COS1042T

COS1042
www.cosine-ic.com 1Features
■VeryLowStandbyCurrent(5μA，typical)
■Suitablefor12Vand24Vsystems
■VIOSupplyPintointerfaceDirectlytoCAN
ControllersandMCUwith1.8Vto5.5VI/O
■SPLITOutputPintoStabilizeCommonMode
inBiasedSplitTerminationSchemes
■CANBusPinsareDisconnectedwhen
DeviceisUnpowered
■BusGlitch-FreePower-UpandPower-Down
■OverTemperatureProtection
■AllowUpto128Transceiversonthebus
■DataRateUpto5Mbps
■Half-duplexTransceiver
■AvailablePackaging:SOP8/DFN8/DIP8
Applications
■IndustrialAutomation,Control
■CANNetworks
Rev1.0
Copyright@2018CosineNanoelectronicsInc.Allrightsreserved
Theinformationprovidedhereisbelievedtobeaccurateandreliable.CosineNanoelectronicsassumes
noreliabilityforinaccuraciesandomissions.Specificationsdescribedandcontainedherearesubjected
tochangewithoutnoticeonthepurposeofimprovingthedesignandperformance.Allofthisinformation
describedhereinshouldnotbeimpliedorgrantedforanythirdparty.GeneralDescription
TheCOS1042isahigh-speedCAN,fault
toleranttransceiver.Itservestheinterface
betweenaControllerAreaNetwork(CAN)
protocolcontrollerandthephysicaltwo-wire
CANbus.TheCOS1042providesdifferential
transmitandreceivecapabilityfortheCAN
protocolcontroller,andisfullycompatiblewith
theISO-11898-2andISO-11898-5standards.
TheCOS1042canbeinterfaceddirectlyto
micro-controllerswithsupplyvoltagesfrom
1.8Vto5.5V.Ithasapassivebehaviortothe
CANbuswhenthesupplyvoltageisoff.
TheCOS1042hasaverylow-currentstandby
modewithbuswake-upcapability.Itenables
reliablecommunicationintheCANFDfast
phaseatdataratesupto5Mbit/s.
PinDiagramHigh-SpeedCANTransceiver
COS1042
www.cosine-ic.com 21.PinConfigurationandBlockDiagram
Figure1PinDiagram
PinDescription
PinName Description
1 TXDTransmitdigitaldatainput.LOWfordominantandHIGHfor
recessivebusstates.
2 GNDGround
3 VCCSupplyvoltage
4 RXDReceivedigitaldataoutput;readsoutdatafromthebuslines,
LOWfordominantandHIGHforrecessivebusstates.
5 SPLITCommon-modestabilizationoutput;inCOS1042Tversiononly
5 VIOSupplyvoltageforI/Oleveladapter;inCOS1042T/3versiononly
6 CANLLOW-levelCANbusI/Oline
7 CANHHIGH-levelCANbusI/Oline
8 STBStandbymodecontrolinput(Activehigh)
2.OrderingInformation
Model OrderNumber Package PackageOptionMarking
Information
COS1042COS1042T SOP-8 TapeandReel,4000COS1042T
COS1042T/3 SOP-8 TapeandReel,4000COS1042T/3
COS1042
www.cosine-ic.com 3
Note1:COS1042ThastheSPLITpin.
2:COS1042T/3hastheVIOpin.
Figure2.BlockDiagram
COS1042
www.cosine-ic.com 43.ProductSpecification
3.1AbsoluteMaximumRatings(1)
Parameter Min Max Unit
DCsupplyvoltageVCC -0.3 7 V
DCsupplyvoltageVIO -0.3 7 V
DCvoltageatTXD,RXD,STB -0.3 VIO+0.3 V
DCvoltageatCANH,CANLandSPLIT-44 +44 V
RXDoutputcurrent -8 +8 mA
Operatingjunctiontemperature -40 +125 °C
Storagetemperature -55 +150 °C
(1)Stressesexceedingtheabsolutemaximumratingsmaydamagethedevice.Thedevicemaynotfunctionorbeoperable
abovetherecommendedoperatingconditionsandstressingthepartstotheselevelsisnotrecommended.Inaddition,
extendedexposuretostressesabovetherecommendedoperatingconditionsmayaffectdevicereliability.Theabsolute
maximumratingsarestressratingsonly.
3.2ThermalData
Parameter Rating Unit
PackageThermalResistance150(SOP8)
90(DIP8)
57(DFN8,3×3)°C/W
3.3RecommendedOperatingConditions
Parameter Min. Typ. Max. Unit
VCCSupplyvoltage 4.5 5.0 5.5 V
VIOSupplyvoltageonPinVIO 2.8 3.3 5.5 V
Operatingambienttemperature -40 +85 °C
Operatingjunctiontemperature -40 +125 °C
COS1042
www.cosine-ic.com 53.4DCCharacteristics
(TypicalvaluesaretestedatTA=25oC,VCC=4.5Vto5.5V,VIO=2.8Vto5.5V,RL=60Ω,unlessotherwise
specified.)
Parameter Sym. Conditions Min.Typ.Max.Unit
VccSupply
Voltagerange VCC 4.55.05.5V
UndervoltagedetectionvoltageVUVD 3.54.04.5V
HysteresisofUVDcomparatorVUVDH 0.30.50.8V
Supplycurrent ICCRecessive;VTXD=VIO -410mA
Dominant;VTXD=0V -2240mA
Standbycurrent ICCSCOS1042T -1217μA
COS1042T/3 –1μA
VIOSupply
DigitalSupplyvoltagerangeVIO 2.8-5.5V
UndervoltagedetectionvoltageVUVIO 1.32.02.7V
Supplycurrent IVIONormalmode;VTXD=0orVIO-20200μA
Standbymode; -1217μA
BUSLine(CANH;CANL)Transmitter
Standbymode
outputvoltageVO(S)Standbymode,
noload-0.10+0.1V
Recessive
outputvoltageVO(R)Normalmode,VTXD=VIO,
noload20.5VCC3mV
Recessive
DifferentialoutputvoltageVO(DIFF)VTXD=VIO -50050mV
VTXD=VIO,noload -500050mV
Recessive
ShortcircuitoutputcurrentIO(SC)Normalmode,
VCANH=VCANH=-27Vto+32V-5 +5mA
Dominant
outputvoltageVO(D)PinCANH,VTXD=0V 2.753.54.5V
PinCANL,VTXD=0V 0.51.52.25V
Dominant
DifferentialoutputvoltageVO(DIFF)Dominant,Normalmode,
VTXD=0V1.52.03.0V
COS1042
www.cosine-ic.com 6Dominant
OutputvoltagesymmetryVO(D)(M)VDD-VCANH-VCANL -4000400mV
Dominant
ShortcircuitoutputcurrentIO(SC)CANH;VTXD=0,VCANH=0V-120-70-40mA
CANL;VTXD=0,VCANL=18V4085120mA
BUSLine(CANH;CANL)Receiver
RecessiveDifferentialinput
voltageVDIFF(RI)Normalmode;
12VVCANH,CANL+12V;-1.0-+0.5V
Standbymode;
12VVCANH,CANL+12V;-1.0-+0.4V
DominantDifferentialinput
voltageVDIFF(DI)Normalmode;
12VVCANH,CANL+12V;0.9-VDDV
Standbymode;
12VVCANH,CANL+12V;1.0-VDDV
DifferentialReceiverThresholdVTH(DIFF)Normalmode;
12VVCANH,CANL+12V;0.50.70.9V
Standbymode;
12VVCANH,CANL+12V;0.4-1.15V
DifferentialInputHysteresisVHYS(DIFF)Normalmode 50-200mV
Commonmodeinput
resistanceRIN 101525kΩ
Commonmoderesistance
matchingRIN(M) -1 -+1%
DifferentialinputresistanceRIN(DIFF) 203050kΩ
Commonmodeinput
capacitanceCIN(CM) – -20pF
DifferentialinputcapacitanceCIN(DIFF) – -10pF
Inputleakagecurrent ILIVCC=VTXD=VSTB=0V;
VCANH=VCANL=5V-5 +5μA
SPLIT;CommonModeStabilizationOutputPin(onlyforCOS1042T)
Outputvoltage VONormalmode;
ISPLIT=-500μAto+500μA0.3VCC0.5VCC0.7VCCV
Normalmode;
RL=1MΩ0.45VCC0.5VCC0.55VCCV
Leakagecurrent ILStandbymode;
VSPLIT=-24Vto+24V-5 +5μA
TXD,STBDigitalInputPin
HIGH-levelinputvoltage VIH 0.7VIO-VIO+0.3V
LOW-levelinputvoltage VIL -0.3-0.3VIOV
HIGH-levelinputcurrent IIH -1 +1μA
COS1042
www.cosine-ic.com 7TXD：LOW-levelinputcurrentIIL(TXD) -270-150-30μA
STB：LOW-levelinputcurrentIIL(STB) -20–1μA
RXDReceiveDataOutputPin
HIGH-leveloutputvoltageVOHIOH=-4mA VIO-0.4–V
LOW-leveloutputvoltageVOLIOL=4mA –0.4V
ThermalShutdown
Shutdown
junctiontemperatureTJ(SD) 160170180°C
Shutdown
temperatureHysteresisTJ(HYST) 203040°C
3.5DynamicCharacteristics
(TypicalvaluesaretestedatTA=25oC,VCC=4.5Vto5.5V,VIO=1.8Vto5.5V,RL=60Ω,unlessotherwise
specified.SeeFigure6,7,8)
Parameter Sym. Conditions Min.Typ.Max.Unit
DelayTXDLowtobusdominanttTXD-BUSONNormalmode -65-ns
DelayTXDHightobusrecessivetTXD-BUSOFFNormalmode -60-ns
DelaybusdominanttoRXDtBUSON-RXDNormalmode -65-ns
DelaybusrecessivetoRXDtBUSOFF-RXDNormalmode -65-ns
PropagationdelayTXDLow
toRXDLowtTXDL-RXDLNormalmode –220ns
PropagationdelayTXDHigh
toRXDHightTXDH-RXDHNormalmode –220ns
Buswake-upfiltertime tFLTR(WAKE)Standbymode 0.514μs
DelaystandbytonormalmodetWAKENegativeedgeonSTB2310μs
TXDdominanttime-outtimeTto(dom)TXDVTXD=0V,Normalmode0.325ms
Busdominanttime-outtimeTto(dom)BUSStandbymode 0.325ms
4.FunctionalDescription
4.1OperatingMode
TheCOS1042supportstwooperatingmodes,NormalandStandby,whichareselectedviapinSTB.
