The NE555 model included with LTspice is an idealized behavior model that doesn't accurately model all of the real device's characteristics, such as output voltage.
Attached is an old Fairchild uA555 transistor level model with pinouts modified for use with the attached LTspice symbol.
It should, in general, give more accurate simulation results (but no guarantees).
The .sub file goes in the LTC\LTspiceIV\lib\sub directory.
The .asy file goes in the LTC\LTspiceIV\lib\sym\Misc directory.
Close and reopen LTspice to make it available.
You may have to "Skip initial operation point solution" (uic) in the Simulation Command window to get it to start up readily.
Attached is an old Fairchild uA555 transistor level model with pinouts modified for use with the attached LTspice symbol.
It should, in general, give more accurate simulation results (but no guarantees).
The .sub file goes in the LTC\LTspiceIV\lib\sub directory.
The .asy file goes in the LTC\LTspiceIV\lib\sym\Misc directory.
Close and reopen LTspice to make it available.
You may have to "Skip initial operation point solution" (uic) in the Simulation Command window to get it to start up readily.
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