• SFP-DD MSA SFP-DD/SFP-DD112 Hardware Specification for SFP DOUBLE DENSITY PLUGGABLE TRANSCEIVER Revision 5.2

Our Features

File server interconnect today is often an underpopulated zQSFP interface, using 2 of the potential 4 lanes to provide 100 Gb/s capability

SFP-DD will offer backwards compatibility to all current SFP style interfaces

Cable assembly:

  • SFP-DD and QSFP-DD naturally yield break out cables, 400 Gb/s to 4 100 Gb/s lanes
  • Support 200 Gb/s to 50 Gb/s if required
  • Max Twin-ax Gauge – 28 AWG for breakout cable at this time.
  • Target 3m 28 AWG Twin Ax cable assembly

SMT connector and 1X1 cage

Targeting support up to 3.5w optical modules in an enterprise environment

SFP-DD electrical interfaces will employ 2 lanes that operate up to 25 Gbps NRZ modulation or 56 Gbps PAM4 modulation, providing solutions up to 50 Gbps or 112 Gbps PAM4 aggregate

Benefits

  • Concept leverages QSFP-DD SMT, excellent SI.
  • Reduced board real estate and panel beach front as compared to zQSFP
  • Mates existing SFP+ cables, modules and AOC’s as well as new SFP-DD interfaces
  • Potential to provide 2 additional lanes for future proof bandwidth upgrades – need to confirm based on pin out
  • SFP-DD efficiently supports 4 port breakouts (2 lanes per port) from QSFP-DD
  • In general, SFP-DD is a natural complement to QSFP-DD interfaces
PROMOTORS
Alibaba Broadcom
Dell HPE
CONTRIBUTORS
ACELINK
ACELINK
Amphenol
AOI
Eoptolink
Fit
Forte
Hisense
Infinera Light
Inno Light
Maxim
MultiLane
Nokia
Oclaro
Senko
SPSource
US Conec
ZTE

Summary

The SFP-DD MSA Group is addressing the technical challenges of achieving a double-density interface and ensuring mechanical interoperability for module components produced by different manufacturers, while maintaining excellent SI and supporting up to 3.5w for optical modules in an enterprise environment

Collaboration through the MSA will enable faster implementation and easier operation of the SFP-DD pluggable interface in networking equipment