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Altera_Forum's avatar
Altera_Forum
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12 years ago

MaxV IO voltage compatibility

Hi everyone, I am working on a MaxV design that needs IO compatibility with ICs that will be powered from 2.3V. Looking at the MaxV datasheet and the pin configurations in Quartus I am led to ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Hi:

Although you can run your IO at 2.3V, using the 2.5V settings, you will be out of spec. (Or at the low extreme of the spec). This would mean that although it will probably work, it really depends on what you are connected to. If the other device has CMOS inputs (VS LVTTL) and is also running on the 2.3 supply you are probably OK, but just de-rate your timing requirements a bit in your constraints.

The timing models are for min/max voltage/ temp /process corners.

Pete