I have a need to distribute a single RS232 port (TXD, RXD, GND only) to one of four peripherals depending on certain conditions. This would be to ONLY one at a time. My idea is to use a 4052 multiplexer to do this. This devioce is a dual 4 port multiplexer and I would configure it with the TXD on one port and RXD on the other and then, using the S0 and S1 select lines, to distribute the signals to the desired output. Is this a feasible thing to do? If not, is there a better solution that is doable? Any enlightenment will be appreciated. TIA Vic ________________________________________________________ Victor Fraenckel - The Windman victorf ATSIGN windreader DOTcom KC2GUI -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist