClockTransitionTimeDS012889-8Note8:MeasurementsatVdiff=0VNote9:10:TxCLKOUTDifferentialLow→90CR283(Transmitter)90CR283(Transmitter)Setup/HoldandHigh/90CR284(Receiver)Setup/HoldandHigh/6

元器件交易网imingDiagrams(Continued)90CR283(Transmitter)90CR284(Receiver)90CR283(Transmitter)90CR284(Receiver)

元器件交易网imingDiagrams(Continued)itsofLVDSinOneClockCycleDS012889-16FIGURE13.28ParallelTTLDataInputsMappedtoLVDSOutputs(DS90CR283)8

元器件交易网imingDiagrams(Continued)itterLVDSOutputPulsePositionMeasurementDS012889-20SW—SetupandHoldTime(Internaldatasamplingwindow)TCCS—TransmitterOutputSkewRSKM≥CableSkew(type,length)+SourceClockJitter(cycletocycle)CableSkew—typically10ps–

元器件交易网90CR283PinDescription—ChannelLinkTransmitterPinNameTxINTxOUT+TxOUT?TxCLKINTxCLKOUT+TxCLKOUT?PWRDOWNVCCGNDPLLVCCPLLGNDLVDSVCCLVDSGNDI/OIOOIOOIIIIIIINo.28441111451213TTLLevelinputsPositiveLVDSdifferentiaingedgeactsasdatastrobePositiveLVDSdifferenion(lowinput)TRI-STATEStheoutputs,ensuringlowcurrentatpowerdownPowersupplypinsforTTLinputsGroundpinsforTTLinputsPowersupplypinforPLLGroundpinsforPLLPowersupplypinforLVDSoutputsGroundpinsforLVDSoutputsDescriptionDS90CR284PinDescription—ChannelLinkReceiverPinNameRxIN+RxIN?RxOUTRxCLKIN+RxCLKIN?RxCLKOUTPWRDOWNVCCGNDPLLVCCPLLGNDLVDSVCCLVDSGNDI/OIIOIIOIIIIIIINo.44281111451213PositiveLVDSdifferentialdatainputsNegativeLVDSdifferentialdatainputsTTLleveloutputsPositiveLVDSdifferentialion(lowinput)maintainsthereceiveroutputsinthepreviousstatePowersupplypinsforTTLoutputsGroundpinsforTTLoutputsPowersupplyforPLLGroundpinforPLLPowersupplypinforLVDSinputsGroundpinsforLVDSinputsDescriptionApplicationsInformationTheChannelLinkdevices-ample,forlowerdatarate(clockrate)andshortercablelengths(<2m),herspeed/longdistanceapplicationsthemedia’ncableconstruc-tionsprovidetighterskew(matchedelectricallengthbe-tweentheconductorsandpairs).Twin-coaxforexample,hasbeendemonstratedatdistancesasgreatas5metersandwiththemaximumdatatransferof1.848Gbit/onalapplicationsinformationcanbefoundinthefollowingNa-tionalInterfaceApplicationNotes:AN=####AN-1041AN-1035AN-806TopicIntroductiontoChannelLinkPCBDesignGuidelinesforLVDSandLinkDevicesTransmissionLineTheoryAN=####AN-905AN-916TopicTransmissionLineCalculationsandDifferentialImpedanceCableInformationCABLES:Acableinterfacebetweent21-bitCHANNELLINKchipset(DS90CR213/214)requiresfourpairsofsignalwiresandthe28-bitCHANNELLINKchipset(DS90CR283/284)alcable/connectorinterfacewouldhaveaconstant100?sorecommendedthatcableskewremainbelow350ps(@66MHzclockrate)tiontothefourorfivecablepairsthatcarrydataandclock,itisrecommendedtoprovideatleastoneadditionalconductor(orpair)

