If you can manufacture a cable that has such a low loss over ns of wave propagation that it can deliver an open signal eye meeting USB far-end template, a host with a single USB device can work with it.
Taking 26 ns per 5 m, it comes down to m of cable. This is the maximum theoretical limit. I'd love to see if this kind of cable can be made.
Personally I had a good no-error link with 40 ft 12 m cable made of Cat 5e. However, there is another functional limitation on the maximum cable length in USB: it is related to high-speed disconnect function. The HS disconnect in USB is based on an idea that a disconnected cable would reflect the signal back, so the reflection adds up to the driven voltage leading to doubling of signal amplitude at the transmitter.
If the USB cable is disconnected at host port, no problem. But if a device with its termination is disconnected at far end of a long cable, the reflection must come back within 83 ns, the amplitude will double up, and a special comparator in the PHY receiver will register the "HS disconnect" condition.
This sets the cable limit of having Assuming 6" propagation speed per 1 ns, this requires the cable to be less than " long, or about 6. This limitation takes place only if you want to sense a clean and fast disconnect.
With longer cable the host port will be eventually disabled due to protocol error, so not much problem at the end. According to USB specifications , cables longer than 5 meters would cause a too large signal propagation delay to work. I've had no problem using any USB device over this cable. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Learn more. Maximum length of a USB Cable? Ask Question. Asked 12 years ago. Active 9 months ago. Viewed k times. What is the maximum length of a USB cable? What is the maximum length achievable when using USB extension cables?
Improve this question. Gaff Click Ok Click Ok 3, 9 9 gold badges 41 41 silver badges 43 43 bronze badges. As an alternative, there's a 10m wireless USB option. Add a comment. Active Oldest Votes. Improve this answer. WAF 5 5 bronze badges. Just FYI, it's not really a timing issue, since using hubs doesn't mitigate the signal's propagation time. If the cable was too long, the digital logic levels might not be triggered properly at the receiving end.
So how long can a USB-C cable be? It dictates that USB 3. Though not widely used for data transfer, USB 2. For Thunderbolt 3, generally speaking, the maximum length of a passive Thunderbolt 3 cable is around 0. Of course, you may be wondering what actually happens if a cable is too long. The reality is that you may have cables that are too long without ever even realizing it — especially if you really only use your cables for charging.
A cable with an electronic marker can even support charging up to W. At long distances, your USB cable may still supply power, but as the distance gets longer, your data transfer rate may get lower and lower - and at really long distances, you may not be able to transfer data at all.
Eventually, even power delivery will fail too. In other words, as the cable gets longer, its ability to work as intended will fail - which is exactly why you should purchase cables that are USB-IF certified, or at least within the recommended USB guidelines and from a reputable brand such as Cable Matters.
Active USB-C cables can come in handy when you need something with faster speeds and 4K videos that are longer than 1m. Will this work on a PS4 wired fightstick? Kerry D on Feb 14, Will this work for a web based phone from a thin client set up to headset? A shopper on Apr 11, What tip size do I need to add a 5 volt 2 amp power supply?
Michael P on Mar 23, Questions For Similar Products. Review More Purchases My Posts. Rated 5 out of 5. Ran it for a USB hub in one room to connect to my computer in another through the wall, and it works great! Build quality is good and no connection issues, so I'm super pleased. September 23, Mark V. Purchased 2 months ago. Response from Monoprice. We really appreciate the time you took to write a review!
Thank you for choosing Monoprice. August 20, David C. Purchased 3 months ago. Cable is of high quality. Used to connect a telescope-mounted camera to a computer. Camera sends 33MB files to PC every second or every few minutes, depending on commands. No issues receiving the images or sending commands to the camera. Very satisfied with the cables. Highly recommend. May 25, Purchased 7 months ago. Used to Extend Mouse and it Works Flawlessly.
April 2, Nick L. Purchased 8 months ago. February 22, Dennis D. Purchased 9 months ago. Works great with USB microscope. Very clear images. December 29,
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