SFF-8431_SFP+SPEC.pdf

SFP+

10G

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Published SFF-8431, Revision 4.1

SFP+ (Enhanced 10 Gbps pluggable module)

SFF Committee documentation may be purchased in hard copy or electronic form.

SFF specifications are available at ftp://ftp.seagate.com/sff

SFF Committee

SFF-8431 Specifications for

Enhanced Small Form Factor Pluggable Module SFP+

Revision 4.1

6th of July 2009

Secretariat: SFF Committee

Abstract: This document defines the low speed electrical and management interface specifications for enhanced Small Form

Factor Pluggable (SFP+) modules and hosts. The SFP+ module is a hot pluggable small footprint serial-to-serial data-agnostic

optical transceiver. This document defines the high speed electrical interface specifications for 10 Gigabit/s SFP+ modules

and hosts. The 8.5 Gigabit/s high speed electrical interface specifications are defined in FC-PI-4. The modules may optionally

support lower signalling rates as well. The modules may be used to implement single-mode or multimode serial optical inter-

faces at 850 nm, 1310 nm, or 1550 nm. The SFP+ module design may use one of several different optical connectors.

This specification provides a common reference for system manufacturers, system integrators, and suppliers. This is an inter-

nal working specification of the SFF Committee, an industry ad hoc group.

This specification is made available for public review, and written comments are solicited from readers. Comments received

by the members will be considered for inclusion in future revisions of this specification.

Support: This specification is supported by the identified member companies of the SFF Committee.

POINTS OF CONTACT:

Technical Editor: Chairman SFF Committee

Ali Ghiasi I. Dal Allan

Broadcom Corporation ENDL

3151 Zanker Road 14426 Black Walnut Court

San Jose, CA 95134 Saratoga, CA 95070

Voice: (408) 922-7423 Voice: (408) 867-6630

EMail: aghiasi@broadcom.com EMail: endlcom@acm.org

SSWG Leader:

Tom Lindsay

ClariPhy Communications

16 Technology Drive, Suite 165

Irvine, CA 92618

Voice: (425)608-0209

EMail: tom.lindsay@clariphy.com

Published SFF-8431, Revision 4.1

SFP+ (Enhanced 10 Gbps Pluggable Module)) Page iii

Foreword

The development work on this specification was done by the SFF Committee, an industry group. The membership of the

committee since its formation in August 1990 has included a mix of companies which are leaders across the industry.

When 2 1/2” diameter disk drives were introduced, there was no commonality on external dimensions e.g. physical size,

mounting locations, connector type, connector location, between vendors.

The first use of these disk drives was in specific applications such as laptop portable computers and system integrators

worked individually with vendors to develop the packaging. The result was wide diversity, and incompatibility.

The problems faced by integrators, device suppliers, and component suppliers led to the formation of the SFF Committee as

an industry ad hoc group to address the marketing and engineering considerations of the emerging new technology.

During the development of the form factor definitions, other activities were suggested because participants in the SFF Com-

mittee faced more problems than the physical form factors of disk drives. In November 1992, the charter was expanded to

address any issues of general interest and concern to the storage industry. The SFF Committee became a forum for resolving

industry issues that are either not addressed by the standards process or need an immediate solution.

Those companies which have agreed to support a specification are identified in the first pages of each SFF Specification.

Industry consensus is not an essential requirement to publish an SFF Specification because it is recognized that in an emerg-

ing product area, there is room for more than one approach. By making the documentation on competing proposals avail-

able, an integrator can examine the alternatives available and select the product that is felt to be most suitable.

SFF Committee meetings are held during T10 weeks (see www.t10.org), and Specific Subject Working Groups are held at the

convenience of the participants. Material presented at SFF Committee meetings becomes public domain, and there are no

restrictions on the open mailing of material presented at committee meetings.

Most of the specifications developed by the SFF Committee have either been incorporated into standards or adopted as

standards by EIA (Electronic Industries Association), ANSI (American National Standards Institute) and IEC (International Elec-

trotechnical Commission).

The SFF Committee activities support the requirements of the storage industry, and it is involved with several standards.

