Super Speed Plus USB

Super Speed Plus Universal Serial Bus (USB) was first introduced in 2013 with the release of the USB 3.1 specification. This version features the introduction of a 10 Gbit/s transfer speed. To avoid confusion and begin a new naming convention, in 2015 USB 3.1 was named USB 3.1 Gen 2 and USB 3.0 was renamed USB 3.1 Gen 1.


Super Speed Plus USB significant features

  • Speeds of up to 10 Gbit/sec are supported
  • Backwardly compatible with all speeds defined in USB 2.0
  • New, and slightly larger connectors are used for Super Speed Plus USB than are used with USB 2.0. The Hub receptacles receiving these connectors can also accept the standard 2.0 connectors.
  • Implements 128b/132b encoding in a full-duplex communications mode.

Data Signals

Super Speed Plus USB uses 6 data lines configured in two groups

  • D+ and D- differential half-duplex signals
  • Two pairs of full-duplex differential signals (SSTX-, SSTX+, and SSRX-, SSRX+)
Pin Number Signal Description
1 VBUS power
2, 3 D- , D+ 2.0 Differential Pair
4 GND Ground
5, 6 SSRX- , SSRX+ Super Speed receiver differential pair
7 GND_DRAIN ground for return signal
8,9 SSTX- , SSTX+ Super Speed transmit differential pair

Super Speed Plus Power Distribution

USB 3.1 Gen 2 provides for low-power and high-power ports. Both of these ports are able to supply their specified current while maintaining 10 Gbit/s transfers.

  • Low-power ports provide up to 150 ma
  • High-power ports provide up to 900 ma

There are several power delivery specifications cable of supplying additional power. Not all modes can sustain the data transfer while supplying power ( see the power delivery specifications for details)


 Learn More

Designing USB with Microchip
Learn more >
USB Speeds and Specifications
Learn more >
USB Power Delivery
Learn more >
Learn more >
© 2020 Microchip Technology, Inc.
Notice: ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.