Super Speed USB

Super Speed Universal Serial Bus (USB) was first introduced in 2008 with the release of the USB 3.0 specification. In 2015 USB 3.0 was renamed USB 3.1 Gen 1 to avoid confusion.

Super Speed USB significant features

  • Speeds of up to 5 Gbit/s are supported
  • Backwardly compatible with all speeds defined in USB 2.0
  • New, slightly larger connectors are used for Super Speed USB than are used with USB 2.0. The Hub receptacles receiving these connectors can also accept the standard 2.0 connectors.
  • Implements 8b/10b encoding in a full-duplex communications mode.

Data Signals

SuperSpeed USB uses six 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 Power Distribution

USB 3.0 provides for low-power and high-power ports. Both of these ports are able to supply their specified current while maintaining 5 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)

Notes

 Learn More

 
Designing USB with Microchip
Learn more >
 
USB Speeds and Specifications
Learn more >
 
USB Power Delivery
Learn more >
 
Type-C
Learn more >

20th Annual
Microchip MASTERs Conference 2016
Register now - Deadline: July 29

JW Marriott Desert Ridge Resort-Phoenix, AZ

© 2016 Microchip Technology, Inc.
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contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates.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.