SFP-DD MSA releases updated 4.1 hardware specification

Created August 20, 2020
Technologies and Products

The Small Form Factor Pluggable Double Density (SFP-DD) Multi-Source Agreement (MSA) Group has released its updated 4.1 hardware specification and drawings for the SFP-DD pluggable interface designed to enable high-speed 100+ Gbps, high-density networking equipment. The SFP-DD form factor uses 2-lane pluggable modules, is backward compatible with SFP+ and offers improved host to module management communication based on a Two-Wire-Interface (TWI).

SFP-DD revision 4.1 hardware specification includes added features to support ResetL, dual function IntL/TXFaultDD and ePPS. Newly added timing tables will also allow for low speeds 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 colour coding moved out of Mechanical and Board Definition chapter 5 and into a new chapter 5. Lastly, 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 updated specification supersedes previous versions and has updated mechanical connector dimensions. Users should note that the connector dimensions specified in the 4.1 supersede all previous versions.

SFP-DD MSA promoters include Alibaba, Broadcom, Cisco, Dell EMC, HPE, Huawei, II-VI Incorporated, Intel, Juniper Networks, Lumentum, Molex, Nvidia and TE Connectivity. Contributors include Accelink, Amphenol, AOI, Eoptolink, FIT, Fourte, Genesis, Hisense, Infinera, Innolight, Maxim Integrated, Multilane, Nokia, Oclaro, Senko, Source Photonics, US Conec and ZTE.

For more information, visit www.sfp-dd.com.

sfp-dd-msa-releases-updated-4-1-hardware-specification

This article was written
by Peter Dykes

Peter Dykes is a independent telecoms and technology journalist who has over that last 30 years written for a wide range of B2B publications and companies. A former BT engineer, he specialises in networks and associated support systems. He is currently Editor of Optical Connections.