NTE7172 - Crowbar Integrated Circuit

Discussion in 'The Projects Forum' started by pscammp, May 3, 2016.

  1. pscammp

    Thread Starter New Member

    Feb 22, 2016
    23
    1
    Hey all,
    Anyone know if its possible to purchase NTE7172 IC's in the UK ?

    It is supposed to be a replacement for the old MC3423 IC you could get
    years ago apparently used as a Crowbar device !

    Regards
    Paul
     
    Last edited: May 3, 2016
  2. Papabravo

    Expert

    Feb 24, 2006
    10,142
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    If it is, expect to pay 10x the cost of the original component.
     
  3. Colin55

    Member

    Aug 27, 2015
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  4. #12

    Expert

    Nov 30, 2010
    16,284
    6,797
  5. #12

    Expert

    Nov 30, 2010
    16,284
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    It's easy enough to design your own crowbar if you have enough space for 3 or 4 parts.
     
  6. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,043
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    Send me a PM, I'll send you a few MC3423
     
  7. pscammp

    Thread Starter New Member

    Feb 22, 2016
    23
    1
    Hey GopherT,

    How do I PM you, cant find it anywhere ???

    Paul
     
  8. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    Upper right of this page - it says INBOX. I sent you a note.
     
  9. pscammp

    Thread Starter New Member

    Feb 22, 2016
    23
    1
    Yep,
    Sorry Gopher, just worked it out and I have replied

    Thanks
    Paul
     
  10. tstuff1

    New Member

    Aug 29, 2016
    2
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    Do you have any MC3423 left I am after a small quantity & I couldn't find the PM function either?

    Thanks
     
  11. ian field

    Distinguished Member

    Oct 27, 2012
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    AFAICR: Some of the TL431 appnotes include a crowbar circuit.
     
  12. tstuff1

    New Member

    Aug 29, 2016
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    I know, but that doesn't help much when I have dead MC3423 already in circuit on a pcb to replace!
     
  13. ian field

    Distinguished Member

    Oct 27, 2012
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    There's various NTE cross reference lists online, if you can't find one and the Motorola part is discontinued - you may not have much choice.
     
  14. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    Yes, I'll send you a note. New users cannot start PM conversations.
     
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