DS3662中文资料
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DS3662QuadHighSpeedTrapezoidal™BusTransceiver
GeneralDescriptionTheDS3662isaquadhighspeedSchottkybustransceiverintendedforusewithterminated120Ωimpedancelines.Itisspecificallydesignedtoreducenoiseinunbalancedtrans-missionsystems.Theopencollectordriversgeneratepre-cisetrapezoidalwaveformswithriseandfalltimesof15ns(typical),whicharerelativelyindependentofcapacitiveload-ingconditionsontheoutputs.Thisreducesnoisecouplingtotheadjacentlineswithoutanyappreciableimpactonthemaximumdatarateobtainablewithhighspeedbustrans-ceivers.Inaddition,thereceiversusealowpassfilterincon-junctionwithahighspeedcomparator,tofurtherenhancethenoiseimmunity.Tightlycontrolledthresholdlevelsonthereceiverprovideequalrejectiontobothnegativeandpositivegoingnoisepulsesonthebus.Theexternalterminationisintendedtobea180Ωresistorfromthebusto5Vlogicsupply,togetherwitha390Ωresistorfromthebustoground.Thebuscanbeterminatedatoneorbothends.AtwoinputNORgateisprovidedtodisablealldriversinapackagesimultaneously.FeaturesnPintopinfunctionalreplacementforDS8641nGuaranteedACspecificationsonnoiseimmunityandpropagationdelayoverthespecifiedtemperatureandsupplyvoltagerangenTemperatureinsensitivereceiverthresholdstrackbuslogiclevelnTrapezoidalbuswaveformsreducenoisecouplingtoadjacentlinesnPrecisionreceiverthresholdsprovidemaximumnoiseimmunityandsymmetricalresponsetopositiveandnegativegoingpulsesnOpencollectordriveroutputallowswire-ORconnectionnHighspeedSchottkytechnologyn15µAtypicalbusterminationcurrentwithnormalVCCor
withVCC=0V
nGlitchfreepowerup/downprotectiononthedriveroutputnTTLcompatibledriveranddisableinputs,andreceiveroutputs
BlockandConnectionDiagram
Trapezoidal™isatrademarkofNationalSemiconductorCorp.Dual-In-LinePackage
DS005803-1TopViewOrderNumberDS3662J,DS3662NorDS3662WMSeeNSPackageNumberJ16A,N16AorM16B
July1992DS3662QuadHighSpeed
Trapezoidal
BusTransceiver
©1999NationalSemiconductorCorporationDS005803www.national.com
元器件交易网www.cecb2b.comAbsoluteMaximumRatings(Note2)
IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Distributorsforavailabilityandspecifications.
SupplyVoltage7VInputandOutputVoltage5.5VStorageTemperatureRange−65˚Cto+150˚CMaximumPowerDissipation(Note1)at25˚CCavityPackage1509mWMoldedPackage1476mW
LeadTemperature(Soldering,4sec.)260˚CRecommendedOperatingConditions
MinMaxUnitsSupplyVoltage(VCC)4.755.25V
TemperatureRange(TA)070˚C
Note1:Deratecavitypackage10.1mW/˚Cabove25˚C;deratemoldedpackage11.8mW/˚Cabove25˚C.
ElectricalCharacteristics(Notes3,4)
SymbolParameterConditionsMinTypMaxUnitsDRIVERANDDISABLEINPUTSVIHLogical“1”InputVoltage2.0V
VILLogical“0”InputVoltage0.8V
IILogical“1”InputCurrentVIN=5.5V1mA
IIHLogical“1”InputCurrentVIN=2.4V40µA
IILLogical“0”InputCurrentVIN=0.4V−1−1.6mA
VCLInputDiodeClampVoltageICLAMP=−12mA−0.8−1.5V
DRIVEROUTPUT/RECEIVERINPUTVOLBLowLevelBusVoltageVDIS=0.8V,VIN=2V,IBUS=100mA0.60.9V
IIHBMaximumBusCurrentVIN=0.8V,VBUS=4V,VCC=5.25V10100µA
IILBMaximumBusCurrentVIN=0.8V,VBUS=4V,VCC=0V100µA
VIHHighLevelReceiverThresholdVIN=0.8V,VOL=16mA1.901.70V
VILLowLevelReceiverThresholdVIN=0.8V,IOH=−400µA1.701.50V
RECEIVEROUTPUTVOHLogical“1”OutputVoltageVIN=0.8V,VBUS=0.5V,IOH=−400µA2.43.2V
VOLLogical“0”OutputVoltageVIN=0.8V,VBUS=4V,IOL=16mA0.350.5V
IOSOutputShortCircuitCurrentVDIS=0.8V,VIN=0.8V,VBUS=0.5V,−40−70−100mA
VOS=0V,VCC=5.25V,(Note5)
ICCSupplyCurrentVDIS=0V,VIN=2V5090mA
SwitchingCharacteristics(Notes3,4)
SymbolParameterConditionsMinTypMaxUnitsPROPAGATIONDELAYStPLHDDisabletoBus“1”Figure12535ns
tPHLDDisabletoBus“0”2535ns
tPLHBDriverInputtoBus“1”Figure22030ns
tPHLBDriverInputtoBus“0”2030ns
tPLHRBustoLogical“1”ReceiverOutputFigure32540ns
tPHLRBustoLogical“0”ReceiverOutput2540ns
NOISEIMMUNITYtrB,tfBRiseandFallTimes(10%–90%)Figure2101520ns
oftheDriverOutputtnRReceiverNoiseRejectionNoResponseatReceiver2010ns
PulseWidthOutputasperFigure4Note2:“AbsoluteMaximumRatings”arethosevaluesbeyondwhichthesafetyofthedevicecannotbeguaranteed.Theyarenotmeanttoimplythatthedevicesshouldbeoperatedattheselimits.Thetablesof“ElectricalCharacteristics”and“RecommendedOperatingConditions”provideconditionsforactualdeviceoperation.
Note3:Unlessotherwisespecifiedmin/maxlimitsapplyacrossthesupplyandtemperaturerangelistedinthetableof“RecommendedOperatingConditions”.AlltypicalvaluesareforTA=25˚CandVCC=5V.
Note4:Allcurrentsintodevicepinsshownaspositive,outofdevicepinsasnegative,allvoltagesreferencedtogroundunlessotherwisenoted.Allvaluesshownasmaxorminonabsolutevaluebasis.
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