microQSFP module specification Version 2.0 now available

The microQSFP (micro Quad Small Form-Factor Pluggable) Multi-Source Agreement (MSA) Group has released Version 2.0 of the module specification. The specifications describe a module form factor smaller than QSFP28 for 100-Gbps applications, including optical transceivers and copper cable assemblies, and come shortly after the January release of the initial version of the document (see "microQSFP MSA offers first datacom optical transceiver specifications").

The microQSFP specification document includes final electrical, mechanical, thermal, and management specifications of the microQSFP module and cage. The module is expected to approximate the width of current 10-Gbps SFP devices.

The microQSFP transceiver module uses a compact connector system that accommodates four input/output (I/O) electrical channels. The connector will support direct attach copper cable assemblies, optical modules, and active optical cable assemblies.

The form factor can be used to support transmission with one, two, or four channels while offering enhanced thermal features. Thus, a microQSFP device could be used for one- or two-channel applications where higher thermal loads are required, such as 1x50 or 2x50 Gbps applications.

The microQSFP connector meets the requirements of 28-Gbps channels and it is intended to support 50-Gbps PAM4 requirements as well. The group expects the development of other microQSFP connectors that will support even higher data rates. The MSA members believe the small width of the device will support 1RU line card designs with 72 ports. At 25 Gbps per channel, such a line card would have a total capacity of 7.2 Tbps.

The founding promoter members of the MSA include Broadcom, Brocade, Cisco, Dell, Foxconn Interconnect Technology, Huawei, Intel, Juniper Networks, Lumentum, Microsoft, Molex and TE Connectivity. Subsequent contributor members include Amphenol, Finisar, Lorom, MultiLane, Oclaro, Rosenberger, and Semtech. The MSA group welcomes additional new contributory members. Information about the specification as well as the MSA group can be found at www.microQSFP-MSA.com.

"The microQSFP provides the opportunity today for the smallest single-port form factor for 100-Gbps Ethernet applications and is expected soon for 200-Gbps Ethernet applications," said Jeffery J. Maki, distinguished engineer, Juniper Networks. "We are pleased to be a part of a working group committed to advancing the industry standard for next-generation data communications."

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