SFF specifications are available at http://www.snia.org/sff/specifications
or ftp://ftp.seagate.com/sff
This specification was developed by the SFF Committee prior to it
becoming the SFF TA (Technology Affiliate) TWG (Technical Working
Group) of SNIA (Storage Networking Industry Association).
Chairman SFF TA TWG
Email: SFF-Chair@snia.org
The information below should be used instead of the equivalent herein.
POINTS OF CONTACT:
If you are interested in participating in the activities of the SFF TWG, the
membership application can be found at:
The complete list of SFF Specifications which have been completed or are currently
being worked on can be found at:
The operations which complement the SNIA's TWG Policies & Procedures to guide the SFF
TWG can be found at:
Suggestions for improvement of this specification will be welcome, they should be
submitted to:
http://www.snia.org/feedback
http://www.snia.org/sff/specifications/SFF-8000.TXT
http://www.snia.org/sff/specifications/SFF-8032.PDF
http://www.snia.org/sff/join
Published SFF-8643 Rev 3.5
SFF Committee documentation may be purchased in electronic form.
SFF specifications are available at ftp://ftp.seagate.com/sff
SFF Committee
SFF-8643 Specification
for
Mini Multilane 4/8X 12 Gb/s Unshielded Connector (HD12un)
Rev 3.5 September 22, 2014
Secretariat: SFF Committee
Abstract: This specification defines the general performance requirements for the
Mini Multilane connector, which is designed for use in high speed serial,
interconnect applications at multi-gigabit speeds. This connector is popularly
referred to as the Mini-SAS HD (High Density) Connector system.
This is the first generation of this connector.
This specification provides a common reference for systems manufacturers, system
integrators, and suppliers. This is an internal 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.
The description of a connector in this specification does not assure that the
specific component is actually available from connector suppliers. If such a
connector is supplied it must comply with this specification to achieve
interoperability between suppliers.
Support: This specification is supported by the identified member companies of the
SFF Committee.
POINTS OF CONTACT:
Jay Neer
Technical Editor
Molex
2222 Wellington Court
Lisle, Il 60532
Ph: 561-447-2907x555-3889
Email: jay_dot_neer_at_molex_dot_com
I. Dal Allan
Chairman SFF Committee
14426 Black Walnut Court
Saratoga, CA 95070
Ph: 408-867-6630
Email: endlcom_at_acm_dot_org
Mini Multilane 4/8X 12 Gb/s Unshielded Connector (HD12un) Page 1
Published SFF-8643 Rev 3.5
EXPRESSION OF SUPPORT BY MANUFACTURERS
The following member companies of the SFF Committee voted in favor of this industry
specification.
All Best
Amphenol
Avago
Cinch
Dell Computer
Emulex
FCI
GLGnet Electronics
Hewlett Packard
HGST
Jess-Link
LSI
Luxshare-ICT
Luxtera
Molex
NetApp
NetLogic uSyst
Panduit
Seagate
Shinning Electronics
TE Connectivity
Volex
Xyratex
The following member companies of the SFF Committee voted against this industry
specification.
Foxconn
The following member companies of the SFF Committee voted to abstain on this
industry specification.
AMI
Applied Micro
Broadcom
EMC
Finisar
JDS Uniphase
Mellanox
MGE
Oclaro
Pioneer
QLogic
Sandisk
Sumitomo
Toshiba
Western Digital
The user's attention is called to the possibility that implementation to this
Specification may require use of an invention covered by patent rights. By
distribution of this Specification, no position is taken with respect to the
Mini Multilane 4/8X 12 Gb/s Unshielded Connector (HD12un) Page 2
Published SFF-8643 Rev 3.5
validity of this claim or of any patent rights in connection therewith. Members of
the SFF Committee, which advise that a patent exists, are required to provide a
statement of willingness to grant a license under these rights on reasonable and
non-discriminatory terms and conditions to applicants desiring to obtain such a
license.
Change History:
Rev 2.1 November 5, 2010:
- Dimension designators changed to alpha order for Figures 6.2 through 6.8.
Rev 2.3 January 11, 2011
- Title changed to "Unshielded 8/4 Channel for 12 Gb/s Applications"
- Changed A11 from 0.105 +/- 0.025 to 0.10 +/- 0.05
- Added note to E01 to clarify contact zone
- Figure 6.8 and Table 6.8 - 1x4 removed
Rev 2.6 August 9, 2012
- Editorial revision to adopt latest template
- Removed electrical performance requirements specified by the using interface
- Simplified titling of sections, figures and tables
- Replaced double drawings of Figure 2-1
- Sections made consistent between SFF-8643 and SFF-8644
Revision 2.7 April 22, 2013
- Adopt editorial convention of Gb/s
Revision 2.8 June 3, 2013
- Added appropriate figures for the new vertical versions
- Dimensioned the keep-out areas in the connector footprints
- Added rib to top of the right angle latch area
Revision 2.9 July 10, 2013
- Expanded Figure 3-1 to include more configurations
- Redrew figures and clarified dimensioning on vertical configurations
Revision 3.0 July 27, 2013
- Corrected some dimensions in Tables 6-1, 6-2 and 6-4
Revision 3.1 August 22, 2013
- Updated dimensions in Tables 6-1, 6-2 and 6-4
- Added R(ight angle) and V(ertical) suffixes to Tables 6-1 and 6-2
- Added optional holes to Figures 6-10 and 6-12
Revision 3.2 February 26, 2014
- Revised description 3.0
- Updated Table 3-1 to list all versions
- Revised designators in Tables 6-1 and 6-2
- Removed revision note below Table 6-4
- Revised Table 6-5 dimensions
Revision 3.3 May 15, 2014
- Title change for commonality in style with QSFP
Revision 3.4 May 25, 2014
- Revised dimensions in Figures 6-1 and 6-2
- Added 6.2 section Title
- Revised Figure 6-7 and Table 6-3 titles
- Revised Titles for Figure 6-8 and Table 6-4
- Revised Table 6-4 to add the 1x2 size
- Revised text with section 6.3 and the section Title
- Revised Table 6-5 descriptions
- Revised Figure 6-12 Title
- Revised Figure 6-14 Title
Revision 3.5 September 22, 2014
- The connector content of this specification was used to create SFF-8613
Mini Multilane 4/8X 12 Gb/s Unshielded Connector (HD12un) Page 3
Published SFF-8643 Rev 3.5
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, and
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 Committee 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
emerging product area, there is room for more than one approach. By making the
documentation on competing proposals available, 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
Electrotechnical Commission).
