On 1 Mar 2008 at 1:35, Michael Lee wrote: > For small amounts I use Jameco Electronics... Where does one go to find the not-very-common TTL? e.g., the 7497 rate multiplier; the 74199 8-bit register, etc. TI had some pretty estoteric circuits also--74LS362, 74LS444, 74S485, 74S481... Cheers, Chuck