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SFF-8482_R2.5.pdf

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    This document was developed by the SFF Committee prior to it becoming the SFF TA (Technology Affiliate) TWG (Technical Working Group) of the SNIA (Storage Networking Industry Association) in 2016. The information below should be used instead of the equivalent herein. POINTS OF CONTACT: SFF TA TWG Chair Email: sff-chair@snia.org. LOCATION OF SFF DOCUMENTS: http://www.snia.org/sff/specifications. Suggestions for improvement of this specification are welcome and should be submitted to http://www.snia.org/feedback. If you are interested in participating in the activities of the SFF TA TWG, additional information and the membership application can be found at: http://www.snia.org/sff.
    PUBLISHED SFF Committee documentation may be purchased in electronic form. SFF specifications are available at ftp://ftp.seagate.com/sff SFF-8482 Rev 2.5 SFF Committee SFF-8482 Specification for Serial Attachment 2X Unshielded Connector Rev 2.5 August 31, 2018 Secretariat: SFF Committee Abstract: This specification defines an Unshielded dual lane Input/Output connector for serial interface unshielded devices, backplanes and cables. There are multiple using generations based on performance. 3 Gb/s SFF-8678 12 Gb/s SFF-8680 24 Gb/s SFF-8681 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 I. Dal Allan Industry Standards Manager Chairman SFF Committee Molex 14426 Black Walnut Court 2222 Wellington Court Saratoga, CA 95070 Lisle, Il 60532 561-447-2907 408-867-6630 jay.neer@molex.com endlcom@acm.org Serial Attachment 2X Unshielded Connector Page 1
    PUBLISHED SFF-8482 Rev 2.5 EXPRESSION OF SUPPORT BY MANUFACTURERS The following member companies of the SFF Committee voted in favor of this industry specification. Adaptec Amphenol Comax Dell Dell Computer EMC ENDL FCI Foxconn Fujitsu CPA Hewlett Packard HGST Hitachi Cable Hitachi GST IBM Intel LSI MGE Molex NetApp Sandisk Seagate Sun Microsystems TE Connectivity Unisys Volex Western Digital The following SFF member companies voted no on the technical content of this industry specification. All Best Technique The following member companies of the SFF Committee voted to abstain on this industry specification. Amphenol Avago Brocade Emulex FCI Fiberxon Finisar Foxconn Fujitsu Components Infineon LSI Luxshare-ICT Madison Cable Maxtor Micrel Nexans Oclaro Panduit Picolight Pioneer Sumitomo Toshiba Toshiba America TriQuint Vitesse Semiconductor Xyratex 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 validity of a claim or claims 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. Serial Attachment 2X Unshielded Connector Page 2
    SFF-8482 Rev 2.5 PUBLISHED Change History Revision 2.3 - Edited out symbols because of reports that a few were not being displayed on screen correctly by some PDF readers. - Clarified first and second stage content in 5.1 per request. Revision 2.4 - p2 reflects support of SFF-8482 and SFF-8680 - Body replaced by SFF-8680 mechanical content which had enhanced host board solder pads and attachment specifications. Previous history of SFF-8680: - Footprints of SFF-8482 and SFF-8680 defined as Appendixes - SFF-8680 1.5 o Adopted common representation for SFF-8630/SFF-8639/SFF-8680 Table 6-x Performance Requirements Appendix A introductory paragraphs - SFF-8680 1.6 o Corrected Abstract EIA-966 reference to be formerly SFF-8482 - SFF-8680 1.7 o Editorial update to auto-generate Appendix in headings and TOC. - SFF-8680 1.8 o Added EIA reference for Temperature Rise in Electrical Requirements Table - SFF-8680 1.9 o Added additional footprints to Appendix A 1. Through-hole (Figure A-3) 2. Hybrid (Figure A-4) Rev 2.5 (August 31, 2018) - Document to be withdrawn from EIA; other than the changes to the header and cover page, no content or formatting changes have been made since Rev 2.4 of this document. Serial Attachment 2X Unshielded Connector Page 3
    SFF-8482 Rev 2.5 PUBLISHED 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: 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. Serial Attachment 2X Unshielded Connector Page 4
