> I'm not sure everything can handle the 10Mhz signal. Bingo.
LM339 (National data sheet) Response time: 0.5 us CD4049B/CD405B (from TI data sheet) Rise time is 80 ns Fall time is 30 ns Those are typicals at 5 V with a 5V input signal. The LM399 says "low power" which usually means low speed. I occasionally go "oops" when I sanity check the speed on a circuit I'm about to build using HC/LS parts. They aren't very fast, and the old 4000 logic is even slower. 10 MHz is about the corner for HC. I use the HC163 (4 bit binary counter) as an example. It has a max clock frequency of 25 MHz, so you think "no problems" at 10 MHz. But the setup times are 30-40 ns and the clock-out are 40-50 ns so doing anything interesting at 10 MHz gets tight. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
