> You may like to look at the maxim/Dallas DS1251 which > is a 512k byte battery backed SRAM with phantom clock Nice idea Alan but............ I'd priced the DS1245 (1M) previously at $51 inc tax so I had an inkling of what to expect in the way of cost. As of this morning the DS1251 at Arrow is $271 inc tax, MOQ 10 pieces, 5 month lead time. With all due respect, I'll pass on that thank you -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics