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SFF-8661_R2.5.pdf

QSFP+

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本规范定义了QSFP + 4x模块尺寸系数的机械规范。 This specification defines the mechanical specifications for the QSFP+ 4x Module Formfactor.

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PUBLISHED SFF-8661 Rev 2.5

QSFP+ 4X Module Page 1

SFF specifications are available at http://www.snia.org/sff/specifications

SFF-8661

Specification for

QSFP+ 4X Module

Rev 2.5 June 22, 2018

Secretariat: SFF TA TWG

Abstract: This specification defines the mechanical specifications for the QSFP+ 4x

Module Formfactor.

The mechanical dimensioning allows backwards mechanical compatibility between QSFP+

4X modules plugged into most QSFP+ cages which have been implemented to SFF-8436.

The EMI leakage is expected to be similar to that when QSFP+ modules and cages are

mated.

Superior EMI performance can only be expected with mated combinations of modules

compliant with this specification and cages compliant with SFF-8663 or SFF-8683.

This specification provides a common reference for systems manufacturers, system

integrators, and suppliers.

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.

POINTS OF CONTACT:

Jay Neer

Molex, LLC.

2222 Wellington Court

Lisle, IL 60532

Ph: 561-251-8016

jay.neer@molex.com

Dan Gorenc

TE Connectivity

3101 Fulling Mill Rd

Middletown, PA 17057

Ph: 717-986-3518

daniel.gorenc@te.com

Chairman SFF TA TWG

Email: SFF-Chair@snia.org

PUBLISHED SFF-8661 Rev 2.5

QSFP+ 4X Module Page 2

Change History

December 28, 2010:

- Section 3:

o Divided Figure 3-1 into two figures (3-1 and 3-2) and updated titles

accordingly

- Section 4:

o Added "Datum Definitions" table

o Updated Figure 4-1 with the following changes:

▪ Added "Module/Plug" description to top view

▪ Added appropriate SFF document reference to each view

▪ Extended datum line through all 3 views

▪ Replaced "SEE FIGURES 12A AND 12B" WITH "EMI SOLUTION DEPENDENT"

- Section 5:

o Updated Figure 5-1 with the following changes:

▪ Added note triangle 2 to 32 MIN. dimension

▪ Added 19 MAX., 13.5 REF., 3.4 MAX. and 1.6 MAX. dimensions

o Updated Figure 5-2 with the following changes:

▪ Added "MAX." and "MIN." to 1.10 / 0.55 dimension (View K-K)

o Updated Figure 5-3 with the following changes:

▪ Replaced SFP+ PCB with QSFP+ PCB

o Updated description of Figure 5-3

- Section 6:

o Updated title (previously was Section 7)

o Replaced Table 7-1 AND 7-2 (SFP+ requirements) with Table 6-1

▪ Added text to clarify that connector is included in module

insertion/extraction

June 12, 2011:

- Global

o Removed redundant use of 25G throughout body

o All references to 25G were replaced by 32 Gb/s

o Specification Titles updated to current usage

o Added Table of Contents

January 30, 2012:

- All references to 32 Gb/s were replaced by 28 Gb/s

May 21, 2012:

- Expanded list of Industry Documents

July 7, 2012:

- Figure 5-1 was redrawn

o Note 4 was clarified

o Note 9 re higher wattage models added

o Length of transceiver outside of cage restored to the 20 Max of the MSA

Rev 1.7 (May 22, 2013):

- Corrected title (removed 'Style')

Rev 1.8 (July 29, 2013):

- Identified Datums to be corrected on Figure 4-1, Figure 5-1 and Figure 5-2

Continued on next page

PUBLISHED SFF-8661 Rev 2.5

QSFP+ 4X Module Page 3

Rev 1.9 (October 16, 2013):

- Replaced Figure 4-1

o Sidebar shows how Style A and B create a common figure

- Updated Figure 5-1

- Updated Figure 5-2

o Added Datums D and H to Detail 1

- Revised Table 5-1 (was 6-1) cage retention force from 180N to 125N

Rev 2.0 (February 21, 2014):

- Replaced reference to SFF-8436 with EIA 964 in 2-1

- Replaced figures 4-1, 5-1, 5-2 to improve quality

- Deleted two rows in Table 6-1 that did not apply to the Plug/Module

Rev 2.1 (May 25, 2014):

- Restored two rows in Table 6-1 that should not have been deleted

Rev 2.2 (August 7, 2014):

- Replaced Figure 5-2 (the view of section J-J had the radius 0.05 MIN and the

dimension 29.60 REF pointing to the wrong location).

Rev 2.3 (September 13, 2014):

- Removed references to 28 Gb/s

Rev 2.4 (October 3, 2017)

- Updated to SNIA format

- Revised abstract

- Reformatted Change History

- Fixed broken links in Foreword

- Updated applications (Section 1.1)

- Added EIA document references

- Clarified “fixed” and “free” definitions

- All references to “pluggable modules,” “plugs,” or “modules” changed to

“module;” added definition for “module”

- Minor editorial issues resolved

- Renamed Figure 3-2

- Corrected table in Figure 4-1

- Clarified chamfer/radius callout in Figure 5-2

- Updated Section 5.3 (Insertion, Extraction, and Retention Forces) to agree

with other SFF documents for QSFP

Rev 2.5 (June 22, 2018)

- Minor document number was increased to correct an error in the document

numbering history. No other changes were made to this document’s content.

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