MobileWill lists some “important things” to keep in mind with regards to routing high speed signals for PCB layouts – many of which are just good pointers in general, with his eye specifically focused on observations from troubleshooting USB designs.
Recently I have dived into USB 3. Which compared to 2.0, is so much more sensitive to your PCB routing as I found through trial and error. I have seen many projects on the various blogs and for sale on the usual sites that don’t follow or even try to route correctly. With USB 2.0 for the most part you can get away with it and it will still work. To help save you some time, I would like to share my findings that should help prevent PCB re-spins just due to USB not working. This is by no means an exhaustive guide to high speed routing as there are plenty of application notes across the web for that. I will list a few at the end of this post that I found helpful.
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