LM324N vs LM324NJP and MC14584 vs 74LS14?

They both look like matching crosses, I just want to make sure though.

Thanks in advance,
Jeff

LM324N vs LM324NJP the 'JP' is probably a manufacturer code. The 'N' prefix is the packaging code (DIP) which looks to be consistent across manufacturers of the part.

MC14584 is CMOS IC and not a direct cross to the 74LS14, the characteristics are different, even if they are functionally similar.

- James
 
So, is a 74LS14 not the same as a 74C14 or 74HC14?

I can only get the 74LS14 locally and after doing a little research I came up with a few people saying that the MC14584 = 74C14 = 74HC14. I just ASSumed the LS was the same.

Wouldn't be the first time my research(and something I read "on the internet") was wrong. ;)

Thanks again,
Jeff
 
Good read, thanks!
cheers.gif
 
In some cases the JP, or other letter number combos will be the operating temperature ranges. Typically when there are more alpha numerics the high the range. Other times it's like Jrok stated, they are just used internally for the chip makers.

You should the things they add to the chips when making them, much less packaging. Sometimes they will be plant codes, date codes, or batch codes. To help quickly find batch problems etc in failing parts.
 
Ok, so my local parts store did have 74HC14 in stock... which should work, correct?

I found an reply by Mr. Spaeth on rgva.c that they will work so I'm thinking now that I have an "HC" I should be set.
 
What are you replacing? LM324 should be easy to fine, I have 27 in stock and im pretty sure its available from digikey.

As far as the jp prefix, one of those letters(probably the J) is likely the package such as plastic case or ceramic.

I have used HCT to replace LS with no problems. Results may vary by application. If I remember right, HC is ttl compatible cmos.

If you cant find what you need pm me and I can hook you up. Im heading out the door for a little mini vacation but will be back around monday.
 
Just for clarification, I'm working on a Centipede board. I already replaced the original LM324 that was damaged by a bad 7905 I installed on the ARII so I don't need one of those.

And the MC14584 is used for trackball control. I already have removed the old defective chip, I'm just waiting for the thumbs up on the 74HC14 being used as a replacement.

Thanks for the offer Riptor.
 
And the MC14584 is used for trackball control. I already have removed the old defective chip, I'm just waiting for the thumbs up on the 74HC14 being used as a replacement.

Oh yeah.. you'll be fine with the 74HC14 in that situation.

- James
 
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