USB 2.0 cable

  iqs 13:06 04 Sep 11
Locked

Hi,

I was wondering how long can a USB 2.0 cable be until performance is affected??

I'm aware you can daisy chain 127 devices using powered hubs,but I would sooner use one cable and no hubs.

Thanks

  onthelimit1 13:10 04 Sep 11

Max recommended length is 5 mtrs.

  Fruit Bat /\0/\ 13:12 04 Sep 11

In practice, the USB specification limits the length of a cable between full speed devices to 5 meters.

For a low speed device the limit is 3 meters (9 feet 10 inches).

When USB was designed, a decision was made to handle the propagation of electromagnetic fields on USB data lines in a way that limited the maximum length of a USB cable to something in the range of 4m. This method has a number of advantages and, since USB is intended for a desktop environment, the range limitations were deemed acceptable. If you're familiar with transmission line theory and want more detail on this topic, take a look at the USB signals section of the developers FAQ

How far away from a PC can I put a USB device?

With the maximum of 5 hubs connected with 5m cables and a 5m cable going to your full speed device, this will give you 30m of cable (see section 7.1.19 for details). With a low speed device, you will be able to get a range up to 27m, depending on how long the device's cable is. With a straightforward cable route, you will probably be able to reach out 25m or so from the PC.

  iqs 17:04 04 Sep 11

Thanks onthelimit1 ,and thanks again Fruit Bat /\0/\

Will go looking for A 5m cable tomorrow

cheers

Advertisement

This thread is now locked and can not be replied to.

Honor 5X review: Hands-on with the new budget phone from Hauwei's young brand

1995-2015: How technology has changed the world in 20 years

You can now publish data visualisations to the web from Power BI

Complete guide to Apple's campus 2, everything we know about the new spaceship HQ, plus: new drone…