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9 pin USB 3.0 Standard-A, Standard-B Plugs and 11 pin USB 3.0 Powered-B Plug connector layout
9 pin USB 3.0 Standard-A, Standard-B Plugs and 11 pin USB 3.0 Powered-B Plug connector
at the USB cable
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 combines USB 2.0 bus and new SuperSpeed bus with transfer rate up to 5.0 Gbit/s.

 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

 

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.

 

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