Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Rise fall time I/O LVTTL EP2C5T144C8N

Hello forum members, I am currently in the process of designing a PCB with the EP2C5T144C8N but am facing uncertainties regarding the rise fall time of the I/O (as output). The reason I want ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Hello FvM, thank you for your helpful post. +1 rep

My traces are 2.5 cm long so with a rise time of 0.5 ns I figure that I don't necessarily need to treat them as transmission lines.

However seeing as my design already uses source side series termination I'll just change their value to match the impedance

of the traces (70 Ohm).

Thank you very much!