Anyone have an idea of how to properly (or simply) convert the outputs of a PIC so that they can interface with 4000 series CMOS logic? I tried searching the FAQ, but really couldn't find anything. Is it as simple as adding an open collector output pulled up to the voltage my CMOS 4000 logic is running at?? Any help appreciated. Thanks Dan -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu