Skip to content

Chelsio SM25G-SR Compatible 25GBASE-SR SFP28 850nm 100m MMF LC DOM Optical Transceiver Module


Chelsio SM25G-SR compatible optical transceiver is a dual fiber 25.8Gbps Small Form-factor Pluggable SFP28 module for use in 25GBASE Ethernet. SFP28 SR provides 25Gb/s throughput up to 100 meters over OM4 or 70 meters over OM3 multi-mode fiber (MMF) with host FEC using 850nm wavelength. This transceiver is fully compliant with SFP28 Multi-Source Agreement (MSA), IEEE 802.3by 25GBASE-SR and 25GAUI standard. Its electrical interface is MSA compliant 20-pin edge type connector and the optical interface is Duplex LC connector. The full-duplex SFP28 transceiver features highly reliable VCSEL transmitter and PIN photo detector to offer high performance interconnection at 25 Gbps data rate. Built-in Digital Diagnostic Monitoring (DDM) support is present for real-time performance monitoring via 2-wire Interface (TWI/I2C). Our modules are factory pre-programmed for compatibility, perform identically to original Chelsio SM25G-SR transceivers.


Feature

  • Equivalent to Chelsio SM25G-SR in function
  • Hot pluggable SFP28 form factor
  • Data rate up to 25.8Gbps
  • 850nm VCSEL transmitter
  • PIN photo receiver
  • Duplex LC optical connector
  • Link distances up to OM4 100m, OM3 70m with host FEC
  • Internal CDR on both Transmitter and Receiver channels
  • Built-in digital diagnostic via 2-wire interface
  • Single 3.3V power supply voltage
  • Power consumption < 1W
  • Ambient temperature range 0 to 70°C for commercial application
  • Compliant with SFF-8402, SFF-8432, SFF-8419, SFF-8472
  • Compliant with IEEE 802.3by 25GBASE-SR
  • Compliant with RoHS, REACH, CE, FCC standards

Application

  • 25G Ethernet
  • eCPRI Wireless Networks
  • Data Center
  • Enterprise
  • Campus

Specification

Chelsio Compatible P/N SM25G-SR Form Factor SFP28
Max Data Rate 25.8Gbps Max Distance 100m (328ft) @OM4, 70m (230ft) @OM3
Wavelength 850nm Connector Duplex LC
DDM/DOM Support Media MMF
Transmitter Type VCSEL Receiver Type PIN
Transmitter Power -5 to 2.4dBm Receiver Sensitivity < -10.3dBm
Extinction Ratio 2dB Receiver Overload 2.4dBm
Transmit and Dispersion Penalty 3dB Power Budget 5.3dB
OE Packaging Coaxial Packaging Signal Conditioner Retimer for TX and RX
Modulation Format NRZ Host FEC Support
Power Consumption 1W Commercial Temperature Range 0 to 70°C (32 to 158°F)