SFP & SFP+

MSA Reference	Revision	Type	Title	Download
INF-8074i	1.0	Form factor	SFP (Small Formfactor Pluggable) Transceiver
SFF-8431	4.1	Form factor	SFP+ 10Gb/s and Low Speed Electrical Interface
SFF-8432	5.1	Form factor	SFP+ Module and Cage
SFF-8472	12.2	Management	Diagnostic Monitoring Interface for Optical Transceivers
SFF-8079	1.7	Management	SFP Rate and Application Select
SFF-8089	1.3	Management	SFP Rate and Application Select
SFF-8690	1.4	Management	Tunable SFP+ Memory Map for ITU Frequencies
SFF-8024	4.2	Management	SFF Cross Reference to Industry Products

XFP

MSA Reference	Revision	Type	Title	Download
INF-8077i	4.5	Form factor & Management	10 Gigabit Small Form Factor Pluggable Module
SFF-8477	1.4	Management	Tunable XFP for ITU Frequency Grid Applications

X2

MSA Reference	Revision	Type	Title	Download
X2 MSA	2.0	Form Factor & Management	X2 MSA

CFP, CFP2, CFP4 and CFP8

MSA Reference	Revision	Type	Title	Download
CFP MSA	1.4	Form Factor	CFP MSA Hardware Description
CFP MSA	1.0	Form Factor	CFP2 Hardware Specification
CFP MSA	1.1	Form Factor	CFP4 Hardware Specification
CFP MSA	1.0	Form Factor	CFP8 Hardware Specification
CFP MSA	2.6	Management	Management Interface Specification

QSFP+, QSFP28 and QSFP-DD

MSA Reference	Revision	Type	Title	Download
SFF-8436	4.8	Form Factor & Management	QSFP+ 10 Gbs 4x Pluggable Transceiver
SFF-8665	1.9	Form Factor	QSFP+ 28 Gb/s 4x Pluggabler Transceiver Solution
SFF-8636	2.9	Management	Management Interface for Cables Environments