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What is the difference between USB 1.0, USB 1.1 and USB 2.0?

USB 1.0 can operate at 1.5 Megabits per second (Mbps). USB 1.1 allowed a maximum transfer rate of 12Mbits/second. USB mice and keyboards need only 1.5Mbits/s to function. That performance level is also named 'USB'. USB 2.0 has a raw data rate at 480Mbps, and it is rated 40 times faster than its predecessor interface, USB 1.1, which...

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Knowledge Base .: Products .: USB Products .: What is the difference between USB 1.0, USB 1.1 and USB 2.0?

What is the difference between USB 1.0, USB 1.1 and USB 2.0?

USB 1.0 can operate at 1.5 Megabits per second (Mbps).

USB 1.1 allowed a maximum transfer rate of 12Mbits/second. USB mice and keyboards need only 1.5Mbits/s to function. That performance level is also named 'USB'.

USB 2.0 has a raw data rate at 480Mbps, and it is rated 40 times faster than its predecessor interface, USB 1.1, which tops at 12Mbps. Originally, USB 2.0 was intended to go only as fast as 240Mbps, but then, USB 2.0 Promoter Group increased the speed to 480Mbps in October 1999.

You can use USB device with USB 1.0, USB 1.1 and USB 2.0 as long as your PC or laptop has USB ports, but USB 2.0 device transfer data at 480 Mbps on systems with USB 2.0 support only.
Article 64
Created 6-1-2005
Modified 12-1-2005
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