    PUBLISHED CONTENTS SFF-8482 Rev 2.5 1. Scope 2. References Application Specific Criteria Industry Documents SFF Specifications Sources Conventions Definitions 3. General Description 4. Dimensioning Requirements Connector Interface General Tolerances 4.1 4.2 1.1 2.1 2.2 2.3 2.4 2.5 5.1 5.2 5.3 6.1 6.2 5. Backplane Fixed (Receptacle) Interface Features Blind Mating Device to Backplane Location Hot Plugging 6. Ratings Current Temperature 7. General Connector Performance Requirements A. Appendix (Informative): Receptacle PCB Footprints (High Performance) B. Appendix (Informative): Receptacle PCB Footprints FIGURES Figure 2-1 Mating Side Gender Figure 3-1 General Views Figure 4-1 Device Free (Plug) Connector Figure 4-2 Device Free (Plug) Connector Detail and Section View Figure 4-3 Backplane Fixed (Receptacle) Connector Figure 4-4 Backplane Fixed (Receptacle) Connector Section View Figure 4-5 Cable Fixed (Receptacle) Connector Figure 5-1 Blind Mate Tolerance Zones Figure 5-2 Device to Backplane Location Figure_ A-1 Printed Circuit Board Detail Surface Mount Figure_ A-2 Printed Circuit Board Detail Alternate Surface Mount Figure_ A-3 Printed Circuit Board Detail Through Hole Figure_ A-4 Printed Circuit Board Detail Hybrid Figure_ B-1 Through Hole Printed Circuit Board Detail (Press Fit & Solder Pin) Figure_ B-2 Surface Mount Printed Circuit Board Detail Figure_ B-3 Hybrid Printed Circuit Board Detail Table 5-1 Hot Plug Contact Sequencing Table 7-1 Electrical Requirements Table 7-2 Mechanical Requirements Table 7-3 Environmental Requirements TABLES 6 6 6 6 6 6 6 6 8 9 9 9 15 15 16 17 19 19 19 19 21 23 7 8 10 11 12 13 14 16 16 21 21 22 22 23 23 24 18 19 20 20 Serial Attachment 2X Unshielded Connector Page 5
    PUBLISHED SFF Committee -- Serial Attachment 2X Unshielded Connector 1. Scope SFF-8482 Rev 2.5 This specification defines the mechanical and connector contact performance requirements for a composite connector system. This composite system is designed to support high speed serial signals and power on different contacts within the same housing. 1.1 Application Specific Criteria Intended applications for this connector system include Serial Attached SCSI (SAS) as specified by the T10 standards and for other applications requiring such a connector system. 2. References 2.1 Industry Documents The following interface standards are relevant to this SFF Specification. - ASME Y14.5M Dimensioning and Tolerancing - EIA-364-D Electrical Connector/Socket Test Procedures Including Environmental Classifications (see Section 7 for relevant test procedures) - INCITS 478 Serial Attached SCSI 2.1 (SAS-2.1) - INCITS 519 Serial Attached SCSI - 3 (SAS-3) - INCITS 534 Serial Attached SCSI - 4 (SAS-4) - SFF-8223 2.5 inch Form Factor Drive w/Serial Attached Connector (EIA-720) - SFF-8323 3.5 inch Form Factor Drive w/Serial Attached Connector (EIA-740) - SFF-8678 Serial Attachment 2X 3 Gb/s Unshielded Connector - SFF-8680 Serial Attachment 2X 12 Gb/s Unshielded Connector - SFF-8681 Serial Attachment 2X 24 Gb/s Unshielded 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 InterNational Committee for Information Technology Standards (http://www.techstreet.com/incitsgate.tmpl). 2.4 Conventions 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 2.5 Definitions For the purpose of SFF Specifications, the following definitions apply: Fixed: Used to describe the gender of the mating side of the connector that accepts Serial Attachment 2X Unshielded Connector Page 6
    SFF-8482 Rev 2.5 PUBLISHED its mate upon mating. This gender is frequently, but not always, associated with the common terminology "receptacle". Other terms commonly used are "female" and "socket connector". The term "fixed" is adopted from EIA standard terminology as the gender that most commonly exists on the fixed end of a connection, for example, on the board or bulkhead side. In this specification "fixed" is specifically used to describe the mating side gender illustrated in Figure 3-1 as Backplane "Fixed" (receptacle)and Cable "Fixed" (receptacle). Fixed Board: A connector that uses a fixed gender mating side and a termination side suitable for any of the printed circuit board termination technologies Free: Used to describe the gender of the mating side of the connector that penetrates its mate upon mating. This gender is frequently, but not always, associated with the common terminology "plug". Other terms commonly used are "male" and "pin connector". The term "free" is adopted from EIA standard terminology as the gender that most commonly exists on the free end of a connection, for example, on the cable side. In this specification "free" is specifically used to describe the mating side gender illustrated in Figure 3-1 as Device "Free" (plug). Free Board: A connector that uses a free gender mating side and a termination side suitable for any of the printed circuit board termination technologies Mating side: The side of the connector that joins and separates from the mating side of a connector of opposite gender. Other terms commonly used in the industry are mating interface, separable interface and mating face. FIGURE 2-1 MATING SIDE GENDER Serial Attachment 2X Unshielded Connector Page 7
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