Need SPICE model for 555

[Paul Burridge]

Hi, fellow electronics experts,

Has anyone got a model for this timer chip? I've had a sniff around
Google but the only ones I've come across have all been inchoate in
some way.

Tahnks,

p.

 

[Jim Thompson]

As in "incomplete." BTW, it's gone midnight here now and the
temperature's still up around 70 degrees following a high of 95 this
afternoon. I'm gonna hit the sack. Don't expect to sleep, though. We
just ain't used to it! :-(

I know what the word means. Why do you say "incomplete"?

70 degrees? That's cooool ;-)

It's 108°F here right now (4:19PM), but the humidity is only 15%.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| Jim-T@analog_innovations.com Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

 

[Terry Pinnell]

Hi, fellow electronics experts,

Has anyone got a model for this timer chip? I've had a sniff around
Google but the only ones I've come across have all been inchoate in
some way.

Tahnks,

Try one of the following, which I use in CircuitMaker Pro. BTW, you'll
find this same reply in several of the 41 hits you'll get by entering
555 "spice model" group:sci.electronics.*
in google news.

*Sngl Timer (Macromodel) pkgIP8 1,2,3,4,5,6,7,8. pkgIP14
1,3,4,6,8,10,12,14. pkg:CAN8 1,2,3,4,5,6,7,8.
..SUBCKT X555 1 2 3 4 5 6 7 8
EREF 15 1 8 1 .5
GSOURCE 8 3 8 26 12.5E-3
GSINK 3 1 26 1 67E-3
VD1 8 27 DC .8
VD2 28 1 DC .85
VREF 30 1 DC 1.2
C1 29 1 700E-15
RREF2 30 1 100E3
RREF 15 1 100E3
ROUT 3 1 100K
R1 6 1 500E9
R2 2 1 500E9

=================================

*Sngl Timer (Component Model) pkgIP8 1,2,3,4,5,6,7,8. pkgIP14
1,3,4,6,8,10,12,14. pkg:CAN8 1,2,3,4,5,6,7,8.
..SUBCKT XUA555 99 32 30 19 23 33 1 21
Q4 25 2 3 QP
Q5 0 6 3 QP
Q6 6 6 8 QP
R1 9 21 4.7K
R2 3 21 830
R3 8 21 4.7K
Q7 2 33 5 QN
Q8 2 5 17 QN
Q9 6 4 17 QN
Q10 6 23 4 QN
Q11 12 20 10 QP
R4 10 21 1K

 

[Paul Burridge]

Try one of the following, which I use in CircuitMaker Pro. BTW, you'll
find this same reply in several of the 41 hits you'll get by entering
555 "spice model" group:sci.electronics.*
in google news

Interesting. I never thought of Googling for it that way. Must make a
mental note of it.
Ta for the model, BTW.

 

[Paul Burridge]

I know what the word means. Why do you say "incomplete"?

Because the models I've seen come with the caveat that they are;
usually some vague reference to unspecified characteristics of the
chip. I can't take a chance on that; it might be the bit I'm
interested in.

 

[Paul Burridge]

LTspice contains two 555 timers. One is an idealized macromodel
written in its own digital library (symbol name NE555) and the other
is a transistor level circuit in examples/Educational/NE555.asc

Thanks, Mike. I installed Win2kpro the other week and it wiped out a
load of applications stuff that I'm still trying to reserect on a
piecemeal basis. I imagine the LT libary got corrupted back then as
well. Still, it's about time I re-installed the latest available
d/load anyway.