I am making my first PCB with multiple USB differential signaling. Is there anything to improve? Specifically do I need to have the signal traces at a certain distance from each other? Ground fill is invisible in the screenshot.
#Noob at PCB design
shrewd sand
The differential traces look okay, but is there a particular reason for the two usb traces to cross over each other? If not, I would avoid crossing the USB ports across layers like that on a 2 layer board.
Also, usb ics usually recommend a termination resistance of somewhere between 22 and 33 ohms on the d+/d- lines. I’d double check the data sheet and see if there’s a recommendation in some form of application notes.
smoky wing
The differential traces look okay, but is there a particular reason for the two ...
This made me think about the traces crossing over, switched around the schem and PCB and it looks much cleaner without the traces crossing. For the resistors, the lines are pulled to VCC, ground, or each other?
shrewd sand
Should be inline resistors, not pull down or pull up
smoky wing
Should be inline resistors, not pull down or pull up
https://electronics.stackexchange.com/questions/188715/usb-hub-and-slave-on-same-pcb-are-serial-resistors-and-capacitors-needed Like asked here?
shrewd sand
Yep, something like that.