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Altera_Forum
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12 years ago

Can 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_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I agree. I looked through the handbook, and couldn't find any reference that stated if it was ok to pull it above the VCCIO of the bank in open drain mode..

Pete