USB 3.2 ANNOUNCED

USB 3.2 is been announced by USB 3.0 promoter group that defines the multi-lane operation for new USB 3.2 hosts and devices.

As of now, we have;
USB 3.0 – 5 Gb/s
USB 3.1 Gen 1 – 5 Gb/s
USB 3.1 Gen 2 – 10 Gb/s
USB 3.2 – 20 Gb/s


As we know that existing USB hosts and devices were originally designed as single-lane solutions, USB Type-C cables were designed to support multi-lane operation to ensure a path for scalable performance.

USB 3.2 hosts and devices would be designed as multi-lane solutions which allow up to two lanes of 5Gbps or two lanes of 10 Gbps operation. This doubles the performance across existing cables.

“When we introduced USB Type-C to the market, we intended to assure that USB Type-C cables and connectors certified for SuperSpeed USB or SuperSpeed USB 10 Gbps would as produced, support higher performance USB as newer generations of USB 3.0 were developed,” said Brad Saunders, USB 3.0 Promoter Group Chairman. “The USB 3.2 update delivers the next level of performance.”

“With increased performance and seamless compatibility, the new USB 3.2 specification brings, even more, speed and bandwidth benefits to new USB 3.2 devices, while remaining compatible with USB 3.0 and earlier devices,” said Roanne Sones, General Manager, Strategy, and Ecosystem for Windows and Devices, Microsoft. “We’re excited to work with our partners in the USB 3.0 Promoter Group to help showcase these benefits to users around the world.”


Characteristics of USB 3.2:-

  • Two-lane operation using existing USB Type-C cables.
  • Continued use of existing SuperSpeed USB physical layer data rates and encoding techniques.
  • Minor update to hub specification to address increased performance and assure seamless transitions between single and two-lane operation.

Conclusion:-

  • Everyone expected for the USB 4.0 release but USB 3.0 Promoter Group announced an incremental update 3.2 and this just a part of the USB performance roadmap and would be useful for developers.
  • A complete specification of USB 3.2 would be disclosed on USB Developer Days North America event in September 2017.
  • In order to benefit from this performance increase, a new USB 3.2 host must be used with a new USB 3.2 device and certified USB Type-C cable.