Yes Matt, This can happen to most all cmos devices. They are a "little more forgiving to day than in a earlier time but if you exceed max VCC or "spike" one then it's history. What happens internally is, there's a very thin layer of oxide used as an insulater. A spike or overvoltage can and will break down this insulater and cause (a)/or many transistors to short. This action causes a high current to be drawn through the device destroying it. that is what causes it to "cook it self". Always make sure that you have a good regulator for your projects. 5 Volt or what ever it requires. There's a lot of fun things that you can do with DTMF decoders. 73 AC0Y
--- In [email protected], Matt Krick <[EMAIL PROTECTED]> wrote: > > > [EMAIL PROTECTED] wrote: > > >is called latchup. That is what happens to an CMOS IC when you go > >out of MAXIMUM specs on VCC. > > > > This is the only CMOS IC I have had it happen on. Does it on all > varients, 202, 204, 22204 Mc141???. Yahoo! Groups Links To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
