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USB 3.1 Specification

Universal Serial Bus Revision 3.1 Specification (.zip file format, size 41.9 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 and ECNs approved through August 11, 2014
  2. USB 3.1 Appendix E:  Repeaters
  3. USB 3.0 Adopters Agreement
  4. On-The-Go and Embedded Host Supplement to the USB Revision 3.0 Specification Revision 1.1 as of May 10, 2012
  5. Inter-Chip Supplement to the USB Revision 3.0 Specification, Revision 1.02 as of May 19, 2014
  6. USB Power Delivery Specification Rev. 2.0, Version 1.0, August 11, 2014 and corresponding Adopters Agreement and ECNs approved through November 26, 2014
  7. USB Type-C Cable and Connector Specification Revision 1.0, August 11, 2014
     

LIMITED COPYRIGHT LICENSE

The USB 3.0 Promoters grant a conditional copyright license under the copyrights embodied in the USB Type-C Cable and Connector Specification to use and reproduce the Specification for the sole purpose of, and solely to the extent necessary for, evaluating whether to implement the Specification in products that would comply with the specification. Without limiting the foregoing, use of the Specification for the purpose of filing or modifying any patent application to target the Specification or USB compliant products is not authorized. Except for this express copyright license, no other rights or licenses are granted, including without limitation any patent licenses. In order to obtain any additional intellectual property licenses or licensing commitments associated with the Specification a party must execute the USB 3.0 Adopters Agreement. NOTE: By using the Specification, you accept these license terms on your own behalf and, in the case where you are doing this as an employee, on behalf of your employer.

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
OR THE USB 3.0 PROMOTERS 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, including USB Power Delivery and USB Type-C Cable and Connector 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

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