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Honored Contributor
Honored ContributorCan an external pull up on an open drain pin go to a voltage greater than VCCIO?
Can an open drain pin be pulled up externally to a voltage greater than VCCIO (but less than the absolute max...)? My Cyclone III INIT_DONE is on a 1.8V bank but I need to interface with a 3.3V LV...
Altera_ForumHonored Contributor
Honored ContributorI found an indirect answer on their answer database
http://www.altera.com/support/kdb/solutions/rd06292008_741.html It basically stated that it will work as long as they are below absolute max Vin. But this was for Stratix III. Pete
