There is a good chance that the 74F series might do this - that is right near their typical max clock speed. I would bet that some of the latest CMOS families could do it, too (perhaps 74AC or 74LVC or 74AHVC). Another thing to consider would be a small but fast FPGA or CPLD. Finally, do you really need to count every cycle or could you prescale it? There are some GHz speed prescaler chips out there (do not know the part number off hand). Sean On Thu, Aug 14, 2008 at 10:47 PM, Rich wrote: > I need a decade counter that runs 120 Mhz or faster. It does not have to me CMOS. It could be bipolar. I would like to avoid ecl. Does anyone currently use a decade counter that fast? > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist