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Features
• Fullduplex4channel850nmparallelactiveopticalcable• Transmissiondatarateupto10.3Gbit/sperchannel• SFF-8436QSFP+compliant• Hotpluggableelectricalinterface• DifferentialAC-coupledhighspeeddatainterface• 4channels850nmVCSELarray• 4channelsPINphotodetectorarray• Lowpowerconsumption<1.5W• Operatingcasetemperature0°Cto+70°C• 3.3Vpowersupplyvoltage• RoHS6compliant
ProductDescriptionLegrand’sQSFP-H40G-AOC7M-LEGQSFPactiveopticcablesareahighperformance,lowpowerconsumption,longreachinterconnectsolutionsupporting40GEthernet,fiberchannelandPCIe.ItiscompliantwiththeQSFPMSAandIEEEP802.3ba40GBASE-SR4.GigalightQSFPAOCisanassemblyof4full-duplexlanes,whereeachlaneiscapableoftransmittingdataatratesupto10Gb/s,providinganaggregatedrateof40Gb/s.Legrand’sQSFP+transceiversareRoHScompliantandlead-free.AbsoluteMaximumRatings
Parameter Symbol Min. Typ. Max. Unit
SupplyVoltage Vcc -0.5 4.0 V
InputVoltage Vin -0.3 Vcc+0.3 V
StorageTemperature Ts -20 85 °C
CaseOperatingTemperature Top 0 70 °C
Humidity(non-condensing) RH 5 95 %
Applications• Infinibandtransmissionat4ch
SDR,DDRandQDR• 40GBASE-SR4Ethernet• DataCenters
QSFP-H40G-AOC7M-LEGCISCO40GBASE-AOCQSFP+850NM7MREACHMPO
RecommendedOperatingConditions
Parameter Symbol Min. Typ. Max. Unit
SupplyVoltage Vcc 3.13 3.3 3.47 V
OperatingCaseTemperature Tca -5 70 °C
DataRatePerLane fd 2.5 10.3 Gbps
Humidity Rh 5 85 %
PowerDissipation Pm 1.5 W
FiberBandRadius Rb 3 cm
Specifications
Parameter Symbol Min. Typ. Max. Unit Notes
Differentialinputimpedance Zin 90 100 110 ohm 2
DifferentialOutputimpedance Zout 90 100 110 ohm 3
Differentialinputvoltageamplitude ΔVin 300 1100 mVp-p
Differentialoutputvoltageamplitude ΔVout 500 800 mVp-p
Skew Sw 300 ps
BitErrorRate BR E-12
InputLogicLevelHigh VIH 2.0 Vcc V
InputLogicLevelLow VIL 0 0.8 V
OutputLogicLevelHigh VOH Vcc-0.5 Vcc V
OutputLogicLevelLow VOL 0 0.4 V
Notes:1. BER=10^-12;PRBS2^[email protected]. DifferentialinputvoltageamplitudeismeasuredbetweenTxnPandTxnN.3. DifferentialoutputvoltageamplitudeismeasuredbetweenRxNPandRxnN.
OpticalCharacteristics
Parameter Symbol Min. Typ. Max. Unit Notes
Transmitter
CenterWavelength λC 840 850 860 nm
RMSSpectralWidth ∆λ 0.65 nm
AverageLaunchPowerperChannel Pout -7.5 -2.5 dBm
Differenceinlaunchpowerbetweenanytwolanes(OMA) dB
ExtinctionRatio ER 3 dB
Peakpower,eachlane 4 dBm
Transmitteranddispersionpenalty(TDP),eachlane TDP 3.5 dB
AveragelaunchpowerofOFFtransmitter,eachlane -30 dB
TransmitterEyeMaskDefinition{X1,X2,X3,Y1,Y2,Y3} 0.23,0.34,0.43,0.27,0.33,0.4
HitRatio=5x10-5
Receiver
CenterWavelength λC 840 850 860 nm
StressedreceiversensitivityinOMA,eachlane -5.4 1
MaximumAveragepoweratreceiverinput,eachlane 2.4
ReceiverReflectance -12
Peakpower,eachlane 4
LOSAssert -30
LOSDe-Assert–OMA 7.5
LOSHysteresis 0.5
Note:
1. MeasuredwithconformancetestsignalatTP3forBER=10e-12PinDescriptions
Pin Logic Symbol Name/Descriptions Ref.
