Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
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

Thanks Pete. The associated threadery reinforced your inference. You'd think they'd be a little more plain about it in the datasheets, though.

Tweet