If you are interested in participating or wish to follow the activities of the SFF Committee, the signup for membership and/or

documentation can be found at:

www.sffcommittee.com/ie/join.html

The complete list of SFF Specifications which have been completed or are currently being worked on by the SFF Committee

can be found at:

ftp://ftp.seagate.com/sff/SFF-8000.TXT

If you wish to know more about the SFF Committee, the principles which guide the activities can be found at:

ftp://ftp.seagate.com/sff/SFF-8032.TXT

Suggestions for improvement of this specification will be welcome. They should be sent to the SFF Committee, 14426 Black

Walnut Ct, Saratoga, CA 95070.

Published SFF-8431, Revision 4.1

SFP+ (Enhanced 10 Gbps Pluggable Module)) Page iv

Industry Documents

The following interface standards are relevant to SFP+ Specifications.

SFF-8432 - Improved Pluggable Formfactor (ftp://ftp.seagate.com/sff/)

SFF-8083 - Improved 0.8mm Card Edge Connector (ftp://ftp.seagate.com/sff/)

SFF-8089 - SFP Rate and Application codes (ftp://ftp.seagate.com/sff/)

SFF-8079 - SFP Rate and Application Selection (ftp://ftp.seagate.com/sff/)

SFF-8472 - Diagnostic Monitoring Interface for Optical Transceivers (ftp://ftp.seagate.com/sff/)

INF-8074i - SFP (Small Form Factor) Transceiver (ftp://ftp.seagate.com/sff/)

INF-8077i - 10 Gigabit Small Form Factor Pluggable Module (XFP MSA) (ftp://ftp.seagate.com/sff/)

FC-PI-4 - Fibre Channel - Physical Interface-4

10GFC - Fibre Channel - 10 Gigabit

FC-MJSQ - Methodologies for Jitter and Signal Quality Specifications FC INCITS Project 1316-DT Rev 14.1, June 5, 2005

IEEE 802.3 - IEEE Standard 802.3, Relevant 10 Gigabit Ethernet clauses are 49, 10GBASE-R LAN PHY; 50, 10GBASE-W WAN PHY;

52, 10 Gigabit Ethernet serial PMDs; and 68, 10GBASE-LRM)

OIF CEI - Optical Internetworking Forum - Implementation Agreement # OIF-CEI-02.0 Common Electrical I/O (CEI)

(http://www.oiforum.com/public/impagreements.html)

Acronyms and other abbreviations

64B/66B Data encoded with 64B/66B encoder as defined by the IEEE Std. 802.3 CL 49.

BER bit error ratio

CDR clock and data recovery

CRU clock recovery unit

decibel. 10*log10(ratio of power quantities). Powers can be electrical or optical. Conventional usage. See also dBe and

dBo.

dBe

Specific case of dB where signals are electrical. 10*log10(ratio of electrical power quantities). 20*log10(ratio of voltage

quantities) can be used if reference impedances are equal.

dBm decibel (relative to 1 mW)

dBo

Specific case of dB where the signals are in optical power. 10*log10(ratio of optical power quantities). Also, in certain

cases with electrical signals relating to linear optical modules, where it is expected that electrical voltage is in proportion

to optical power, 10*log10(ratio of voltage quantities).

DCD Duty cycle distortion

DDPWS Data Dependent Pulse Width Shrinkage

DDJ Data Dependent Jitter

dRN Difference of Relative noise see Appendix D

DUT device under test

dWDP Difference of the waveform distortion penalty of an optical receiver

dWDPc Difference of the waveform distortion penalty of an electrical cable assembly

EMC electromagnetic compatibility

EMI electromagnetic Interference

FC Fibre Channel

h hexadecimal notation

HCB Host Compliance Board

IEEE Institute of Electrical and Electronics Engineers

ITU-T ITU Telecommunication Standardization Sector

Gbit

gigabit = 10

bits

GBd Gigabaud

J2 99% Jitter

LRM

IEEE 802.3 CL68 Physical Layer Specifications for 10Gb/s using 10GBASE-R encoding and long wavelength optics for

multimode fiber

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