USB4 Specification Introduced: 40 Gbps, Sort-C, TB3 Help

The USB Promoter Group has introduced the upcoming launch of the USB4 specification. The brand new customary relies on Intel's Thunderbolt protocol and helps a variety of options, together with information switch charges of as much as 40 Gbps, show interfaces and energy. The detailed USB4 specification will probably be launched in mid-2019.

The USB4 specification relies on the Thunderbolt protocol that Intel has contributed to the USB Promoter Group. The brand new interface makes use of USB Sort-C connectors and is backwards appropriate with the USB, USB three.2 and Thunderbolt three interfaces. The utmost information switch fee supported by the brand new USB4 interface is 40 Gbps over 40 Gbps licensed cables. USB4 additionally helps varied show protocols and energy provide.

The USB4 customary will probably be formally ratified in mid-2019. Presently, over 50 firms are actively concerned within the remaining part of the design of the USB4 specification.

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Primarily based on what we all know concerning the USB4 specification at the moment, the brand new customary will use the Thunderbolt protocol, however it is not going to be precisely Thunderbolt three as a result of its performance is prone to be totally different.

USB specs

USB three.1
Gene 2
USB three.2
Gen 2×2

Different branding

Excessive velocity
Pace ​​+
Pace ​​+
Pace ​​+

12 Mbps
480 Mbps
5 Gbps
10 Gbps
20 Gbps
40 Gbps

8b / 10b
128b / 132b


The contribution of the Thunderbolt three protocol to the USB Promoter Group primarily brings TB3 to mainstream PC platforms, enabling a number of firms to combine their assist into their merchandise. In the meantime, Intel's Ice Lake processors would be the first CPUs to natively assist Thunderbolt three.

"Publishing the Thunderbolt protocol specification is a big milestone in making right this moment's easiest and most versatile port out there to everybody," stated Jason Ziller, common supervisor of the Shopper Connectivity division at Intel. "Working with the USB Promoter Group, we’re opening the door to innovation for a variety of units and rising compatibility to supply customers with a greater expertise."

Associated Studying

Sources: USB Promoter Group Intel

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