SN74AXC8T245-Q1: What is the output rise time?

Thank you very much for responding to my post and the document to calculate rise times. 

Let me run this by you:

ROL = 0.7V / 12mA = 58.3 ohms

ROH = (3 - 2.3)V / 12mA = 58.3 ohms

TLH = THL(max) = 58.3 x 50pF x 2 = 5.83nsec.

Got it. But that is when the VCCA and VCCB are the same voltage, 3V.

How about when VCCA is 1.8 and VCCB is 3.3?

Should I refer to 6.11 in the datasheet?

Thank you very much,

Joe