| XFP MSA |
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SFF Committee
INF-8077i
10 Gigabit Small Form Factor Pluggable Module
Revision 4.5 August 31, 2005 |
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Abstract: This specification defines the electrical, management, and mechanical interfaces of the XFP module. The
module is a hot pluggable small footprint serial-to-serial data-agnostic multirate optical transceiver, intended to
support Telecom (SONET OC-192 and G.709 “OTU-2”) and Datacom applications ( 10 Gb/s Ethernet and 10 Gb/s Fibre Channel). Nominal data rates range from 9.95 Gb/s, 10.31 Gb/s, 10.52 Gb/s, 10.70 Gb/s, and the emerging
11.09 Gb/s. The modules support all data encodings for these technologies. The modules may be used to implement
single mode or multi-mode serial optical interfaces at 850 nm, 1310 nm, or 1550 nm. The XFP module design
may use one of several different optical connectors. An adaptable heatsink option allows a single module design to
be compatible with a variety of hosts. |
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Support: This document was adopted by the XFP MSA and is provided to the SFF for distribution and as a source
document for related SFF projects.. |
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Documentation: This document has been prepared according to the guidelines and agreements of the XFP MSA.
The XFP MSA has the stated intention of encouraging broad and rapid industry adoption of the specification. The
XFP specification and the technologies it uses may be offered to formal standards bodies to further support the
adoption of the specification. |
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The module design and the volume of production are expected to enable very low cost 10 Gb/s solutions. |
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 XFP Applications: |
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- OC192/STM-64 9.95 Gb/s
- 10 Gigabit FC 10.5 Gb/s
- G.709 10.7 Gb/s
- 10 Gigabit Ethernet 10.3 Gb/s
- Smaller space and lower cost alternative to parallel-optics VSR.
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XFP Value Propositions |
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- Protocol Agnostic - "any application, any rate".
- Allows 16 XCVRs on a typical 19" rack with 23mm pitch density.
- Single footprint for all links.
- Less than 1/3 the power and size of an MSA with parallel interface.
- Hot plugable.
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XFI (10 Gigabit Serial Electrical Interface) Electrical Signaling |
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- Supports 12" of FR4 with one connector
- Low EMI and power due to nominal 500 mV differential drive.
- Slew control for improved Signal Integirty and lower EMI.
- TX and RX signals each are a 100 Ohm differential pair, AC coupled for simplicity.
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Specification Development |
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Mechanical / Form Factor of XFP |
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- Module size
- Electrical connector
- Guidance and retention
- Thermal analysis
- Thermal measurement standard
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Electrical specification of XFP |
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- PCB and connector measurement and modeling
- Electrical levels
- Jitter specifications
- Hosting board reference design
- Eye opener Specifications
- Power supplies and max PD
- EMI containment
- Electrical compliance measurement standard
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for more information please download the full version of the XFP MSA |
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(Revision 4.5 August 31, 2005) |
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