USB 5V to 3V level shifter

Does anybody know which level shifter is used for USB on the IESM cards? I’ve one marked with S229 an one with S22E, so I think it’s just a package marking and not the part number. Can’t find anything similar on the net.

Thanks in advance!

Look at the devkit schematics, and see what they use…

Thanks, found out that it isn’t a voltage translator at all, just some esd protection and the standard 22ohm resistors inside. Apparently only the USB 5V needs to be converted to 3v3 for the vpad-usb pin. The IESM datasheet confused me.