Old stock of opamps, do they degrade ?

Discussion in 'The Projects Forum' started by Circuitfreak101, May 8, 2016.

  1. Circuitfreak101

    Thread Starter New Member

    Apr 13, 2016
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    Clearing through some old parts bins at work I came across a load of old SIL opamps, Mitsubishi M5218 ... quite a few of them

    The date of the packet reads 1986, will they have degraded in any way over time ? how are they in comparison against something like an NE5532 for general use ?
     
  2. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    Just compare the datasheets.

    Bertus
     
  3. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    Not much.
     
  4. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    I've certainly degraded since 1986 :D.
     
  5. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    I would guess that is true. Op amps may or may not be like wine.
     
  6. dl324

    Distinguished Member

    Mar 30, 2015
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    Unless they were stored in an abusive environment (like high temperature and humidity), they should be okay.

    I have hundreds of opamps and other IC's from the 70's and other than some tarnish on silver plated leads or gunk from deteriorated antistatic foam, none have failed.
     
  7. WBahn

    Moderator

    Mar 31, 2012
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    A lot depends on how they were stored and how you intend to use them. Unless they were stored very improperly, they will probably work just fine for hobby or prototyping purposes. I would not recommend using them for any kind of automated assembly processes because those processes tend to be much more sensitive to the physical quality of the parts, though this is more an issue for today's fine-pitch surface mount components than the through hole stock you are probably dealing with.
     
  8. dannyf

    Well-Known Member

    Sep 13, 2015
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    the datasheets suggests it identical to jrc4558/ua741. If so, ne5532 is light years better.
     
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  9. absf

    Senior Member

    Dec 29, 2010
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    M5218 in SIL-9 packages were used largely in Technics Electronic Organs & digital piano built during the 80s. While the Yamaha Electones used RC4558 in Dip-8 packages of the same period. I have savaged some of them for my own use. But they are very cheap and are still available in my local electronic shops today.

    Yes, even they were from the 80s, they are still very useable for making pre-amps though a bit nosier than the modern op-amps like NE5532.

    Allen
     
  10. Circuitfreak101

    Thread Starter New Member

    Apr 13, 2016
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    Thanks for the responses guys

    I've also found a fair quantity of 100K pots and a load of 1\4 jack sockets, I fancy building a load of guitar distortion effect pedals once I've brought some enclosures. Most of the commercial one's I've examined used pretty generic low end opamps anyway so my 5218's should be fine in such a circuit.
     
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