In TXIN pin, do these CMOS inputs have their internal pull-up or -down resistors?
( Is internal resistor consideration required for external resistors?)
Because the characterristics name is pull-up current.
We'll consider pull-up or down to TXIN.
There is a weak 3uA pull-up on the TxIN pin to Vcc. This won't interfere with any external pull-up/pull-down resistors that are added.
Hope this helps,
Thank you for your reply.
We'll add the external pull-up for stability.