02-08-2018 03:42 AM
Hi,I have a Cyclone V that needs to be able to briefly source and sink current ~60mA for 1 to 8us before returning to the microamps range. I see that the IO pin max ratings are -25mA to 40mA. Given that I'm outside the range even for a short amount, can I use two IO pins and connect them together in order to achieve a greater current amount to sink or source i.e. summing the currents to get -50mA to 80mA?
02-08-2018 10:38 AM
It is difficult to guarantee that the current will be split evenly between the two pins. You could end up with more current on one pin than on the other. Check also if there is a limit on the full I/O bank current.I think it would be more reliable to use an external buffer or a little transistor to do the job.