40G QSFP+ transceiver

40G QSFP+ transceiver

QSFP+ SR fiber module

  • Description
  • Inquiry

40Gb/s 100m QSFP+ transceiver  SR4



l High Channel Capacity: 40 Gbps per module

l Up to 11.1Gbps Data rate per channel

l Maximum link length of 100m links on OM3 multimode fiber


Or 150m on OM4 multimode fiber

l High Reliability 850nm VCSEL technology

l Electrically hot-pluggable

l Compliant with QSFP+ MSA

l Case operating temperature range:0°C to 70°C

l Power dissipation < 1.5 W



l 40G Ethernet

l Infiniband QDR

l Fiber channel




l Compliant to IEEE 802.3ba

l Compliant to SFF-8436

l RoHS Compliant.


General Description

FastFOM QSFP+SR4 QSFP+ transceiver are designed for use in 40 Gigabit per second links over multimode fiber. They are compliant with the QSFP+ MSA and IEEE 802.3ba 40GBASE-SR4.The optical transmitter portion of the transceiver incorporates a 4-channel VCSEL (Vertical Cavity Surface Emitting Laser) array, a 4-channel input buffer and laser driver, control and bias blocks. The QSFP+ transceiver optical receiver portion of the transceiver incorporates a 4-channel PIN photodiode array, a 4-channel TIA array, a 4 channel output buffer, control blocks.

Absolute Maximum Ratings

Storage TemperatureTs-4085ºC
Storage Ambient HumidityHA595%
Operating Relative HumidityRH85%
Power Supply VoltageVCC-0.34V
Signal Input VoltageVcc-0.3Vcc+0.3V
Damage threshold3.4dBm

Recommended Operating Conditions

Case Operating TemperatureTcase070ºCWithout air flow
Power Supply VoltageVCC3.143.33.47V
Power Supply CurrentICC350mA
Data RateBR10.3125GbpsEach channel
Transmission DistanceTD100mOM3 MMF
150mOM4 MMF

Optical Characteristics





Center Wavelengthλ0840860nm
Average Launch Power each lane-7.6-1dBm
Spectral Width (RMS)σ0.65nm
Optical Extinction RatioER3dB
Average launch Power off each lanePoff-30dBm
Transmitter and Dispersion Penalty each laneTDP3.5dB
Optical Return Loss ToleranceORL12dB
Output Eye MaskCompliant with IEEE 802.3ba
Receiver WavelengthΛin840860nm
Rx Sensitivity per laneRSENS-9.5dBm1
Input Saturation Power (Overload)Psat2.4dBm
Receiver ReflectanceRr-12dB
LOS De-AssertLOSD-12dBm
LOS AssertLOSA-30dBm
LOS Hysteresis0.5dBm


  1. Measured with a PRBS 231-1 test pattern, @10.325Gb/s, BER<10-12 .


  1. Electrical Characteristics
Parameter  Symbol  Min  Typ  Max  Unit  NOTE
 Supply Voltage Vcc 3.14 3.3 3.46 V
 Supply Current Icc 350 mA
 Input differential impedance Rin 100 Ω 1
  Differential data input swing Vin,pp 180 1000 mV
 Single ended input voltage tolerance VinT -0.3 4.0 V
 Differential data output swing Vout,pp 300 850 mV 2
 Single-ended output voltage -0.3 4.0 V


  1. Connected directly to TX data input pins. AC coupled thereafter.
  2. Into 100 ohms differential termination.

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