Hello:

Could someone tell me where I can find Low-Power Schottky TTL Models For LTspice?

Thanks,

RS

 

Hello:

Could someone tell me where I can find Low-Power Schottky TTL Models For LTspice?

Thanks,

RS

If neither @Bordodynov nor the LTspice group at groups.io have them then they likely do not exist.

The closest equivalent would be the 74HCTxx libraries. At least when it comes to logic thresholds - allegedly.

ETA: The users' group at groups.io has a few LS parts in the files section.

 

See

 

See
View attachment 304926

What?

 

What?

I have shown that I have hierarchical models of a logic gate and a clocked trigger. A more specific question needs to be asked. And it is not clear why you need it. What is your purpose?

 

For most logic devices there are two kinds of models that you can aspire to use. @Bordodynov has kindly shown you a transistor level model of a 2-input NAND gate and a transistor level model of a D-type flip-flop; and you have the temerity to ask "What?" The nature of that one-word question is just plain rude! The other type of model that you might find is a behavioral model. These are often used in an analog simulator to produce faster results, but only in the behavioral sense.

 

For most logic devices there are two kinds of models that you can aspire to use. @Bordodynov has kindly shown you a transistor level model of a 2-input NAND gate and a transistor level model of a D-type flip-flop; and you have the temerity to ask "What?" The nature of that one-word question is just plain rude! The other type of model that you might find is a behavioral model. These are often used in an analog simulator to produce faster results, but only in the behavioral sense.

LOL. Stay out things that don't concern you!

 

LOL. Stay out things that don't concern you!

What's with the attitude?

 

LOL. Stay out things that don't concern you!

If it's no concern of the members of the forum, why did you post the question?

 

Antique LS-TTL logic was used 54 years ago.

 

Antique TTL logic was used 58 or 60 years ago.

But @Bordodynov's diagrams are for the much more modern LS series, which was introduced as recently as 1971.

 

Why would anybody use very old LS-TTL logic ICs today? I used Cmos logic many years ago.

 

LOL. Stay out things that don't concern you!

I refuse to comply with such a rude request. I intend to try to help you despite your petulance.

 

Why would anybody use very old LS-TTL logic ICs today? I used Cmos logic many years ago.

You of all people should know the answer to this one and it is the same reason that people still try to design audio circuits with the μA741 of which your oh so fond. ROFLMAO.

 

Didn't most of us start with vacuum tubes, then germanium transistors, then silicon transistors, then RTL, DTL, TTL and LS-TTL logic, then Cmos logic, then Mosfets?

 

Didn't most of us start with vacuum tubes, then germanium transistors, then silicon transistors, then RTL, DTL, TTL and LS-TTL logic, then Cmos logic, then Mosfets?

All of the above and then some!