pmtwiss
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Hey Guys,
Making a wuick test board using Advanced Circuit's $33, 2-Layer Board special.
here are some of the specs:
- 6 mil trace / space minimum
- 15 mil drill minimum hole size
I need to route USB on this board, but it is a simple 1oz copper 2-layer board. Thus from bottom layer to top layer is ~59 mils. By my calculations, in order to meet 90-ohms differential and adhere to their rules for this cheap board, I have to route a differential pair of 6 mil spacing and 40mils wide each trace.
I checked and checked again(used Saturn, and another internet calculator), and it seems right due to the fact that the plane under is 59 mils away.
Has anyone done this before? Just checking before I do it...
Thanks,
-Peter
Making a wuick test board using Advanced Circuit's $33, 2-Layer Board special.
here are some of the specs:
- 6 mil trace / space minimum
- 15 mil drill minimum hole size
I need to route USB on this board, but it is a simple 1oz copper 2-layer board. Thus from bottom layer to top layer is ~59 mils. By my calculations, in order to meet 90-ohms differential and adhere to their rules for this cheap board, I have to route a differential pair of 6 mil spacing and 40mils wide each trace.
I checked and checked again(used Saturn, and another internet calculator), and it seems right due to the fact that the plane under is 59 mils away.
Has anyone done this before? Just checking before I do it...
Thanks,
-Peter