1 GND ModuleGround 1
2 CML-I Tx2- Transmitterinverteddatainput
3 CML-I Tx2+ Transmitternon-inverteddatainput
4 GND ModuleGround 1
5 CML-I Tx4- Transmitterinverteddatainput
6 CML-I Tx4+ Transmitternon-inverteddatainput
7 GND ModuleGround 1
8 LVTTL-I MODSEIL ModuleSelect 2
9 LVTTL-I ResetL ModuleReset 2
10 VCCRx +3.3vReceiverPowerSupply
11 LVCMOS-I/O SCL 2-wireSerialinterfaceclock 2
12 LVCMOS-I/O SDA 2-wireSerialinterfacedata 2
13 GND ModuleGround 1
14 CML-O RX3+ Receivernon-inverteddataoutput
15 CML-O RX3- Receiverinverteddtaoutput
16 GND ModuleGround 1
17 CML-O RX1+ Receivernon-inverteddataoutput
18 CML-O RX1- Receiverinverteddataoutput
19 GND ModuleGround 1
20 GND ModuleGround 1
21 CML-O RX2- Receiverinverteddataoutput
22 CML-O RX2+ Receivernon-inverteddataoutput
23 GND ModuleGround 1
24 CML-O RX4- Receiverinverteddataoutput
25 CML-O RX4+ Receivernon-inverteddataoutput
26 GND ModuleGround 1
27 LVTTL-O ModPrsL ModulePresent,internalpulleddowntoGND
28 LVTTL-O IntL Interruptoutput,shouldbepulleduponhostboard 2
29 VCCTx +3.3vTransmitterPowerSupply
30 VCC1 +3.3vPowerSupply
31 LVTTL-I LPMode LowPowerMode 2
32 GND ModuleGround 1
33 CML-I Tx3+ Transmitternon-inverteddatainput
34 CML-I Tx3- Transmitterinverteddatainput
35 GND ModuleGround 1
36 CML-I Tx1+ Transmitternon-inverteddatainput
37 CML-I Tx1- Transmitterinverteddatainput
Note:
1. GNDisthesymbolforsignalandsupply(power),Connectthesedirectlytothehostboardsignalcommongroundplane
2. VccRx,Vcc1andVccTxarethereceivingandtransmissionpowersuppliersandshallbeappliedconcurrently.VccRx,Vcc1andVccTxmaybeinternallyconnectedwithintheQSFP+.Theconnectorpinsareeachratedforamaximumcurrentof500mA.
PinAssignmentandPinDescriptionModSeILPinTheModSelLisaninputpin.Whenheldlowbythehost,themodulerespondsto2-wireserialcommunicationcommands.TheModSelLallowstheuseofmultipleQSFPmodulesonasingle2-wireinterfacebus.WhentheModSelLis“High”,themodulewillnotrespondtoany2-wireinterfacecommunicationfromthehost.ModSelLhasaninternalpull-upinthemodule.ResetLPinReset.LPMode_Resethasaninternalpull-upinthemodule.AlowlevelontheResetLpinforlongerthantheminimumpulselength(t_Reset_init)initiatesacompletemodulereset,returningallusermodulesettingstotheirdefaultstate.ModuleResetAssertTime(t_init)startsontherisingedgeafterthelowlevelontheResetLpinisreleased.Duringtheexecutionofareset(t_init)thehostshalldisregardallstatusbitsuntilthemoduleindicatesacompletionoftheresetinterrupt.ThemoduleindicatesthisbypostinganIntLsignalwiththeData_Not_Readybitnegated.Notethatonpowerup(includinghotinsertion)themodulewillpostthiscompletionofresetinterruptwithoutrequiringareset.LPModePinOperateinthelowpowermode(lessthan1.5Wpowerconsumption)Thispinactivehighwilldecreasepowerconsumptiontolessthan1W.
ModPrsLPinModPrsLispulleduptoVcconthehostboardandgroundedinthemodule.TheModPrsLisasserted“Low”whenthemoduleisinsertedandde-asserted“High”whenthemoduleisphysicallyabsentfromthehostconnector.IntLPinIntLisanoutputpin.When“Low”,itindicatesapossiblemoduleoperationalfaultorastatuscriticaltothehostsystem.Thehostidentifiesthesourceoftheinterruptbyusingthe2-wireserialinterface.TheIntLpinisanopencollectoroutputandmustbepulleduptoVcconthehostboard.PowerSupplyFilteringThehostboardshouldusethepowersupplyfilteringshownbelow.DIAGNOSTICMONITORINGINTERFACEDigitaldiagnosticsmonitoringfunctionisavailableonallGigalightQSFPAOCs.A2-wireserialinterfaceprovidesusertocontactwithmodule.ThestructureofthememoryisshowninFigure4.Thememoryspaceisarrangedintoalower,singlepage,addressspaceof128bytesandmultipleupperaddressspacepages.Thisstructurepermitstimelyaccesstoaddressesinthelowerpage,suchasInterruptFlagsandMonitors.Lesstimecriticaltimeentries,suchasserialIDinformationandthresholdsettings,areavailablewiththePageSelectfunction.TheinterfaceaddressusedisA0xhandismainlyusedfortimecriticaldatalikeinterrupthandlinginordertoenableaone-time-readforalldatarelatedtoaninterruptsituation.Afteraninterrupt,IntL,hasbeenasserted,thehostcanreadouttheflagfieldtodeterminetheaffectedchannelandtypeofflag.
ModuleBlockDiagramMemoryMap
MechanicalSpecifications
