USB 3.0 News Summary

USB 3.0 is coming

Martin Rowe, Senior Technical Editor m.rowe@tmworld.com -- Test & Measurement World, 10/1/2008

USB flash drives such as the Kanguru FlashBlu now hold up to 64 Gbytes of data. Courtesy of Kanguru.

With 64-Gbyte flash drives and terabyte external hard drives now available, USB 2.0 has become a data bottleneck. USB 3.0, with its 5-Gbps bit rate, will change that. If you plan to develop USB 3.0 products and you’re not currently testing other high-speed buses such as PCIe (PCI Express) Gen2 or SATA-3 (Serial ATA III), start making a case to your manager for a faster oscilloscope.

USB 3.0 will leverage technology from PCIe Gen2 (5-Gbps) and SATA-3 (6-Gbps) serial buses. It will use 8b/10b data encoding, which reduces the data throughput rate to a maximum of 4 Gbps. “In practice,” said Mike Engbretson, USB test solution marketing manager at Tektronix, “the data throughput may be around 3 Gbps.” Still, the 5-Gbps bit rate is more than 10X faster than USB 2.0. (Click here to read a discussion with Engbretson, covering USB 3.0 technology in more detail.)

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