Meaning of "X" in VN5E010AH datasheet
Question 1:
Usually, &quot;X&quot; means &quot;don't care&quot;. But in this case it means &quot;yes&quot;. So, you can leave OUT, IN, and CS_DIS floating (i can't see why you would leave OUT floating, though), but not CS pin.
Question 2:
Datasheet is unclear about it. I would put pulldown to IN an CS_DIS pins to be sure of their state.