We are using a I2C mux part (they make them), and the I2C app's notes say that you only need to mux the data and not the clock. If you need the part number let me know, but should be able to find it on the Phillips website. I don't have the schematic right in front of me at the moment. _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.