SFF-8432协议.pdf-资料库

Published SFF-8432 Rev 5.0 SFF Committee documentation may be purchased in electronic form. SFF specifications are available at ftp://ftp.seagate.com/sff SFF Committee SFF-8432 Specification for Improved Pluggable Formfactor Rev 5.0 July 16, 2007 Secretariat: SFF Committee Abstract: This specification defines the mechanical specifications for the Improved Pluggable Formfactor (IPF). The mechanical dimensioning allows backwards compatibility between IPF modules plugged into most SFP cages which have been implemented to SFF-8074i. It is anticipated that when the application requires it, manufacturers will be able to supply cages that accept SFP style modules. In both cases the EMI leakage is expected to be similar to that when SFP modules and cages are mated. Superior EMI performance can only be expected with mated combinations of IPF modules and cages. This specification provides a common reference for systems manufacturers, system integrators, and suppliers, of module style interconnects. 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 in this specification does not assure that the specific component is actually available from suppliers. If such is supplied it shall 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: Michael D. Long I. Dal Allan Amphenol Canada Corp Chairman SFF Committee 1408 Woodhaven Drive 14426 Black Walnut Court Hummelstown, PA 17036 Saratoga CA 95070 Ph: 717-566-1665 Ph: 408-867-6630 michaello@amphenolcanada.com endlcom@acm.org Improved Pluggable Formfactor Page 1

Published SFF-8432 Rev 5.0 EXPRESSION OF SUPPORT BY MANUFACTURERS The following member companies of the SFF Committee voted in favor of this industry specification. Amphenol EMC Emulex ENDL ETRI FCI Finisar Fujitsu CPA Hewlett Packard JDS Uniphase Molex Picolight Samsung Sumitomo Sun Microsystems Toshiba America Tyco AMP Unisys Vitesse Semiconductor The following member companies of the SFF Committee voted to abstain on this industry specification. AMCC Avago Brocade Clariphy Comax Cortina Systems Foxconn Hitachi GST Intel LSI Logic Seagate 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. Improved Pluggable Formfactor Page 2

Published SFF-8432 Rev 5.0 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. Improved Pluggable Formfactor Page 3

Published SFF-8432 Rev 5.0 SFF Committee -- Improved Pluggable Formfactor 1. Scope This specification defines the terminology and mechanical requirements for a pluggable transceiver module. This specification also includes critical dimensions of the IPF cage. This specification is also intended to facilitate the implementation of 1 x "n" ganged and the 2 x "n" stacked cage configurations. The need for this specification became evident when it was realized that some SFP modules and cage designs do not perform adequately in terms of EMI leakage, and cannot meet the needs for higher data rates. The IPF is an improved transceiver style which has tighter mechanical tolerances on the module and enhanced EMI characteristics when mated with a cage designed for the IPF module. Please note that there are additional cage requirements specified in this document to allow proper function of the IPF modules in application. These improvements make the IPF suitable for current SFP applications as well as those at higher transfer rates. 1.1 Description of Clauses Clause 1 contains the Scope and Purpose. Clause 2 contains References and Related Standards and SFF Specifications. Clause 3 contains the General Description. Clause 4 contains the Module Dimensions. Clause 5 contains examples of Cage Requirements. Clause 6 contains examples of Cage Configurations. 2. References The SFF Committee activities support the requirements of the storage industry, and it is involved with several standards. 2.1 Industry Documents The following documents are relevant. - ASME Y14.5.1M-1994, Mathematical Definition of Dimensioning and Tolerance Principles - INF-8074i 1.0 SFP (Small Formfactor Pluggable) Transceiver - SFF-8083 0.8mm SFP+ Compliant Card Edge Connector - SFF-8431 SFP+ 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). Copies of SFF, T10 (SCSI), T11 (Fibre Channel) and T13 (ATA) standards and standards still in development are available on the HPE version of CD_Access (http://tinyurl.com/85fts). 2.4 Conventions Improved Pluggable Formfactor Page 4

Published SFF-8432 Rev 5.0 The American convention of numbering is used i.e., the thousands and higher multiples are separated by a comma and a period is used as the decimal point. This is equivalent to the ISO/IEC convention of a space and comma. American: ISO: 0.6 0,6 1,000 1 000 1,323,462.9 1 323 462,9 2.5 Definitions For the purpose of SFF Specifications, the following definitions apply: Optional: This term describes features which are not required by the SFF Specification. However, if any feature defined by the SFF 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. Reserved: Where this term is used for defining the signal on a connector pin its actual function is set aside for future standardization. It is not available for vendor specific use. Where this term is used for bits, bytes, fields and code values; the bits, bytes, fields and code values are set aside for future standardization. The default value shall be zero. The originator is required to define a reserved field or bit as zero, but the receiver should not check Reserved fields or bits for zero. Dimension, Reference: A dimension used for information purposes only. A reference dimension is a repeat of a dimension or is derived from other values shown on the drawing or on related drawings. It is considered auxiliary information and does not govern production or inspection operations. Improved Pluggable Formfactor Page 5

Published SFF-8432 Rev 5.0 3. General Description This specification defines the complete mechanical dimensions of the IPF transceiver module. The IPF module and cage system provide a superior alternative, in terms of interoperability and EMI control, to the SFP system. The dimensions for the module are normative. FIGURE 3-1: TYPICAL MODULES Improved Pluggable Formfactor Page 6

Published SFF-8432 Rev 5.0 4. IPF Module The IPF module is described in Figure 4-1, Figure 4-2 and Figure 4-3. Improved Pluggable Formfactor Page 7 FIGURE 4-1: IPF MODULE

Published SFF-8432 Rev 5.0 FIGURE 4-2: LATCH POST DETAIL Improved Pluggable Formfactor Page 8

资料库

SFF-8432协议.pdf

相关推荐

行业

热门标签

最新资料