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DS92LV010A: pull up resistors

Part Number: DS92LV010A

Team, 

My customer has the following questions:

Is there a weak pull up/down within the DS92LV010ATM device on the RE pin? 

If pin 5 (RE) is left floating, what could be the behavior of the part or would there be any significant impacts of this omission?

Pin 3 which is the output of this chip controlled by pin 5 is currently not connected to anything in the circuit. 

Thanks, 

Aaron