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4029 CMOS Answered

I heard they are discontinuing the 4029B CMOS decimal counter, I know I haven't been able to find it anywhere recently. So my question is, is there a replacement for this chip? (CMOS)


Who is "they" ? I can't for the life of me see ALL the manufacturers giving up on a stunningly useful piece of logic.

Certainly TI and ON, who I can check at Farnell's website are still available.


I guess that some stockist or other has said they aren't going to carry it. I doubt that discrete logic will ever die, its too useful.


Well, _someday_ programmable gate arrays will be so ubiquitous that it's cheaper to sell them, and macros for programming them, to the hobbyists.

But for now -- yeah. I can see one manufacturer deciding a given chip wasn't worth producing, but that means more market for the others. I can certainly see one supplier deciding it wasn't worth stocking, but again that may just mean you have to shop around a bit more... and the folks who stock _everything_ are more likely to get my order when I need a random assortment of stuff, since it's easier for me to place a single order than to buy stuff from multiple places.

Show me a CPLD that can run on what CMOS can, and I'll beat a path to your door...

Hm. My degree claims I'm an EE, and my first job *was* circuit design for a supercomputer (never marketed, alas, partly because it was based on bipolar just at the time when CMOS was taking over)... I doubt I've got the chops for it, but that's an interesting challenge.

From my acquaintance with 'em, these things have been designed for rip-roaring speed, and not economy. CMOS is lovely stuff for efficiency.

One of CMOS technology's huge advantages is that it can be run for either efficiency *or* speed depending on how much work you want to put into cooling it.


7 years ago

that is why their prices are getting high, what a tragedy