I am working on a custom board for the PCDuino3 Core Computer on Module. The design for the reference board for this has bi-directional ESD diodes on every port that is likely to be touched. I am unfamiliar with this type of device, but would like to follow the reference design if possible, but the one the manufacturer uses is difficult to come by (the Semitel ESDPSA0402V05).
What is the criteria for finding a suitable bi-directional ESD protection diode for a 5v device like the PCDuino3c?
From what I have found after an hour or so of searching, I should be aiming for one that has 5v Reverse Standoff Voltage and 0.05 pF capacitance or lower to support high speed data rates. Can anyone confirm this?