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ID an IC from the 60's

Discussion in 'Datasheets, Manuals or Parts' started by gking53, Aug 2, 2017.

  1. gking53

    gking53 New Member

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    Was cleaning out an old chemical plant / lab and found some IC's in an electrical room. Markings on the bottom lead me to believe they are from 68 as this plant ran between the 60's to 2015. Any help IDing them or how to proceed in learning what they do would be much appreciated!
    P_20170802_190610_vHDR_On.jpg
     
  2. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    They are probably 'in house' numbers, so completely meaningless.
     
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  3. ronsimpson

    ronsimpson Well-Known Member Most Helpful Member

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    King,
    That term might not mean anything to you. Big companies some times would get very common parts and have their own numbers put on them.
    Reasons: So you and I can not learn what they are. So you can not do repair. Replacement parts are sold at a very high price.
    Many time many companies make the same part. A house part has been approved, tested, and probably comes form one maker.
     
  4. dave

    Dave New Member

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  5. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    As an engineer, I party agree with that :D

    Another reason though is so the manufacturer can source suitable parts from multiple manufacturers, and keep them all under a single part number.

    So they might source 741 opamps from various different manufacturers, and have them all printed with the same in-house number - meaningless to anyone else. Individual transistors were even more so, but you could often easily substitute devices you already had, with IC's it's often difficult to know what it actually is (and it 'could' even be a custom chip).
     
  6. throbscottle

    throbscottle Well-Known Member

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    I wonder if it's worth connecting 1 or 2 as if it's ttl and try to work out if there's a logic function. Of course, you may just get smoke...
    They are ceramic packages. Does that suggest anything to anyone?
     
  7. throbscottle

    throbscottle Well-Known Member

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    You could try to flog them on eBay. You might have exactly what someone else is looking for...
     
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