which semiconductor company do you normally use?

Discussion in 'General Electronics Chat' started by bug13, Jan 22, 2013.

  1. bug13

    Thread Starter Well-Known Member

    Feb 13, 2012
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    Hi guys

    I have read about/heard over a conversation like this a few times:

    someone just designed something and then he/she find out one the key chip he/she used in his/her design is no longer in production without much notice, or something like that.

    Does anyone have experience like that, or know about this?

    Which semiconductor company have done so? what company should be aware of for young player.

    any opinions/info/thoughts are welcome :)
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    I use all of them,
    except the ones that are gone:

    RCA
    Burr Brown
    Harris
    Philips
    Signetics
    Motorola
    Dallas Semiconductor
    National Semiconductor
     
    Last edited: Jan 22, 2013
    bug13 likes this.
  3. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    I am not sure if the concern is using "wrong" suppliers or, more likely, obscure devices. If you stick with the mainstream parts made by multiple companies ("dual sourced"), then you will usually not have a problem. If you are concerned, call the supplier and ask to talk to the Product Manager of what ever product line you need information on (e.g microcontrollers, amplifiers, discrete transistors, ...). Then simply ask if this part is scheduled for deletion. It is probably not necessary to ask unless the DATASHEET has not been updated within the past five years or if inventory at distributors (usually posted) appears to be unnaturally small. The one category that seems to have a very short life cycle lately is high power LEDs. Cree, Osram, Philips-lumiled, Epistar and Toshiba are the majors and they seem to have lifetimes of 18 months or less. The smaller suppliers are worse, they seem to make one campaign and off to the next highest power LED next week.
     
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  4. MrChips

    Moderator

    Oct 2, 2009
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    Yeah. Once upon a time I had a fantastic design that would make me rich using an Intel 4004 chip.
    Too bad they ran out of stock and can't get any more.
     
  5. bug13

    Thread Starter Well-Known Member

    Feb 13, 2012
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    Thanks for the list, didn't know Motorola is gone, my school is still teaching one of its chip...
     
  6. crutschow

    Expert

    Mar 14, 2008
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    Many of those companies have been absorbed by others such as:

    Harris \rightarrow Intersil
    Burr Brown \rightarrow TI
    National \rightarrow TI
    Motorola Semi \rightarrow ON Semiconductor
    Dallas Semiconductor \rightarrow Maxim
    Signetics \rightarrow Philips \rightarrow NXP

    and many of their parts are still built by the takeover companies.
     
  7. MrChips

    Moderator

    Oct 2, 2009
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    Sorry, I chose this list specifically to show that even big companies come and go.
    These have all been taken over by other companies, the most notable one, of course, is National Semiconductor which has be absorbed into Texas Instruments.

    Motorola chips are now manufactured by either ON or Freescale.

    There are some very useful chips that have been produced in the past by big name companies that are now obsolete or difficult to find.

    Examples:

    TI SN76477 Complex Sound Generator
    Exar XR8038 Waveform Generator
     
  8. radiohead

    Active Member

    May 28, 2009
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