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Thursday October 23, 2014

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Introduction to the new SFF8639 Connector for Backplanes.  SFF 8639 is an extension of the 8482 SAS Connector which has higher signal quality requirements (to support 12Gb/s SAS and gen 3 PCIe) and adds support for SATA Express and 4 lanes of MultiLink SAS or PCI Express.

The connector has a total of 6 High Speed signal paths, strangely each specification only ever uses up to 4 of them at any time.

 

The standard defines a backplane connector that is designed to support the following interfaces:

 

 

 

Whilst the connector is physically compatible with all of the drive types listed above, systems using this connector will probably only support a subset of these interfaces.

Information reproduced from the SFF 8639 specification downloadable from the SFF Commitee website

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