Timeline for Polarity of USB common mode choke
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 2, 2015 at 15:28 | answer | added | Ulminpoika | timeline score: 3 | |
| Nov 24, 2015 at 19:23 | comment | added | Anthony | @ChrisStratton I tend to agree with you, but the nature of a coupled inductor, which is what the datasheet pictures and descriptions suggest is inside the IC, would lead me to believe it may not behave symmetrically if the data lines are swapped. As an aside, I don't see how swapping the data lines helps routing in anything other than the most trivial sense, but I digress. | |
| Nov 20, 2015 at 20:10 | comment | added | Chris Stratton | The AC USB signal is differentially bipolar and the DC pullup can be on either side depending on device speed, so it's hard to see how the filter could care. | |
| Nov 18, 2015 at 10:04 | history | tweeted | twitter.com/StackElectronix/status/666919865039630336 | ||
| Nov 18, 2015 at 9:46 | comment | added | Autistic | I am squeamish about a polarity reversal. | |
| Nov 18, 2015 at 2:17 | comment | added | got trolled too much this week | I also think it's fine. You could also ask on the ST forum, just in case... | |
| Nov 17, 2015 at 23:37 | comment | added | David | There does not seem to be anything in the datasheet which would indicate this is a problem. The internal schematic looks symmetrical. However there is nothing saying it's fine either, so test it and see. | |
| Nov 17, 2015 at 23:21 | history | asked | jsmith | CC BY-SA 3.0 |