topic Re: 555 timer spice model simulation in EAGLE Forum (Read-Only)

555 timer spice model simulation

Anonymous — Sun, 19 Apr 2020 07:02:57 GMT

Hey Team 🙂

Been trying to simulate a NE555N IC not been able to find a spice .mdl model to use. anyone have a model 🙂

cheers

Emanuel

kskoeld — Sat, 01 Aug 2020 11:06:37 GMT

Having the same problem finding something for the NE555P

thomasedwardwilk — Thu, 08 Oct 2020 20:01:13 GMT

Same.

I am considering just modeling it from the subcomponents, but it seems a .mdl file should be available.

ray.jenson — Wed, 06 Oct 2021 01:38:02 GMT

A year on, and still no .mdl file for any 555 timers that I can see. Are they really that complicated? (Legit question, no snark.)

holger.vogt — Mon, 11 Oct 2021 14:51:15 GMT

mdl files are spice model files. So search for a spice model of the 555 and rename it to Timer555.mdl.

A spice model used with ngspice can be found in the example file https://sourceforge.net/p/ngspice/ngspice/ci/master/tree/examples/p-to-n-examples/555-timer-2.cir. You need to copy the subcircuit beginning from

until and including

.ends,

put it into file Timer555.mdl, and that's it.