Standard and Extended Temperature (-40 to +90C) 1.5 µm Cooled EML XMD MSA TOSA, 80km, TDM & DWDM, extra-low PTEC for SFP+

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The Broadcom 1656 Series 80km XMD MSA compatible 10 Gb/s transmitter optical subassembly (TOSA) integrates a high-speed electroabsorptive (EML) laser, a monitor photodiode and a micro-TEC in a small form-factor metallized ceramic package. It is designed for use in small form-factor pluggable (XFP) transceivers and other types of optical modules for high-speed telecommunication and data applications including WDM SONET OC-192, SDH STM-64 and 10 Gibabit Ethernet.

1656 is an evolution of Broadcom’s highly successful 1626 series 10G TOSA, which further reduces power dissipation to enable applications using SFP+ and other transceiver form factors.


  • Ultra small form factor 8-pin XMD MSA TOSA
  • Supports data rates up to 11.3Gb/s
  • For use up to 80km (1600 ps/nm) at 10 Gb/s
  • Up to +2 dBm typical optical output power
  • Wavelength selectable to ITU-T standards covering the full C-band with extended channels
  • Suitable for use in 100GHz channel spacing in DWDM systems
  • Very low TEC power consumption
  • LC receptacle, with standard and short flex options
  • 50 Ohm Single-ended data input
  • Standard (-5 to +75C) and Extended (-40 to +90C) case operating temperature range options


  • SFP+ Transceivers
  • XFP Transceivers
  • Line cards

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory No
Form Factor XMD MSA
Connector Type LC receptacle
Fiber Type Single Mode
Maximum Distance (km) 80
Nominal Optical Wavelength (nm) 1550
Emitter EML
RoHS6 Compliant Y
Data Rate 10 Gb/s