current leak from an input pin

On data sheets and such what is the current that flows from an input pin referenced to ground called? On a level shifter input I measured 1.6v but im not sure why an input would output a voltage, unless that's a leakage of a high impedance output. From what I got its the IOZ current shown in datasheets but I'm not sure. Any info would be appreciated, thanks.

You don't give a link to the datasheet for the device in question.

https://www.google.com/url?q=http://www.adafruit.com/datasheets/sn74lvc245a.pdf&sa=U&ei=cWElVKSaFZG4ogTe9YCADg&ved=0CAsQFjAA&usg=AFQjCNH_tUwkpZHCyIO03KQXrbQEhLGZwQ

That one, its for 3.3v arduino due to 5v 8086 but I'm just curious what piece of info on there defines this behavior. Say if I set direction to A -> B the A pins still measure 1.6v when floating

I believe the IOZ being +-1 UA would mean that it will still sink and allow draw of 1uA. Would that charge an input to 1.6v?

That's a worst case, typical leakages are more like nA I'd have thought.

DMMs are usually 10Mohm inputs, so 100nA gives 1V reading. Or you can
use a current reading on the DMM directly.

Hi, what application do you have that needs to consider the current going to an input that is in the uA range.?

Tom...... :slight_smile: