Forum Discussion
CLa_R
Occasional Contributor
Occasional ContributorProtection diode for FPGA IO pins
Hi to all. For my project I am using a Cyclone IV-E FPGA. The lowest input voltage on its IO pins is -0.5V (as showed on Altera datasheet). I have many input that can be lower that -0.5v (around -...
Hi,
Both scheme holds good for your design.
Refer table 6-2 for impedance details.
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-iv/cyiv-51006.pdf
Regards
Anand
CLa_ROccasional Contributor
Occasional ContributorI'm also trying this scheme, which uses a N type MOSFET.
Which is the best solution?
Also, what is the input impedance of IO PINs of the FPGA?
AnandRaj_S_IntelRegular Contributor
Hi,
Both scheme holds good for your design.
Refer table 6-2 for impedance details.
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-iv/cyiv-51006.pdf
Regards
Anand
