From: "Dan Michaels" > 4066s are CMOS and thus subject to ESD. One possibility is adding > transzorbs with a small series R at the input and output pins of > the board Are those Transient Voltage Suppressors? I tried looking in the Digikey catalog for such devices and that's what I came across, never heard of them until today. If so, what kind of rating would I be looking at for this type of protective application? I feel like I suddenly don't know anything anymore, is this what everyone else felt like on their first day of college when they'd be asking what the point of a series circuit is and I'd be shaking my head in disbelief? -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.