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Altera_Forum's avatar
Altera_Forum
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15 years ago

can open-drain output bear voltage of 5V?

Hi there, I want to use 5V output but cyclone ii device does not support the 5V IO standard. I know that cyclone ii device can configed as open-drain outputs, can I pull the OD ports up to 5V? Is...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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Is there any risk to the FPGA device?

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You shouldn't do that, it's clearly beyond maximum ratings. You should at least implement PCI clamp diodes for the respective outputs.