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USB 3.1 Specification

Universal Serial Bus Revision 3.1 Specification (.zip file format, size 29.8 MB) provides the technical details to understand USB 3.1 requirements and design USB 3.1 compatible products. Modifications to the USB 3.1 specification are made through Engineering Change Notices (ECNs). Enclosed in this zip file are the following documents:

  1. The USB 3.1 Specification released on July 26, 2013
  2. USB 3.0 Adopters Agreement
  3. On-The-Go and Embedded Host Supplement to the USB Revision 3.0 Specification Revision 1.1 as of May 10, 2012
  4. USB Power Delivery Specification Rev. 1.0, Version 1.3, Including Errata through March 11, 2014
  5. Inter-Chip Supplement to the USB Revision 3.0 Specification, Revision 1.01 as of February 11, 2013
     

LEGAL DISCLAIMER

THIS SPECIFICATION IS PROVIDED "AS IS" AND WITHOUT ANY WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED. WITHOUT LIMITATION, THERE IS NO WARRANTY OF NON-INFRINGEMENT, NO WARRANTY OF MERCHANTABILITY, AND NO WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. ALL WARRANTIES ARE EXPRESSLY DISCLAIMED.

USER ASSUMES THE FULL RISK OF USING THIS SPECIFICATION. IN NO EVENT SHALL USB-IF BE LIABLE FOR ANY ACTUAL, DIRECT, INDIRECT, PUNITIVE, OR CONSEQUENTIAL DAMAGES ARISING FROM SUCH USE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

USB 3.0 Adopters Agreement
USB 3.0 Adopters Agreement (.pdf file format, size 32k)
The USB 3.0 Adopters Agreement allows a signing company to participate in a reciprocal, royalty-free licensing arrangement for compliant products. This agreement applies to both the USB 3.0 and USB 3.1 specifications. Any USB 3.0 Adopters Agreement shall only be effective if received within one (1) year after first sale of products that include 'Compliant Products'. See the USB 3.0 Adopters Agreement for details.

Archived USB Specifications can be found here.

Intellectual Property Rights Notices
This page contains links to a reproduction of letters received by the USB-IF from patent owners asserting intellectual property rights that may be pertinent to the implementation of a USB specification. For specific information regarding the licensing of intellectual property rights arising from a particular USB Specification, the reader should consult the appropriate USB Adopters Agreement for that specification.

Notice to all readers: The USB-IF is providing this information as a courtesy to our members 'AS IS' and without warranty of any kind. The USB-IF is not responsible for content of the individual postings. The USB-IF will not be responsible for identifying patents for which a license may be required by a USB Specification nor for conducting inquiries into the legal validity or scope of those patents that are brought to its attention.

Compliance Updates

Please review the USB-IF Compliance Updates webpage frequently and subscribe to the news feed for the latest information regarding the USB-IF Compliance Program.