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:
The complete list of SFF Specifications which have been completed or are currently
being worked on by the SFF Committee can be found at:
If you wish to know more about the SFF Committee, the principles which guide the
activities can be found at:
Suggestions for improvement of this specification will be welcome. They should be
sent to the SFF Committee, 14426 Black Walnut Ct, Saratoga, CA 95070.
http://www.sffcommittee.com/ie/join.html
ftp://ftp.seagate.com/sff/SFF-8032.TXT
ftp://ftp.seagate.com/sff/SFF-8000.TXT
Mini Multilane 4/8X 12 Gb/s Unshielded Connector (HD12un) Page 4
Published SFF-8643 Rev 3.5
TABLE OF CONTENTS
1 Scope
1.1
Application Specific Criteria
2 References
Figure 3-1 Documentation to Implement a 12 Gb/s Connector
Figure 4-1 General View of Configurations
FIGURES
TABLES
Table 4-1 Configurations
Industry Documents
SFF Specifications
Sources
Conventions
3 Description
4 Overview of Referenced Specifications
Application Requirements
SFF-8613
2.1
2.2
2.3
2.4
4.1
4.2
6
6
6
6
6
6
6
7
7
7
8
7
8
8
Mini Multilane 4/8X 12 Gb/s Unshielded Connector (HD12un) Page 5
Published SFF-8643 Rev 3.5
1 Scope
This specification defines the performance requirements of the Mini Multilane
unshielded connector.
1.1 Application Specific Criteria
This connector is capable of meeting the interface requirements for the high
density internal I/O requirements of T10 SAS-3.
2 References
2.1 Industry Documents
The following interface standards and specifications are relevant to this
Specification.
- INCITS 519 SAS-3 (Serial Attached SCSI 3)
- SFF-8410 High Speed Serial Testing for Copper Links
- SFF-8613 Mini Multilane 4/8X Unshielded Connector
- SFF-8614 Mini Multilane 4/8X Shielded Connector
- SFF-8644 Mini Multilane 4/8X 12 Gb/s Shielded Connector
2.2 SFF Specifications
There are several projects active within the SFF Committee. The complete list of
specifications which have been completed or are still being worked on are listed in
the specification at ftp://ftp.seagate.com/sff/SFF-8000.TXT
2.3 Sources
Those who join the SFF Committee as an Observer or Member receive electronic copies
of the minutes and SFF specifications (http://www.sffcommittee.com/ie/join.html).
Copies of ANSI standards may be purchased from the Inter-National Committee for
Information Technology Standards (http://tinyurl.com/c4psg).
Copies of SFF, ASC T10 (SCSI), T11 (Fibre Channel) and T13 (ATA/SATA) standards and
standards still in development are available on the HPE version of CD_Access
(http://tinyurl.com/85fts).
2.4 Conventions
The dimensioning conventions are described in ANSI-Y14.5M, Geometric Dimensioning
and Tolerancing. All dimensions are in millimeters.
The ISO convention of numbering is used i.e., the thousands and higher multiples
are separated by a space and a period is used as the decimal point. This is
equivalent to the English/American convention of a comma and a period.
American
0.6
1,000
1,323,462.9
French
0,6
1 000
1 323 462,9
ISO
0.6
1 000
1 323 462.9
Mini Multilane 4/8X 12 Gb/s Unshielded Connector (HD12un) Page 6
Published SFF-8643 Rev 3.5
3 Description
This specification identifies the documentation required to implement a 12 Gb/s
unshielded connector suitable to the using applications, as illustrated in the
following pictorial representation.
SAS-3
Application
Interface
SFF-8643
Connector
Assembly
SFF-8613
Connector
Mechanical
FIGURE 3-1 DOCUMENTATION TO IMPLEMENT A 12 GB/S CONNECTOR
4 Overview of Referenced Specifications
4.1 Application Requirements
The electrical and EMI considerations for the use of this connector are specified
by the using standards listed in Section 1.1.
This connector system is based upon vertical and right angle receptacle (fixed)
connectors and (free) mating plugs. The host board footprint mounting holes contain
the critical dimensions for locating the receptacles to the host board. The
integral receptacle guide shell functions as the guide and strain relief for the
free (plug) connector interface and also provides the latching points for the plug
connector. This connector system provides positive retention along with ease of
insertion and removal.
Mini Multilane 4/8X 12 Gb/s Unshielded Connector (HD12un) Page 7