OSFP-400G-2FR4 Compatible 400G OSFP 2x FR4 PAM4 Dual CS 2km SMF FEC Transceiver Module

Compatible :

OSFP-400G-2FR4 Compatible 2x 200G OSFP FR4 PAM4 CWDM4 Dual CS 2km SMF FEC Optical Transceiver Module

The OSFP 400G 2xFR4 module is a highly integrated 2x200G transceiver focused on reach, bandwidth, density and cost for datacenter deployments. The module has 8 independent electrical input/output channels operating at 53.125Gb/s per channel. Optically the module consists of two transmit/receive units, with each operating on a set of 4 wavelengths on the ITU G.694.2 CWDM grid near 1300nm. The transmit path of the module incorporates a bi-directional PAM4 retimer ASIC integrated with an 8-channel modulator driver, 8 externally modulated lasers (two on each CWDM channel) and two optical multiplexers. On the receive path, two optical demultiplexers are coupled to 8 photodiodes and two 4-channel TIA arrays, along with the PAM4 retimer. The electrical interface of the module is compliant with the 400GAUI-8 interface as defined by IEEE 802.3bs.


  • 2km reach via single mode fiber with KP4 FEC support at the host (BERthreshold = 2e-4)
  • Optical link budget of 7.0dB to support fiber patch panel and fiber cable management
  • Triple rate operation: 53.125Gb/s (PAM4), 25.78125Gb/s (NRZ), and 10.3125Gb/s (NRZ) per channel
  • Soft FEC support (SFEC) for 1.5dB gain with 5% overhead included in PAM4 ASIC
  • Uncooled CWDM externally modulated lasers
  • Compliant with 400GAUI-8 interface defined in IEEE 802.3bs
  • Dual SMF mini-LC duplex optical connectors (5.25mm pitch)
  • Receiver monitoring: receiver signal strength indicator (RSSI) is required for link diagnostics
  • Transmitter output power monitoring (TOPM) for laser calibration and link diagnostics
  • DC blocking caps on high-speed inputs and outputs
  • Hot pluggable for ease of installation and service

Product Specifications

Arista Networks Compatible OSFP-400G-2FR4 Vendor Name LightOptics
Form Factor OSFP Max Data Rate 425Gbps
Wavelength 1271nm, 1291nm, 1311nm, 1331nm Max Distance 2km
Modulation Format PAM4 Host Required FEC
Connector Duplex CS Voltage Supply 3.3V
Cable Type SMF DDM Support Yes
Transmitter Type 2x CWDM4 EML Receiver Type PIN
TX Power -4.2~+4.7dBm Receiver Sensitivity < -6.0dBm
Operation Temperature 0 to 70°C (32 to 158°F) Maximum Power < 12.0W
Protocols OSFP MSA, IEEE 802.3bs Application 400G Ethernet, Data Center Interconnect, Infiniband Interconnects, Enterprise Networking

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  • FedEx Estimated 3-6 business days
  • DHL Estimated 3-6 business days
  • UPS Estimated 3-6 business days

Extended 30-day, no-questions-asked Return Policy

We have a 30-day, no-questions-asked return policy for all of our products. If you aren’t satisfied, please contact our team within 30 days of receipt for a refund or replacement. To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original and unopened packaging. To initiate a return please contact our customer success team who will issue an RMA number and provide return shipping instructions.

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OSFP-400G-2FR4 Compatible 400G OSFP 2x FR4 PAM4 Dual CS 2km SMF FEC Transceiver Module
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