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100G Transceiver QSFP28 LR4 Fiber optical module cisco qsfp 100g 

QSFP28 LR4 100G Transceiver cisco qsfp 100g

QSFP28 LR4 100G transceiver cisco qsfp 100g


  • Compliant with 100GBASE-LR4
  • Support line rates from 103.125 Gbps to 111.81 Gbps
  • Integrated LAN WDM TOSA / ROSA for up to 10 km reach over SMF
  • Digital Diagnostics Monitoring Interface
  • Duplex LC optical receptacle
  • No external reference clock
  • Electrically hot-pluggable
  • Compliant with QSFP28 MSA with LC connector
  • Case operating temperature range:0°C to 70°C
  • Power dissipation < 3.5 W


  • 100G Ethernet & 100GBASE-LR4 cisco qsfp 100g


  • Compliant to IEEE 802.3ba, IEEE 802.3bm and 100G LR4
  • Compliant to SFF-8436
  • RoHS Compliant.

General Description


100G Transceiver integrates receiver and transmitter path on one module. In the transmit side, four lanes of serial data streams are recovered, retimed, and passed to four laser drivers. The laser drivers control 4- Distributed Feedback Laser (DFB) with center wavelength of 1296 nm, 1300nm, 1305nm and 1309 nm. The optical signals are multiplexed to a single –mode fiber through an industry standard LC connector. In the receive side, the four lanes of optical data streams are optically de-multiplexed by the integrated optical de-multiplexer. Each data stream is recovered by a PIN photo-detector and trans-impedance amplifier, retimed. This module features a hot-pluggable electrical interface, low power consumption and MDIO management interface.

100G Transceiver is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP28 Multi-Source Agreement (MSA) and compliant to IEEE 802.3bm.cisco qsfp 100g

Absolute Maximum Ratings

 Parameter Symbol Min. Typ. Max. Unit Note
 StorageTemperature Ts -40 – 85 ºC
 RelativeHumidity RH 5 – 95 %
 PowerSupplyVoltage VCC -0.3 – 4 V
 SignalInputVoltage Vcc-0.3 – Vcc+0.3 V

Recommended Operating Conditions

 Parameter Symbol Min. Typ. Max. Unit Note
 CaseOperatingTemperature Tcase 0 – 70 ºC Withoutairflow
 PowerSupplyVoltage VCC 3.13 3.3 3.47 V
 PowerSupplyCurrent ICC – 1060 mA
 DataRate BR 25.78125 Gbps Eachchannel
 TransmissionDistance TD – 10 km
 Coupledfiber Singlemodefiber9/125umSMF

Ⅲ Optical Characteristics

 Parameter Symbol Min Typ Max Unit NOTE
 WavelengthAssignment λ0 1294.53 1295.56 1296.59 nm
 λ1 1299.02 1300.05 1301.09 nm
 λ2 1303.54 1304.58 1305.63 nm
 λ3 1308.09 1309.14 1310.19 nm
 TotalOutput.Power POUT 10.5 dBm
 AverageLaunchPowerPerlane -4.3 4.5 dBm
 SpectralWidth(-20dB) σ 1 nm
 SMSR 30 dB
 OpticalExtinctionRatio ER 4 dB
 AveragelaunchPoweroffperlane Poff -30 dBm
 RIN RIN -128 dB/Hz
 OutputEyeMaskdefinition{X1,X2,X3,Y1,Y2,Y3} {0.25,0.4,0.45,0.25,0.28,0.4}
 RxSensitivityperlane RSENS -10.6 dBm 1
 LOSDe-Assert LOSD -30 dBm
 LOSAssert LOSA -12 dBm
 InputSaturationPower(Overload) Psat 4.5 dBm
 ReceiverReflectance Rr -26 dB



  1. Measured with a PRBS 231-1 test pattern, @25.78Gb/s, BER<10-12 .


IV Electrical Characteristics

 Parameter Symbol Min Typ Max Unit NOTE
 SupplyVoltage Vcc 3.13 3.3 3.47 V
 SupplyCurrent Icc 1060 mA
 Inputdifferentialimpedance Rin 100 Ω 1
 Differentialdatainputswing Vin,pp 180 1000 mV
 TransmitDisableVoltage VD Vcc–1.3 Vcc V
 TransmitEnableVoltage VEN Vee Vee+0.8 V 2
 Differentialdataoutputswing Vout,pp 300 850 mV 3
 LOSFault VLOSfault Vcc–1.3 VccHOST V 4
 LOSNormal VLOSnorm Vee Vee+0.8 V 4


  1. Connected directly to TX data input pins. AC coupled thereafter.
  2. Or open circuit.
  3. Into 100 ohms differential termination.
  4. Loss Of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.







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