Are the output pins safe to be pulled up to a voltage other than VCC that is below 5V? In particular, I am concerned about having a pull-up on the output signal since I was going to use it as an open-drain device (grounding the input pin and using the output enable pin to control the output). Will the pull-up resistor back drive into the SN74LVC125A's Vcc when the buffer is not yet powered?
On a related note, I would expect that in this configuration I should only get an output of GND or high impedance, but I think that I am seeing the output being actively driven high as the buffer's power supply is coming up, but it may be from a different source.