SeeTable1foradescriptionoftheoperatingmodesundernormalsupplyconditions.
COS1042
www.cosine-ic.com 8Table1.OperatingModes
Mode STB DRIVER RECEIVERRXD
LOW HIGH
NormalLOWEnable
(ON)Enable
(ON)BusdominantBusrecessive
StandbyHIGHDisable
(OFF)Onlylowpower
Busmonitoris
activeWake-uprequest
detectedNowake-uprequest
detected
4.1.1NormalMode
ALOWlevelonpinSTBselectsNormalmode.Inthismode,thetransceivercantransmitand
receivedataviathebuslinesCANHandCANL(seeFigure2fortheblockdiagram).Thedifferential
receiverconvertstheanalogdataonthebuslinesintodigitaldatawhichisoutputtopinRXD.The
slopesoftheoutputsignalsonthebuslinesarecontrolledinternallyandareoptimizedinawaythat
guaranteesthelowestpossibleEME.
4.1.2StandbyMode
AHIGHlevelonpinSTBselectsStandbymode.InStandbymode,thetransceiverisnotableto
transmitorcorrectlyreceivedataviathebuslines.ThetransmitterandNormal-modereceiverblocks
areswitchedofftoreducesupplycurrent,andonlyalow-powerdifferentialreceivermonitorsthebus
linesforactivity.Thewake-upfilterontheoutputofthelow-powerreceiverdoesnotlatchbus
dominantstates,butensuresthatonlybusdominantandbusrecessivestatesthatpersistlonger
thantfltr(wake)busarereflectedonpinRXD.InStandbymode,thebuslinesarebiasedtogroundto
minimizethesystemsupplycurrent.Thelow-powerreceiverissuppliedbyVIO,andiscapableof
detectingCANbusactivityevenifVIOistheonlysupplyvoltageavailable.WhenpinRXDgoesLOW
tosignalawake-uprequest,atransitiontoNormalmodewillnotbetriggereduntilSTBisforced
LOW.
4.2Fail-SafeFeatures
4.2.1TXDDominantTime-outFunction
A‘TXDdominanttime-out’timerisstartedwhenpinTXDissetLOW.IftheLOWstateonpinTXD
persistsforlongerthantto(dom)TXD,thetransmitterisdisabled,releasingthebuslinestorecessive
state.Thisfunctionpreventsahardwareand/orsoftwareapplicationfailurefromdrivingthebuslines
toapermanentdominantstate(blockingallnetworkcommunications).TheTXDdominanttime-out
timerisresetwhenpinTXDissettoHIGH.TheTXDdominanttime-outtimealsodefinesthe
minimumpossiblebitrateof40kbit/s.
COS1042
www.cosine-ic.com 94.2.2BusDominantTime-outFunction
InStandbymodea’busdominanttime-out’timerisstartedwhentheCANbuschangesfrom
recessivetodominantstate.Ifthedominantstateonthebuspersistsforlongerthantto(dom)bus,the
RXDpinisresettoHIGH.Thisfunctionpreventsaclampeddominantbus(duetoabusshort-circuit
orafailureinoneoftheothernodesonthenetwork)fromgeneratingapermanentwake-uprequest.
Thebusdominanttime-outtimerisresetwhentheCANbuschangesfromdominanttorecessive
state.
4.2.3InternalBiasingofTXDandSTBInputPins
PinsTXDandSTBhaveinternalpull-upstoVIOtoensureasafe,definedstateincaseoneorbothof
thesepinsareleftfloating.Pull-upcurrentsflowinthesepinsinallstates;bothpinsshouldbeheld
HIGHinStandbymodetominimizestandbycurrent.
