开云体育

These are good questions.? I can't answer them without examining the models more closely.? But if it's true that there was no parameter named "VCC", then all versions of LTspice should have / would have complained bitterly about that and refused to run.? LTspice would not ever have substituted a different parameter, whether or not it had a similar name.

This was never the case. "VCC" is the required top level parameter in 74LVC1G, just as with 74HC and 74HCT etc.. If it is not set, LTspice (all versions) will set an error. If a top level parameter is not re-defined beneath the top level, its value will cascade down the hierarchy. Perhaps, it is this behaviour that has changed in 24.1? I haven't had the chance to investigate this further yet. This would represent a significant change in the assumed architecture.

--
Regards,
Tony