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Altera_Forum's avatar
Altera_Forum
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14 years ago

Driving LEDs from 1.8V outputs

Hello, I need to drive some LEDs from the 1.8V outputs on my Arria II GX device. The plan is to simply connect the LEDS to 3.3V (through a resistor) and make the ouptut open drain. Will this ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

The output can stand up to 3.6V but why risk it. Can’t you reverse the polarity of the LEDs and give a ground signal from the controller. That way the LEDs will work at 1.8V when you give them a ground signal.