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SFF-8083 Rev 2.5 Published 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-8083 Specification for 0.8mm Card Edge Connector for 8/10 Gbs Applications Rev 2.5 January 19 2010 Secretariat: SFF Committee Abstract: This specification defines the physical interface and general performance requirements of the mating interface for an improved 0.8mm card edge connector for use in applications up to approximately 10 Gbit/s using the upper row of contacts. One such use is as the receptacle connector for the SFF-8432 Improved Pluggable Formfactor when used with SFF-8431 Enhanced 8.5 and 10 Gigabit SFF Pluggable Module aka SFP+. 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 document. 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 Molex Chairman SFF Committee 2222 Wellington Court 14426 Black Walnut Court Lisle, Il 60532 Saratoga, CA 95070 561-447-2907x3889 408-867-6630 jay.neer_at_molex_dot_com endlcom_at_acm_dot_org 0.8mm Card Edge Connector for 8 Gbs Applications Page 1

SFF-8083 Rev 2.5 Published EXPRESSION OF SUPPORT BY MANUFACTURERS The following member companies of the SFF Committee voted in favor of this industry specification. Cinch EMC Emulex ETRI FCI Finisar Hewlett Packard Hitachi GST JDS Uniphase Luxtera Panduit Sun Microsystems Toshiba Tyco Vitesse Semiconductor The following SFF member companies voted no on the technical content of this industry specification. AMCC Amphenol Molex The following member companies of the SFF Committee voted to abstain on this industry specification. Arista Networks Avago Cortina Systems Dell Computer Foxconn Fujitsu CPA ICT Solutions LSI Meritec NetApp OpNext Sandisk Sandisk/RAD Seagate Toshiba America Volex 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 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. 0.8mm Card Edge Connector for 8 Gbs Applications Page 2

SFF-8083 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, 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. 0.8mm Card Edge Connector for 8 Gbs Applications Page 3

Published SFF-8083 Rev 2.5 Contents 1 Scope......................................................................... 5 1.1 Description of Clauses................................................... 5 2 References.................................................................... 6 2.1 Industry Documents....................................................... 6 2.2 SFF Specifications....................................................... 6 2.3 Sources.................................................................. 6 2.4 Conventions.............................................................. 6 3 General Description........................................................... 7 4 Definitions and Abbreviations................................................. 8 4.1 Definitions.............................................................. 8 4.2 Abbreviations............................................................ 9 5 Electrical Specifications.................................................... 10 5.1 Electrical Requirements................................................. 10 5.2 High Frequency Performance Requirements................................. 10 6 Mechanical Specifications.................................................... 12 6.1 Connector Configurations................................................ 12 6.2 Mechanical Requirements................................................. 13 6.3 Contact Sequencing...................................................... 13 6.4 Contact Numbering....................................................... 15 7 Connector Dimensions......................................................... 15 7.1 Paddle Card............................................................. 16 7.2 Board Side Connector.................................................... 18 7.3 Board Side Connector Footprint.......................................... 20 Figures: Figure 5-1 De-Embedding Reference Plane ......................................... 11 Figure 6-1 General view of right-angled body receptacle ......................... 12 Figure 6-2 Contact sequencing ................................................... 14 Figure 7-1 Paddle Card .......................................................... 16 Figure 7-2 Board Side Connector ................................................. 18 Figure 7-3 Board Side Connector Footprint ....................................... 20 Tables: Table 5-1 Electrical Specifications and Test Conditions ......................... 10 Table 5-2 Connector HIGH-Frequency PERFORMANCE REQUIREMENTS ..................... 11 Table 6-1 Mechanical Requirements ............................................... 13 Table 6-2 Contact Numbering ..................................................... 15 Table 7-1 Paddle Card ........................................................... 16 Table 7-2 Board Side Connector .................................................. 19 Table 7-3 Board Side Connector Footprint ........................................ 20 0.8mm Card Edge Connector for 8 Gbs Applications Page 4

SFF-8083 Rev 2.5 Published 1 Scope This specification defines the terminology and physical requirements for the mating interface and physical characteristics of the improved 0.8 mm card edge connector. The dimensions specified apply to a family of connectors with 20, 30, 50 or 70 contacts. It also defines electrical attributes that distinguish it from the SFF- 8084 0.8 mm card edge connector that defines a lower speed connector interface. Fibre Channel, 10G Ethernet, InfiniBand, other standards, and specifications such as SFP+, define requirements on the characteristic impedance and ability to transmit multi-gigabit signals to and from optical pluggable modules, and in some cases via cable assemblies. When this connector is used in such an application, it is subject to the requirements of those documents. 1.1 Description of Clauses Clause 1 contains the scope and purpose Clause 2 contains referenced and related standards and SFF specifications Clause 3 contains the general description Clause 4 contains the definitions, abbreviations and conventions Clause 5 defines the electrical conditions Clause 6 defines the mechanical conditions Clause 7 defines the connector dimensions 0.8mm Card Edge Connector for 8 Gbs Applications Page 5

SFF-8083 Rev 2.5 Published 2 References The following interface standards and specifications are relevant to this Specification. 2.1 Industry Documents The following standards and specifications are relevant to this Specification. ANSI/ASME Y14.5M Geometric Dimensioning and Tolerancing (GD&T) EIA 364-06 Contact Resistance Test Procedure For Electrical Connectors EIA 364-09 Durability Test Procedure For Electrical Connectors And Contacts EIA 364-13 Mating And Unmating Forces Test Procedures For Electrical Connectors EIA 364-21 Insulation Resistance Test Procedure For Electrical Connectors Sockets And Coaxial Contacts INCITS 352:2002 FC-PI (Fibre Channel Physical Interface) INCITS 404:200x FC-PI-2 (Fibre Channel Physical Interface - 2 T11/1625D FC-PI-3 (Fibre Channel Physical Interface - 3 T11/ FC-PI-4 (Fibre Channel Physical Interface - 4 IEEE 802.3 10 Gigabit Ethernet clause 5210GBASE-LRM clause 68 InfiniBand Architecture Specification Volume 2 T10/1601D SAS 1-1 (Serial Attached SCSI - 1.1) INF-8074i SFP (Small Formfactor Pluggable) Transceiver SFF-8075 PCI Card Version of SFP Cage SFF-8084 0.8mm Card Edge Connector SFF-8410 High Speed Serial Testing for Copper Links SFF-8431 Enhanced 10 Gigabit Small Formfactor Pluggable Module (SFP+) SFF-8432 Improved Pluggable Formfactor (IPF) SFF-8433 IPF (Improved Pluggable Formfactor) Cage SFF-8434 SFP+ Gerber Files 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://tinyurl.com/c4psg). EIA documents are available at http://global.ihs.com 802.3 Ethernet is available from http://standards.ieee.org/getieee802/802.3.html The InfiniBand Architecture Specification Volume 2 is available from http://www.infinibandta.org/specs 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. 0.8mm Card Edge Connector for 8 Gbs Applications Page 6

SFF-8083 Rev 2.5 Published English French ISO 0.6 0,6 0.6 1,000 1 000 1 000 1,323,462.9 1 323 462,9 1 323 462.9 3 General Description The improved 0.8 mm connection system is based on industry-proven card edge style contacts, which mate with a single wipe, and are very difficult to damage. 0.8 mm Card Edge connectors find their most important application where signals have rise times typically in the range of 35 ps and where positive retention is needed but ease of insertion and removal is also desired. This covers virtually all of the external inter-enclosure applications for gigabit serial applications that use balanced copper media for transmission. Design goals were minimization of crosstalk and minimum transmission line impedance discontinuity across the connector interface at signaling rates up to 11.1 GBd on the upper row of contacts. The lower row of contacts is rated at signaling rates up to 2.5 Gigabits/second. The shield (cage) contact (not shown or part of this specification) is required to make contact before any of the signal contacts upon insertion and to break contact only after all contacts are separated upon removal. This ensures that any ground potential differences between enclosures are first exposed to the shield and thereby minimizes the risk of damaging the sensitive input and output stages of the transceivers when the signal contacts are mated. A cage or latching device (not shown or part of this specification) is required to guide the mating interface (typically a paddle cad) into the connector, provide sufficient wipe on the contact interface, provide a hard stop which prevents the transceiver side from bottoming in the connector, and keeps the paddle card contacts on the connector contacts during use. This connector is primarily used as a pluggable module connector but can also be used with direct attach cable assemblies. This specification includes the minimum lengths, widths and positional tolerances of the contacts. The connector is of a straightforward construction that does not rely on advanced materials or processes, and is physically robust. Connectors compliant to SFF-8083 are also compliant to SFF-8084, but the reverse is not necessarily true. 0.8mm Card Edge Connector for 8 Gbs Applications Page 7

SFF-8083 Rev 2.5 Published 4 Definitions and Abbreviations 4.1 Definitions For the purpose of this specification, the following definitions apply: Advanced grounding contacts: Connector contacts that make first and break last and are capable of carrying power ground return currents and performing electrostatic discharge. Other terms sometimes used to describe these features are: grounding pins, ESD contacts, grounding contacts, static drain, and pre-grounding contacts. Alignment guides: Connector features that preposition insulators prior to electrical contact. Other terms sometimes used to describe these features are: guide pins, guide posts, blind mating features, mating features, alignment features, paddle card chamfers and mating guides. Centerline or CL: A real or imaginary line that is equidistant from the surface or sides of something Contact mating sequence: Order of electrical contact during mating/unmating process. Other terms sometimes used to describe this feature are: contact sequencing, contact positioning, make first/break last, EMLB (early make late break) staggered contacts, and long pin / short pin. Frontshell: That metallic part of a connector body that directly contacts the backshell or other shielding material that provides mechanical and shielding continuity between the connector and the cable. Other terms sometimes used to describe this part of a cable assembly are: housing, nosepiece, cowling, and metal shroud. Maximum component height: Distance from board surface to farthest overall module/connector feature. 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. Offset: An alignment shift from the centerline of the connector. Connector contacts may be offset from the CL Optional: This term describes features that are not required by this specification. However, if any feature defined by this specification is implemented, it shall be done in the same way as defined by the specification. Describing a feature as optional in the text is done to assist the reader. If there is a conflict between text and tables on a feature described as optional, the table shall be accepted as being correct. Right Angle: A connector design for use with printed circuit board assembly technology where the mating direction is parallel to the plane of the printed circuit board. Surface mount: A connector design and a printed circuit board design style where the connector termination points do not penetrate the printed circuit board and are subsequently soldered to the surface of the printed circuit board. Termination side: The side of the connector opposite the mating side that is used for permanently attaching conductors to the connector. Due to pin numbering differences between mating side genders the termination side shall always be 0.8mm Card Edge Connector for 8 Gbs Applications Page 8

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