Flip-Flop in LTSpice, set/reset assertion?

Joerg · 2019-09-21T14:48:49+00:00

Today I found that a simulation wasn't working right because the set and reset on the flip-flop (dflop) in LTSpice has the set and reset inputs active high. Yet every modern flip-flop is active low. So I had to invert everything on those inputs just for the simulation. The "Special Functions" instructions in LTSPice are silent about this issue. Does this date back to the days of Methusaleh or what could be the reason? Connecting unused AND gate inputs to terminal 8 as per instructions also did not work but that was easy to figure out. -- Regards, Joerg