SFP-DD MSA group releases updated 4.1 hardware specification

The Small Form Factor Pluggable Double Density (SFP-DD) Multi-Source Agreement (MSA) Group announced its updated 4.1 hardware specification and drawings for the SFP-DD pluggable interface. The SFP-DD form factor, designed to enable high-speed 100+ Gbps high-density networking equipment, enables two-lane pluggable modules, is backward compatible with SFP+, and offers improved host-to-module management communication based on a two-wire interface, according to the group.

The 4.1 revision includes added features to support Reset1, dual function IntL/TSfaultDD and ePPS. New added timing tables will accommodate low-speed signals, soft control, and module status. The former Chapter 7 (Management Interface) is now part of Chapter 4 (Electrical Specification). The updated hardware specification includes port mapping, optical connectors, and module color coding moved out of Chapter 5 (Mechanical and Board Definition) into a new Chapter 5. Finally, TS-1000 Normative Module and Connector performance requirements were added as Appendix A.

Targeting support of optical modules up to 3.5 W, the SFP-DD form factor addresses the technical challenges of achieving a double-density interface and ensuring mechanical interoperability for module components produced by different manufacturers while still enabling the use of legacy SFP modules. This most recent specification supersedes all previous versions and has updated mechanical connector dimensions.

To download the SFP-DD updated hardware specification and drawings or to explore opportunities for becoming a contributing member, visit www.sfp-dd.com.

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