In early March of this year, the USB-IF official organization announced the next generation of USB4 (Note that it is not USB 4.0). Now, the USB4 standard specification is officially announced!
USB is definitely the most widely used interface in the history of technology, and the latest USB4 is the biggest change in the history of this interface.
USB4 introduced the Thunderbolt lightning protocol specification that Intel previously donated to the USB promotion organization. The two-link operation (Two-lane), the transmission bandwidth has doubled to 40Gbps, which is exactly the same as the Thunderbolt 3.
Of course, to achieve such a transmission bandwidth, a new and certified data line is required.
While introducing the new underlying protocol, USB4 still maintains good compatibility, and is backward compatible with USB 3.2/3.1/3.0, Thunder 3, which is now USB, Thunder 3 device and data cable, still available on USB4 interface Used on.
USB4 will only have a USB Type-C interface (which is also used by Lightning 3), and supports a variety of data and display protocols, including DisplayPort, which can fully utilize high-speed bandwidth and USB PD power supply.
As for when the USB4 device will be available, the USB-IF organization has not given a clear timetable. Obviously there are still, etc. After all, USB 3.2 (20Gbps) has not matured yet.