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THerr9's avatar
THerr9
Icon for New Contributor rankNew Contributor
5 years ago

Current output capability of the CycloneIII I/O cell

I am not an FPGA developer, so please bear with me. I am designing a microprocessor circuit to emulate a 1-wire device connected to a 3.3-V LVTTL output of a Cyclone-III FPGA. 1-wire is a Maxim com...
ShafiqY_Intel's avatar
ShafiqY_Intel
Icon for Frequent Contributor rankFrequent Contributor
5 years ago

Hi THerr9,

Yes you're right. The 7mA is very unlikely to cause the damage as Absolute maximum ratings for DC output current are min -25mA ,max 40mA. Absolute maximum ratings are conditions that you should never be exceeded as it may cause damage to your pins.

However, for I/O standard 3.3V LVTTL, the current characteristic of IOL and IOH are 4mA and -4mA respectively. If you exceed our recommended value, it may not damage your pin but the functionality of this pin we can't guarantee. It's may or may not working properly. You can try on your own risk.

Thanks