The USB4 specification has been developed. Free Technical Library News

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USB4 specification developed

03.09.2019

The USB Implementers Forum, an American non-profit organization that develops the USB data transfer interface, has published data sheets for a new variant called USB4.

The first version of the USB interface was developed in the mid-1990s by a group of companies that included Intel, Microsoft, Philips, and US Robotics. It was conceived as a universal way to connect devices to a computer instead of several that existed at that time. USB was supposed to expand the list of devices available for linking, including adding mobile phones to them, provide hot plugging and achieve ease of use.

Today, USB is the most popular and in fact the main interface for connecting peripherals. Since then, the standard has gone through several updates: 2.0, 3.0 and 3.2. The maximum data transfer rate has increased from 1,5 megabits per second for version 1.0 to 20 gigabits for version 3.2. The new standard, called USB4, will be even twice as fast, with a top speed of 40 gigabits per second.

It will use a balanced USB type-C port and will remain compatible with USB 3.2, USB 2.0 and Thunderbolt 3. Like the latest versions, USB4 will support video as well as data transfer, making it possible to connect displays. The published specification promises that the first devices with the new USB4 interface may hit the market as early as 2020.

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