Saturday 17 November 2018

usb c - Achieving 90R impedance for USB Type C on a four layer board


I have started routing the 90R controlled impedance tracks for the USB. I've got the information from the manufacturer to use a trace width of 0.22mm and trace spacing of 0.125mm to achieve 90R impedance. Could anyone help me with my doubts?


These are the images of PCB layer stack-up followed from ZOT enter image description here


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See the above-attached PCB layout image,




  1. Are all the yellow circled ground vias sufficient for the return current?

  2. Are the tracks far enough to avoid the crosstalk? As I have set the track spacing to 0.125mm as per the manufacturer instructions.


Please let me know if it is good to go. Thanks




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