spice model for counter?

I never managed to find a counter model to run under LTSpice. I did put togheter a simple counter once, using the LTSpice D-flip-flops and logic gates

but it was a PITA.

If 4000 series CMOS is dead, nobody has told Farnell - they list pages of the stuff from Fairchild, Philips, TI, ST, and ON Semiconducter, who seem to be similarly ill-informed.

Since 4000B CMOS runs at supply voltages from 3V to 18V, it can be very handy in simple circuits.

PICs and Basic Stamps can replace 74 series logic in some applications, but they are strictly serial processors. If you need parallel processing, programmable logic devices are a more fruitful alternative.

-- Bill Sloman, Nijmegen

Have you checked out the LTspice group at Yahoo

In the Files section there, one can find the models (& symbols) for many CD4000 devices, including counters.

-- Andy

Thank you Bill. I kept seeing things that say 4xxx shouldn't be used in new designs but they never refered to what should be used. I was getting concerned that the electronics world was going to obsolete everything by the time I learned about it.

Yes, I did check but I was only looking for 4029, 4510, or 4516 at the time. After reading your reply I found that they do indeed have other counters. I finally downloaded the cd4000 files and figured out how to use them. I am working with the 4017 now but I still wish the 4029 was available so that I could count down. Maybe I'll find a way to edit the 4017 into a 4029 but I think that is probably beyond me right now. Maybe I'll ask at Yahoo.

Thanks, LL