If you can't find this chip you might want to try a harmonic multipler
using 1N914 as a step recovery diode, you can multiply signals up to
10 Mhz this way.

Tim Wescott wrote:

I'm looking for a small handful of ICS501 (http://www.icst.com/) clock
multiplier chips to complete a couple of "Montreal Fox" boards
(http://www.qsl.net/ve2emm/pic-projec.../mfx501-e.html) for a friend.

Before I try to fast-talk a distributor or the manufacturer out of some
samples, does anybody have any of these sitting around, or know of a
catalog distributor in the US that may carry them? I'll be happy to pay
a reasonable price for two to five of them.

Thanks.