I would caution against trying to think of it as a resistor or any other si= mple device. Read the data sheet, the leakage current spec is there. Assume worst case = and design around it.=20 Use high impedances where you need them, but avoid them as it lowers your s= ystem immunity. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .