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...

Back to Store

Firewire IEEE 1394 Products

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
Author	support
Rating
Print

What happen if a USB 2.0 device is plugged into a USB 1.1 system?
The entire bus under the USB 1.1 root hub will slow to 12Mbps. The operating system will probably notify the user...

6-1-2005 Views: 621

Will USB 1.1 devices run any faster on a USB 2.0 bus?
No. However, the new USB 2.0 archiclecture allows more high-speed USB 1.1 devices, such as webcams, audio devices, to...
(No rating) 6-1-2005 Views: 557

Do USB 1.1 cables work with USB 2.0 devices?
Ideally, yes. USB 2.0 architecture uses the same cables and connectors as USB 1.1 compliant products.
(No rating) 6-1-2005 Views: 663

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

Related Articles