Serial resistance USB data lines

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Anonymous
Not applicable

Hi,

is a serial resistance of 22R in the USB data lines (D , D-) mandatory?

Because we have a design without the 22R resistors and it works well. Now we want to know if we have to do a redesign to implement the 22R resistors.

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Vison_Zhang
Moderator
Moderator
Moderator
First comment on KBA 750 replies posted 250 sign-ins

For mass production, i think you should add the series R.  It's terminal matching resistors, the role is to eliminate the signal overshoot and get a better eye diagram.

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Vison_Zhang
Moderator
Moderator
Moderator
First comment on KBA 750 replies posted 250 sign-ins

For mass production, i think you should add the series R.  It's terminal matching resistors, the role is to eliminate the signal overshoot and get a better eye diagram.

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