USB 3.0 Header is a 20 pin 2mm pitch header using the less common ICC pin numbering. The header has a key slot on the pin 1-10 side if enclosed.
Like the USB 2.0 header, The USB 3.0 header contains USB 3.0 ports. Unlike USB2, this links are fully separated (no shared shield) and two single links can be inserted into the header connector.
|
Pin (ICC) |
Pin Name |
Description | Port |
Equivelent IDC Pin # |
|---|---|---|---|---|
| 1 | VBus | +5V Power | 1 | 1 |
| 2 | SSRX1- | SuperSpeed recevier | 3 | |
| 3 | SSRX1+ | 5 | ||
| 4 | GND | Ground for Power | 7 | |
| 5 | SSTX1- | SuperSpeed transmitter | 9 | |
| 6 | SSTX1+ | 11 | ||
| 7 | DRAIN | Ground for Shield Drain | 13 | |
| 8 | D1- | USB 2.0 data | 15 | |
| 9 | D1+ | 17 | ||
| 10 | NC | 19 | ||
| 11 | D2+ | USB 2.0 data | 2 | 20 |
| 12 | D2- | 18 | ||
| 13 | DRAIN | Ground for Shield Drain | 16 | |
| 14 | SSTX2+ | SuperSpeed transmitter | 14 | |
| 15 | SSTX2- | 12 | ||
| 16 | GND | Ground for Power | 10 | |
| 17 | SSRX2+ | SuperSpeed recevier | 8 | |
| 18 | SSRX2- | 6 | ||
| 19 | VBUS | +5V Power | 4 | |
| 20 | No Pin | Space of Filled Keying | 2 |
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's D and Vbus pins are backward compatible with USB 2.0 connectors.
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