Computer buses and slots connectors pinouts
USB 3.0 is the successor of USB 2.0. USB 3 reduces the time required for data transmission, reduces power consumption, and is backward compatible with USB 2.0

USB 3.0 details

USB 3.0 is the third major version of the Universal Serial Bus (USB) standard for interfacing computers and electronic devices. USB 3.0 combines USB 2.0 bus and new SuperSpeed bus with transfer rate up to 5.0 Gbit/s, which is about ten times faster than the USB 2.0 standard. USB 3.0 connectors are usually distinguished from their USB 2.0 counterparts by blue color-coding of the receptacles and plugs, and the initials SS.

USB 3.1 details

A successor standard, USB 3.1 (USB 3.1 Gen 2), was released in July 2013 with the new transfer mode SuperSpeed+ that can transfer data at up to 10 Gbit/s (1.25 GB/s, twice the rate of USB 3.0), bringing its theoretical maximum speed on par with the first version of the Thunderbolt interface.

 Pinout of Standard-A USB 3.0 connector

Pin
Number
Pin
Name
Description
1 VBus +5V Power
2 USB D-  USB 2.0 data
3 USB D+
4 GND  Ground for power return
5 StdA_SSRX-  SuperSpeed receiver
6 StdA_SSRX+  SuperSpeed receiver
7 GND_DRAIN  Ground for signal return
8 StdA_SSTX-  SuperSpeed transmitter
9 StdA_SSTX+  SuperSpeed transmitter

 

 Pinout of Standard-B USB 3.0 connector

Pin
Number
Pin
Name
Description
1 VBus +5V Power
2 USB D-  USB 2.0 data
3 USB D+
4 GND  Ground for power return
8 StdA_SSRX-  SuperSpeed receiver
9 StdA_SSRX+  SuperSpeed receiver
7 GND_DRAIN  Ground for signal return
5 StdA_SSTX-  SuperSpeed transmitter
6 StdA_SSTX+  SuperSpeed transmitter

 

Pinout of Powered-B USB 3.0 connector

Pin
Number
Pin
Name
Description
1 VBus +5V Power
2 USB D-  USB 2.0 data
3 USB D+
4 GND  Ground for power return
8 StdA_SSRX-  SuperSpeed receiver
9 StdA_SSRX+  SuperSpeed receiver
7 GND_DRAIN  Ground for signal return
5 StdA_SSTX-  SuperSpeed transmitter
6 StdA_SSTX+  SuperSpeed transmitter
10 DPWR Power provided by device
11 DGND Ground return for DPWR

USB 3.0 and 3.1 connectors

A USB 3.0 Standard-A receptacle accepts either a USB 3.0 Standard-A plug or a USB 2.0 Standard-A plug. Conversely, it is possible to plug a USB 3.0 Standard-A plug into a USB 2.0 Standard-A receptacle. Similar principle of backward compatibility applies to connecting a USB 2.0 Standard-A plug into a USB 3.0 Standard-A receptacle. The Standard-A is used for connecting to a computer port, at the host side.

A USB 3.0 Standard-B receptacle accepts either a USB 3.0 Standard-B plug or a USB 2.0 Standard-B plug. Backward compatibility applies to connecting a USB 2.0 Standard-B plug into a USB 3.0 Standard-B receptacle. However, it is not possible to plug a USB 3.0 Standard-B plug into a USB 2.0 Standard-B receptacle, due to a physically larger connector. The Standard-B is used at the device side.

Since USB 2.0 and USB 3.0 ports may coexist on the same machine and they look similar, USB 3.0 specification mandates appropriate color-coding and recommends that the Standard-A USB 3.0 connector has a blue insert. The same color-coding applies to the USB 3.0 Standard-A plug.

A new feature is the SuperSpeed bus, which provides a fourth transfer mode at 5.0 Gbit/s. The raw throughput is 4 Gbit/s, and the specification considers it reasonable to achieve 3.2 Gbit/s (0.4 Gbyte/s or 400 MByte/s), or more, after protocol overhead.

USB 3.0 receptacles are backward compatible with USB 2.0 connectors.

 

According to 12 reports in our database (6 positive and 3 negative) this pinout should be correct.

Is this pinout
USB 3.0 connector visual pinout:
USB 3.0 connector diagram
click to enlarge
Source(s) of this and additional information: https://en.wikipedia.org/wiki/USB_3.0, USB datasheets
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