I quote the datasheet then hear "If you try reading the datasheet"
I do love EE... Not exactly dealing with FPGA's here but lord help you if you can't grasp everything even in the Beginners Forum.
For the record I'm learning as I go and there is plenty to learn.
In my head I was more worried about voltage than current since the input voltage in my case can vary I can't just use any old current limiting resistor. I had assumed as long as my voltage was within the tolerance of the LED input side it should work as expected. I was not sure on the output but assumed the same thing.
I know this is a stupid question and every expert will tell me to just RTM or go to collage but if someone has a moment I'm still not grasping why I would need an input resistor, I can hook an LED across the pos and neg without any issues, why in this case would I need it if the LED is 1.5 volts and I apply 1.5 volts?