[email protected] said: > Let's say I have a 20MHz TCXO. I want to square up the output signal and > divide by two. Easy, just a buffer or inverter and a flip flop. But looking > at the pinout of the 74LVC1G175 (D flip flop) it doesn't have a Q not > output. So now I need a second inverter to make it toggle. The 74LVC2G14 > includes two schmitt inverters in the package, but will isolation inside the > device be good enough to use it for two separate functions at 20 and 10 MHz?
The simple answer is to use the 74LVC1G74 which has the inverted output. The complicated answer is more complicated. What are you using the inverter for? Clock or data? If both halves are used for data and there is plenty of setup/hold time, then the timing through the chip doesn't matter. If you are using it for a clock, then things get interesting. Is there a fixed phase between the 2 signals? If they never change at the same time, it probably doesn't matter. (How close counts as "same" might get interesting.) If they do, how nutty are you feeling? If it mattered, I'd probably do something else. The simplest something-else is to use 2 packages. -- These are my opinions. 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.
