gunrunnerjohn posted:You obviously didn't see my much simpler board to address the issue. The Gerber files and schematic are attached. I do these in .031 thick boards. You simply glue this to the top of the ACT244 with the large TVS down and run the four wires from the indicated connections to the matching pin of the ACT244. The large TVS diodes is across the power/ground, and the four Schottky diodes couple the voltage limiting to the pins while limiting the stray capacitance from the TVS.
Obviously, you orient this board so that the connections on this board line up with the IC pins!
MTH TIU Signal Protection Gerber.zip
It seems like everybody is overlooking a key benefit of John's solution.
"Schottky diodes couple the voltage limiting to the pins while limiting the stray capacitance from the TVS."
