USB 3.0, the third major revision of the Universal Serial Bus (USB). Support full-duplex, and use the send list section to send data, the power supply standard is 900mA, and theoretically has the potential to support optical fiber transmission, the transmission speed is 5Gbit/s.
USB 3.0 is designed to be compatible with USB 2.0 and USB 1.1 and features three levels of multi-layer power management to provide different power management solutions for different devices.

USB 3.0 adopts new packet routing technology, and the cable is designed with 8 internal lines. Except VBus and GND as power supply lines, the remaining 3 pairs are data transmission lines, which retain D+ and D- compatible USB 2.0 lines. The new SSRX and SSTX are designed for the new version of the line, so USB 3.0 has several contacts than USB 2.0.
The USB 3.0 Standard-A interface continues to be the same size as the previous version. The appearance is differentiated in blue, except that the internal contacts change and the new contacts will be placed side by side with the current four contacts. Introduce spread-spectrum clock technology to reduce the escape of electromagnetic radiation.