DSFP Module Specification Rev. 1.0
© DSFP MSA Page 6 September 12, 2018
1 Scope
The DSFP specification defines:
• The DSFP defines Dual Small Form Factor pluggable mechanical form factor;
• Latching mechanism compatible with SFP+;
• Host cage together with the mating connector;
• Electrical interface, including pin-out, data, control, power and ground signals;
• Mechanical interface, including package outline, front panel and printed circuit board
(PCB) layout requirements;
• Thermal requirements and limitations, including heat sink design and airflow;
• Electrostatic discharge (ESD) requirements;
• DSFP electrical and mechanical interfaces will support 112G in future;
• The DSFP MIS is an abridged version of CMIS.
2 References
- IEC 61754-7-1:2014: Fibre optic interconnecting devices and passive components -
Fibre optic connector interfaces - Part 701: Type MPO connector family – One fibre row.
- IEC 61754-20:2012: Fibre optic interconnecting devices and passive components - Fibre
optic connector interfaces - Part 20: Type LC connector family.
- CMIS (Common Management Interface Specifications), see http://www.qsfp-dd.com.
- UM10204, I
2
C-bus specification and user manual, Rev 6 – 4 April 2014.
- EN61000-4-2:2008: Electromagnetic compatibility (EMC)- Part 4-2: Testing and
measurement techniques - Electrostatic discharge immunity test.
- ANSI/ESDA/JEDEC JS-001-2014: Electrostatic Discharge Sensitivity Testing - Human
Body Model (HBM) - Component Level.
- IEEE 802.3cd: Media Access Control Parameters for 50 Gb/s and Physical Layers and
Management Parameters for 50 Gb/s, 100 Gb/s, and 200 Gb/s Operation.
- IEEE 802.3-2015: IEEE standard for Ethernet Clause 83, 91, 92, 108, 109, and 120 and
Annex 83E, 109A, 120C, and 120E.
- SFF-8024: Specification for SFF Cross Reference to Industry Products, Rev 4.1, June
27, 2016.
- SFF-8431 Specification for Enhanced Small Form Factor Pluggable Module SFP+, Rev
4.1, July 2009.
- SFF-8432 Specification for SFP+ Module and Cage, Rev 5.1, August 2012.
- INF-8074i SFP (Small Formfactor Pluggable) Transceiver, Rev 1.0, May 2001.
3 DSFP Application Reference Examples
Below sub-sections illustrate block diagrams for a sampling of optical physical medium
dependent sublayers (PMDs) that can be realized in a DSFP form factor. These block diagrams
are meant to serve as guidelines for better understanding of the form factor and are by no
means exhaustive.