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Information Speciﬁcation INF-8077i, Revision 4.5

XFP (10 Gbit pluggable module) SFF Page i

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

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

SFF Committee

INF-8077i

10 Gigabit Small Form Factor Pluggable Module

Revision 4.5 August 31, 2005

Secretariat: SFF Committee

Abstract: This speciﬁcation deﬁnes the electrical, management, and mechanical interfaces of the XFP module. The

module is a hot pluggable small footprint serial-to-serial data-agnostic multirate optical transceiver, intended to

support Telecom (SONET OC-192 and G.709 “OTU-2”) and Datacom applications (10 Gb/s Ethernet and 10 Gb/s

Fibre Channel). Nominal data rates range from 9.95 Gb/s, 10.31 Gb/s, 10.52 Gb/s, 10.70 Gb/s, and the emerging

11.09 Gb/s. The modules support all data encodings for these technologies. The modules may be used to imple-

ment single mode or multi-mode serial optical interfaces at 850 nm, 1310 nm, or 1550 nm. The XFP module design

may use one of several different optical connectors. An adaptable heatsink option allows a single module design to

be compatible with a variety of hosts.

Support: This document was adopted by the XFP MSA and is provided to the SFF for distribution and as a source

document for related SFF projects.

Documentation: This document has been prepared according to the guidelines and agreements of the XFP MSA.

The XFP MSA has the stated intention of encouraging broad and rapid industry adoption of the speciﬁcation. The

XFP speciﬁcation and the technologies it uses may be offered to formal standards bodies to further support the

adoption of the speciﬁcation.

POINTS OF CONTACT:

Technical Editor: XFP Chair:

Ali Ghiasi Robert Snively

Broadcom Corporation Brocade Communication Systems, Inc.

3151 Zanker Road 1745 Technology Drive

San Jose, CA 95134 San Jose, CA 95110

Voice: (408) 922-7423 Voice: (408) 487-8135

EMail: [email protected] EMail: rsnively@brocade.com

SFF Chair

I. Dal Allan

14426 Black Walnut Court

Saratoga, CA 95070

Voice: (408) 867-6630

Fax: (408) 867-2115

Email: [email protected]

Information Speciﬁcation INF-8077i, Revision 4.5

XFP (10 Gbit pluggable module) SFF Page ii

EXPRESSION OF SUPPORT BY MANUFACTURERS

The SFF Committee does not require expressions of support for documents accepted as informational.

The user's attention is called to the statements of intellectual property rights and copyright in the XFP speciﬁcation,

page ii. By distribution of this Speciﬁcation, no position is taken with respect to the validity of these statements or of

any patent rights in connection therewith. The XFP adopter’s agreement, available from XFP Promoters, contains

agreements with respect to intellectual property rights and other rights and responsibilities.

SFF Committee information

If you are not a member of the SFF Committee, but you are interested in participating, the following principles have

been reprinted here for your information.

PRINCIPLES OF THE SFF COMMITTEE

The SFF Committee is an ad hoc group formed to address storage industry needs in a prompt manner. When

formed in 1990, the original goals were limited to deﬁning de facto mechanical envelopes within which disk drives

can be developed to ﬁt compact computer and other small products.

In November 1992, the SFF Committee objectives were broadened to encompass other areas which needed simi-

lar attention, such as pinouts for interface applications, and form factor issues on larger disk drives. SFF is a forum

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

Documents created by the SFF Committee are expected to be submitted to bodies such as EIA (Electronic Indus-

tries Association) or an ANSI Accredited Standards Committee. They may be accepted for separate standards, or

incorporated into other standards activities.

The principles of operation for the SFF Committee are not unlike those of an accredited standards committee.

There are 3 levels of participation:

- Attending the meetings is open to all, but taking part in discussions is limited to member companies, or

those invited by member companies

- The minutes and copies of material which are discussed during meetings are distributed only to those who

- The individuals who represent member companies of the SFF Committee receive documentation and vote

on issues that arise. Votes are not taken during meetings, only guidance on directions. All voting is by letter

ballot, which ensures all members an equal opportunity to be heard.

Material presented at SFF Committee meetings becomes public domain. There are no restrictions on the open

mailing of material presented at committee meetings. In order to reduce disagreements and misunderstandings,

copies must be provided for all agenda items that are discussed. Copies of the material presented, or revisions if

completed in time, are included in the documentation mailings.

The sites for SFF Committee meetings rotate based on which member companies volunteer to host the meetings.

Meetings have typically been held during the INCITS T10 weeks. The meetings of the SFF Special Subject Work-

ing Group on Transceivers have typically been held during INCITS T11 weeks.