元器件交易网licationsInformation(Continued)plicationsincludeflatribbon,flex,bboncable,flexandtwistedpairgenerallyper-formwellinshortpoint-to-pingribboncable,itisrecommendedtoplaceagroundlinebetweeneachdiffn-Coaxcableapplications,-tendedpoint-to-pointapplicationsshouldalsoemployerallshieldresultsinimprovedtransmis-sionparameterssuchasfasterattainablespeeds,longerdistancesbetweeh-speedtransportofLVDSsignalr,-Coaxhedesignconsiderationsdiscussedhereandlistedinthesupplementalapplicationnotesproc-ommendedthatthedesignerassessthetradeoffsofeachappAYOUT:ToobtainthemaximumbenefitfromthenoiseandEMIreductionsofLVDS,fadifferentialpairshouldalwaysbeadjacenttoeliminatenoiseinterferencefromothersignalsarddesignershouldalsoanyhighspeeddesign,theimped-ancediscontinuitiesshouldbelimited(reducethenumbersofviasandno90degreeanglesontraces).Anydiscontinui-tieswhichdooccuronoouldbetakentoensurethatthedifferentialtraceimpedancematchthediffer-entialimpedanceoftheselectedphysicalmedia(thisimped-anceshouldalsomatchthevalueoftheterminationresistorthatisconnectedacrossthedifferentialpairatthereceiver’sinput).Finally,thelocationoftheCHANNELLINKTxOUT/RxINpinsshouldbheseconsider-ationswilllimitreflectionsINPUTS:AATION:UseofcurrentNNELLINKchipsetwillnormallyrequireasingle100?resistorbe-tweenthualvalueoftheterminationresistorshouldbeselectedtomatchthedifferentialmodecharacteristicimpedance(90?to120?typical)tionalpull-uporpull-downresistoremountresistorsarerecommendesistorsshouldbeplacedascloseaspossibletothereceiverinpLINGCAPACITORS:Bypassingcapacitorsarenenservativeapproachthreeparallel-connecteddecouplingcapacitors(Multi-LayeredCe-ramictypeinsurfacemountformfactor)betweeneachVCCandthegroundplane(s)eeca-pacitorvaluesare0.1?F,0.01?Fand0.001?ignershouldemploywidetracesforpdspaceislimitingthenumberofbypasscapacitors,thePLLVCCshouldreceivethemostfiltering/

元器件交易网licationsInformation(Continued)easuresprovidemoremarginforchannel-to-channelskewandinterconnectskewasapartoftheoveralljitter/ENTIALMODENOISEMAR-GIN:ThetypicalsignalswingforLVDSis300mVcenteredat+NNELLINKreceiversupportsa100mVthresholmodeprotectionisofmoreim-portancetothesystem’pportsaninputvoltagerangeofGroundto+lowsfora±1.0VshiftingoftEQUENCINGANDPOWERDOWNMODE:Out-putsoftheCHANdevicemaybeplacedintoapowerdownmodeatanytimebyassertingthePower-downpin(activelow).Totalpowerdissipationforeachde-vicewilldecreaseto5?W(typical).TheCHANNELLINKchipsetisdesignedtoprotectirtothetransmitboardislost,thereceiverclocks(inputandoutput)aoutputs(RxOUT)ereceiverboardlosespower,tislimited(5mAperinput)bythefixedcurrentmodedrivers,LLINKDecouplingConfigurationCLOCKJITTER:TheCHANNELLINKdevicesemployaPthofmple,entialskew(?twithinonedifferentialpair),interconnectskew(?tofonedifferentialpairtoan-other)andclockjitterwilstbetakendualbypassingofeachVCCtogroundwillminimizethenoisepassedontothePLL,12

元器件交易网13

元器件交易网90CR283/DS90CR28428-BitChannelLink-66MHzPhysicalDimensionsinches(millimeters)unlessotherwisenoted56-LeadMoldedThinShrinkSmallOutlinePackage,JEDECOrderNumberDS90CR283MTDorDS90CR284MTDNSPackageNumberMTD56LIFESUPPORTPOLICYNATIONAL’SPRODUCTSARENOTAUTHORIZEDFORUSEASCRITICALCOMPONENTSINLIFESUPPORTDE-VICESORSYSTEMSWITHOUTTHEEXPRESSWherein:pportdevicesorsystemsaredevicesorsys-deviceorsystemwhosefailuretoperformcanberea-temswhich,(a)areintendedforsurgicalimplantintosonablyexpectedtocausethefailureofthelifesupportthebody,or(b)supportorsustainlife,andwhosefail-deviceorsystem,erformwhenproperlyusedinaccordancewithinstructionsforuseprovidedinthelabeling,alSemiconductorCorporationAmericasTel:1-800-272-9959Fax:1-800-737-7018Email:support@ionalSemiconductorEuropeFax:+49(0)180-5308586Email:t@tschTel:+49(0)180-5308585EnglishTel:+49(0)180-5327832Fran?aisTel:+49(0)180-5329358ItalianoTel:+49(0)180-5341680NationalSemiconductorAsiaPacificCustomerResponseGroupTel:65-2544466Fax:65-2504466Email:t@:81-3-5620-6175Fax:ionaldoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandNationalreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications.

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