Yeah, does chips that are like HEF4049, or HCF4093, are the same thing as CD4049 and CD4093?
Datasheets are your friend. Datasheets ftw!
Indeed they are. Shame on me. Gonna have a look at 'em now...
The reason I posted here was because I thought they were like equivalents, I mean, European/American equivalents, like ECC83/12ax7, but that's just plain stupid.
Yeah. This one is kind of tricky. On the one hand it normally doesn't have much to do with American/Euro/Asian standards. On the other hand, it's worse.
First, with ICs, transistors are a whole 'nother matter, you are pretty safe to assume that a difference of only PREFIX simply denotes different makers (Suffix generally denotes package and/or selectivity within a part run; CA3080 vs. CA3080AE, for example; the latter has a tighter offset spead). This difference in prefix only, where the same part, generally a 'general-purpose' type, is made by two competeing manufacturers, is called 'second sourced' and is in fact a benefit to marketing the part because a potential customer, say the military, will know that if Company A folds, Company B will still make the chip that gets the $2B aircraft off the ground so they won't have to scrap an entire fighter wing over $1.39 of silicon.
In theory, they are supposed to be electrically the same chip. In theory. Best to get a couple and test one or two to make sure.
Second, the above works as a 'first guess' and is best to use only with the numbers you recognize. Even if you do recognize it there are a few more traps you could fall into. Besides the obvious 'Replacement' lines like ECG and NTE, there were at one point or another lines also from GE and RCA/(someone I don't remember) with the prefixes of GE and SK, respectively. Don't know about the GE chips but the SK ones don't match up to the 'real' numbers. Though sometimes they do - in the cases of their own original part numbers.
Which brings us back around to the best answer: look up the datasheet.
For me, the most comprehensive site is: www.datasheetarchive.com
It only allows 20 per day but it is thorough.
Regards,
Jay Doyle
Thanks... it's just that I found a box that has like 20 chips. I never cared for them, because I only saw HEF and HCF, so nothing for me. However a couple of days ago I took that box out and began to read the rest of the IC codes :icon_lol:
Oh, these are actually useful.
So kids, read the whole code. Not just the first 3 letters.
I think that by and large (translate that into Spanish!!!), a CD prefix will always do the job in effects circuits.
QuoteCreo que en general, a CD prefix will always do the job in effects circuits.
Ah, much better :icon_lol: :icon_lol:
The prefixes refer to different types of construction.
Which influences the power ratings, logic levels, speed of operation etc.
Read all about it here: http://en.wikipedia.org/wiki/Logic_family