The funds received from the annual membership fees are placed in escrow, and are used to reimburse ENDL for

the services to manage the SFF Committee.

Information Speciﬁcation INF-8077i, Revision 4.5

XFP (10 Gbit pluggable module) SFF Page iv

Foreword for SFF documents

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 in which space

was at a premium and time to market with the latest machine was an important factor. System integrators worked

individually with vendors to develop the packaging. The result was wide diversity, and with space being such a

major consideration in packaging, it was not possible to replace one vendor's drive with a competitive product.

The desire to reduce disk drive sizes to even smaller dimensions such as 1.8" and 1.3" made it likely that devices

would become even more constrained in dimensions because of a possibility that such small devices could be

inserted into a socket, not unlike the method of retaining semiconductor devices.

The problems faced by integrators, device suppliers, and component suppliers led to the formation of an industry

ad hoc group to address the marketing and engineering considerations of the emerging new technology in disk

drives. After two informal gatherings on the subject in the summer of 1990, the SFF Committee held its ﬁrst meet-

ing in August.

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

SFF Committee faced problems other than the physical form factors of disk drives. In November 1992, the mem-

bers approved an expansion in charter to address any issues of general interest and concern to the storage indus-

try. The SFF Committee became a forum for resolving industry issues that are either not addressed by the

standards process or need an immediate solution.

At the same time, the principle was adopted of restricting the scope of an SFF project to a narrow area, so that the

majority of documents would be small and the projects could be completed in a rapid timeframe. If proposals are

made by a number of contributors, the participating members select the best concepts and uses them to develop

speciﬁcations which address speciﬁc issues in emerging storage markets.

Those companies which have agreed to support a documented 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 emerging product area, there is room for more than one approach. By making the documen-

tation on competing proposals available, an integrator can examine the alternatives available and select the prod-

uct that is felt to be most suitable.

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

Black Walnut Ct, Saratoga, CA 95070. The suggestions should additionally be sent to the XFP Chair and Technical

Editor.

The development work on this speciﬁcation was done by the XFP Group, an industry MSA.

Information Speciﬁcation INF-8077i, Revision 4.5

XFP (10 Gbit pluggable module) SFF Page v

SFF Speciﬁcations

There are several projects active within the SFF Committee. At the date of printing, document numbers had been

assigned to the following projects. The status of Speciﬁcations is dependent on committee activities.

F = Forwarded The document has been approved by the members for forwarding to a formal standards

body.

P = Published The document has been balloted by members and is available as a published SFF Speci-

ﬁcation.

A = Approved The document has been approved by ballot of the members and is in preparation as an

SFF Speciﬁcation.

C = Canceled The project was canceled, and no Speciﬁcation was Published.

D = Development The document is under development at SFF.

E = Expired The document has been published as an SFF Speciﬁcation, and the members voted

against re-publishing it when it came up for annual review.

e = electronic Used as a sufﬁx to indicate an SFF Speciﬁcation which has Expired but is still available in

electronic form from SFF e.g. a speciﬁcation has been incorporated into a draft or pub-

lished standard which is only available in hard copy.

i = Information The document has no SFF project activity in progress, but it deﬁnes features in developing

industry standards. The document was provided by a company, editor of an accredited

standard in development, or an individual. It is provided for broad review (comments to the

author are encouraged).

s = submitted The document is a proposal to the members for consideration to become an SFF Speciﬁcation.

Spec # Rev List of Speciﬁcations as of March 3, 2003

SFF-8000 SFF Committee Information

INF-8001i E 44-pin ATA (AT Attachment) Pinouts for SFF Drives

INF-8002i E 68-pin ATA (AT Attachment) for SFF Drives

SFF-8003 E SCSI Pinouts for SFF Drives

SFF-8004 E Small Form Factor 2.5" Drives

SFF-8005 E Small Form Factor 1.8" Drives

SFF-8006 E Small Form Factor 1.3" Drives

SFF-8007 E 2mm Connector Alternatives

SFF-8008 E 68-pin Embedded Interface for SFF Drives

SFF-8009 4.1 Unitized Connector for Cabled Drives

SFF-8010 E Small Form Factor 15mm 1.8" Drives

INF-8011i E ATA Timing Extensions for Local Bus

SFF-8012 3.0 4-Pin Power Connector Dimensions

SFF-8013 E ATA Download Microcode Command

SFF-8014 C Unitized Connector for Rack Mounted Drives

SFF-8015 E SCA Connector for Rack Mounted SFF SCSI Drives

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