How to know which I/O standard support Schmitt trigger function? - How to know which I/O standard support Schmitt trigger function? I'm using Stratix III, IV and V devices. Due to small glitch on PCB, I want to use the I/O with Schmitt trigger function. But I don't which I/O support Schmitt trigger function. Could someone please tell me how to find the related information? Thank you very much. Schmitt trigger: In the follow web, Stratix series devides don't support Schmitt trigger function. Does it right? I/O standards Definition (intel.com) Replies: Re: How to know which I/O standard support Schmitt trigger function? Hi AqidAyman_Intel OK. Thank you, AqidAyman_Intel, very much. Replies: Re: How to know which I/O standard support Schmitt trigger function? I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you. Replies: Re: How to know which I/O standard support Schmitt trigger function? Hi AqidAyman_Intel Thank you, AqidAyman_Intel, very much. I get it. 0.0... , Thank you very much. Replies: Re: How to know which I/O standard support Schmitt trigger function? Hi, Thank you for reaching out to Intel FPGA Community. As far as I concern, only Stratix 10 among other Stratix devices has the Schmitt trigger functions. You can refer here Do Altera device input buffers have built-in Schmitt triggers? which mentioned that t he Altera legacy devices that offer optional Schmitt triggers on the input buffers for user I/O pins are the MAX® II and MAX V device families only. Regards, Aqid Ayman