USB 3 Micro-B connector
USB 3.0 also introduced a new Micro-B cable plug, which consists of a standard USB 1.x/2.0 Micro-B cable plug, with additional 5-pin plug stacked on side of it. That way, USB 3.0 Micro-A host connector preserved its backward compatibility with the USB 1.x/2.0 Micro-B cable plugs. However, it is not possible to plug a USB 3.0 Micro-B plug into a USB 2.0 Micro-B receptacle, due to a physically larger connector.
| Pin Number |
Pin Name |
Description |
|---|---|---|
| 1 | VBUS | +5V |
| 2 | USB D- | USB 2.0 differential pair |
| 3 | USB D+ | USB 2.0 differential pair |
| 4 | OTG ID | USB OTG ID for identifying lines |
| 5 | GND | Ground |
| 6 | USB3 SSTX- | USB 3.0 signal transmission line |
| 7 | USB3 SSTX+ | USB 3.0 signal transmission line |
| 8 | GND | Ground |
| 9 | USB3 SSRX- | USB 3.0 signal receiving line |
| 10 | USB3 SSRX+ | USB 3.0 signal receiving line |
USB 3.0 receptacles are backward compatible with USB 2.0 connectors.
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