I've never had to specify the loading capacitance for a crystal before, so I need to ask for some help on reading the data sheet. This is the link to the DS on Mouser: < http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=563316 > The part specifies B2 capacitance for the 50Mhz crystal, and a B2F for the 25Mhz I need. Both are from the same company and have the same data sheet. Any help? What is the B for? Does the two mean I need twice the cap. of the crystals value? -- Shawn Wilton (b9 Systems) http://black9.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist