Hi team,
According to the datasheet layout example
The USB2.0 and SBU lines must be routed as straight as possible and any sharp bends must be minimized.
but my customer SBU line do not straight, is ok with that?
The same situation in D1/D2
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Hi team,
According to the datasheet layout example
The USB2.0 and SBU lines must be routed as straight as possible and any sharp bends must be minimized.
but my customer SBU line do not straight, is ok with that?
The same situation in D1/D2
Those routes look fine to me.
They just need to be differentially routed and impedance matched to the specifications of the bus interface being used. The SBU lines can be differential and high speed in some cases.
Hi Chuck,
I heard the high speed signal need to less 5mil, right?
How to check the impedance matched by layout?
Jason
Hi Chuck,
For CC line,
They use at least 4 via on the trace, do you think this is ok?
Jason
Jason,
Impedance control is done through 2 methods: 1. You configure the PCB layout tool to generate a 90 ohm differential trace using the tool and 2. You can work with your PCB vendor to adjust the board construction to create the target impedance.
The 5mil trace you are describing might be a rule from the PCB vendor. I frequently use 6 and 8 mils, but on some high power boards with very thick copper, I have had to use up to 10mil before.
Regards,
Chuck
Hi Chuck,
I got it.
For CC trace via, I mention it before, do you have any suggestion?
Jason
Jason,
The CC trace can carry up to 600mA of current as long as they trace and VIA combination does not show too much loss, I don't se any issue with this layout.
Regards,
Chuck