Importing a SPICE model (74ALVC16244A) into Multisim

[Tien_P]

Hi,

I think some of these tutorials may help you to create your own parts:

Creating a Custom Component in NI Multisim

How to Import SPICE model in Multisim

How Can I Create a Component in Multisim with Duplicate Pin Names?

Once you created the model and if you have a problem post your circuit with the component placed, I can look at what you did and provide details what went wrong.

[Tien_P]

Multisim have inverters available and you should use the one from the CMOS database.  Have a look at this knowldege to set the voltage to 3.3V.

http://digital.ni.com/public.nsf/allkb/C2BCB5B0671D888586257AD800598519

The "Ltpkps.txt" file you posted doesn't look like a inverter model, the model only have resistors and inductors. 

[ljhconan]

Thanks very much!

I appreciate your help.

[ljhconan]

Hi,

When I do the transient simulation for inverter. My input node is 1, output node is 3. But in the simulation analysis I can just find D(3) instead of V(3) for output. It seems the simulation plot converted the analog into digital automatically. What should I do if I just want to see the real output voltage instead of digital signal?

Thank you very much!

Best,

ljhconan

[ljhconan]

Hi Tien P.

I made the inverter component from component wizard.

Firstly, it seems there are 6 pins (including 2 hidden pins) on this kind of inverter based on the model file. So I used a typicall inverter model and added two pins. Then there poped out a bunch of error messages.

Secondly I ignore the two power pins by just using typital model (4 pins), still got errors.

This model file should be correct because my friend got it work by using LTspice. So things must go wrong when buliding the model.

Have a fun holiday.

Best,

ljhconan

[Tien_P]

Hi,

This model is a complex model and it's calling other models that you did include. For example, this line:

XQQ136 110 111 109 IGND HV38STSBDETCNW

Anything that begins with X is a call command in SPICE and in this case it's looking for another circuit model called HV38STSBDETCNW. Somewhere in this model you should see a line that looks like this:

.subckt HV38STSBDETCNW node1 node2 node3 node4

Since the HV38STSBDETCNW doesn't exist, Multisim will give you an error. This model is calling a lot of different models so you have to include them all. If you can get the LTSPICE circuit from your friend, you should be able to get the complete model.

[alirajab1947]

 how to find spice model for a component ( LM2577-ADJ ) to create this component in multisim

ALI RAJAB

thanks 

[RichieTheBard]

Hello Alirajab,

To find the spice model for a component, I'd recommend you look in the manufacturers website and see if it's available, if not you'd have to look for it in other places online.

Also for future cases I'd ask you to create a new thread instead of reusing an old one to ask your new questions.