4.2.4UndervoltageDetectiononPinsVccandVIO
ShouldVCCdropbelowtheVCCundervoltagedetectionlevel,VUVD(VCC),thetransceiverwillswitchto
Standbymode.ThelogicstateofpinSTBwillbeignoreduntilVCChasrecovered.ShouldVIOdrop
belowtheVIOundervoltagedetectionlevel,VUVD(VIO),thetransceiverwillswitchoffanddisengage
fromthebus(zeroload)untilVIOhasrecovered.
4.2.5Over-temperatureProtection
Theoutputdriversareprotectedagainstover-temperatureconditions.Ifthevirtualjunction
temperatureexceedstheshutdownjunctiontemperature,Tj(sd),theoutputdriverswillbedisabled
untilthevirtualjunctiontemperaturefallsbelowTj(sd)andTXDbecomesrecessiveagain.Including
theTXDconditionensuresthatoutputdriveroscillationduetotemperaturedriftisavoided.
4.2.6UnpoweredDevice
TheCOS1042isdesignedtobe“idealpassive”or“noload”totheCANbusifitisunpowered.The
busterminals(CANH,CANL)haveextremelylowleakagecurrentswhenthedeviceisunpoweredto
avoidloadingdownthebus.Thisiscriticalifsomenodesofthenetworkareunpoweredwhilethe
restoftheofnetworkremainsinoperation.Thelogicterminalsalsohaveextremelylowleakage
currentswhenthedeviceisunpoweredtoavoidloadingdownothercircuitsthatmayremain
powered.
COS1042
www.cosine-ic.com 104.2.7FloatingTerminals
TheCOS1042hasinternalpullupsoncriticalterminalstoplacethedeviceintoknownstatesifthe
terminalsfloat.TheTXDterminalispulleduptoVCCorVIOtoforcearecessiveinputlevelifthe
terminalfloats.TheSTBterminalisalsopulleduptoforcethedeviceintolowpowerStandbymodeif
theterminalfloats.
4.2.8CANBusShortCircuitCurrentLimiting
TheCOS1042hasThedevicehastwoprotectionfeaturesthatlimittheshortcircuitcurrentwhena
CANbuslineisshort-circuitfaultcondition:drivercurrentlimiting(bothdominantandrecessive
states)andTXDdominantstatetimeouttopreventpermanenthighershortcircuitcurrentofthe
dominantstateduringasystemfault.
4.3SPLITOutputPinandVIOSupplyPin
TwoversionsoftheCOS1042areavailable,onlydifferinginthefunctionofasinglepin.Pin5is
eitheraSPLIToutputpinoraVIOsupplypin.UsingtheSPLITpinontheCOS1042Tinconjunction
withasplitterminationnetwork(seeFigure3andFigure4)canhelptostabilizetherecessive
voltagelevelonthebus.ThiswillreduceEMEinnetworkswithDCleakagetoground(e.g.from
deactivatednodeswithpoorbusleakageperformance).InNormalmode,pinSPLITdeliversaDC
outputvoltageof0.5VCC.InStandbymodeorwhenVCCisoff,pinSPLITisfloating.Whennotused,
theSPLITpinshouldbeleftopen.
PinVIOontheCOS1042T/3shouldbeconnectedtothemicro-controllersupplyvoltage(seeFigure
5).ThiswilladjustthesignallevelsofpinsTXD,RXDandSTBtotheI/Olevelsofthe
micro-controller.PinVIOalsoprovidestheinternalsupplyvoltageforthelow-powerdifferential
receiverofthetransceiver.Forapplicationsrunninginlow-powermode,thisallowsthebuslinesto
bemonitoredforactivityevenifthereisnosupplyvoltageonpinVCC.ForversionsoftheCOS1042
withoutaVIOpin,theVIOinputisinternallyconnectedtoVCC.ThissetsthesignallevelsofpinsTXD,
RXDandSTBtolevelscompatiblewith5Vmicro-controllers.
COS1042
www.cosine-ic.com 11
Figure3.StabilizationCircuitryandApplicationforVersionwithSPLITPin
5.TypicalApplicationDiagrams
Figure4.TypicalApplicationwithCOS1042Tanda5VMicro-controller
COS1042
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Figure5.TypicalApplicationwithCOS1042T/3anda3VMicro-controller
Figure6.TestCircuitforMeasuringTransceiverDriverSymmetry
COS1042
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Figure7.CANTransceiverTimingDiagram
Figure8.CANFDTimingDefinitionAccordingtoISO11898-2
COS1042
www.cosine-ic.com 146.PackageInformation
6.1SOP8(PackageOutlineDimensions)
6.2DIP8(PackageOutlineDimensions)