USB4® Version 2.0 Unveiled


The USB Promoter Group has announced the USB4® Version 2.0 specification, a major update to enable up to 80 Gbps of data performance over the USB Type-C® cable and connector. In contrast to prior USB protocol standards, USB4 requires SB-C connectors, and for power delivery, it requires the support of USB-PD (USB Power Delivery). Depending on the data type and application for every transfer, the USB4 technology can dynamically use a single high-speed link with differing types.

“Once again following USB tradition, this updated USB4 specification doubles data performance to deliver higher levels of functionality to the USB Type-C ecosystem,” said Brad Saunders, USB Promoter Group Chairman.

The new USB4 now delivers according to the characteristics:

  • Up to 80 Gbps operation, based on a new physical layer architecture, using existing 40 Gbps USB Type-C passive cables and newly-defined 80 Gbps USB Type-C active cables.
  • Updates to data and display protocols to better use the increase in available bandwidth.
  • USB data architecture updates now enable USB 3.2 data tunneling to exceed 20 Gbps.
  • Updated to align with the latest versions of the DisplayPort and PCIe specifications.
  • Backward compatibility with USB4 Version 1.0, USB 3.2, USB 2.0, and Thunderbolt™ 3.


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