On Jan 23, 2008 3:56 PM, Rob Robson wrote: > I'm looking for recommendations for a single-package solution to interface a > PIC to an outside-world serial port. I have +/-18V supplies available, so I > don't need a charge pump device like the MAX232 (and it's extra caps). The > TI SN75155 would do the job, but it costs more than the MAX232 does, and > this is a cost-sensitive project. Any ideas? Mc1488 and 1489 are the classic parts if you have bipolar supplies. You can use transistors... -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist