USB4 standard

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 USB4 standard

On September 3, 2019, the USB Developer Forum (USB-IF) officially released the USB4 standard. It is expected that the product that meets the USB4 specification will be launched by the end of 2020.

Compared with the current USB 3.2 standard, USB4 will have three characteristics: double the transmission speed, compatible with lightning 3, and support dynamic bandwidth allocation.

Double the transmission speed

The USB4 is equipped with a dual-channel mode using the USBType-C interface. The transmission speed is up to 40Gbps, which is twice the maximum transmission speed of the current USB 3.2 standard. However, the transmission speed of up to 40Gbps is only applicable to the certified cable. .

Compatible with lightning 3

Thunderbolt 3 is the fastest transmission protocol on the market. The USB4 standard is not only backward compatible with USB 3.2, USB 2.0 and other protocols, but also compatible with Thunderbolt 3. Under the USB4 standard, any manufacturer that manufactures USB4 devices or cables can make it It is compatible with Thunderbolt 3.

Support dynamic bandwidth allocation

Under the USB4 standard, it supports multiple synchronous data and image transmission protocols to share the maximum transmission bandwidth on the cable.

In addition to the maximum 40Gbps transmission speed, USB4 has 10Gbps and 20Gbps speeds. However, for the specific naming of these three transmission speeds, the charging head network has not yet obtained relevant information. It is worth noting that USB4