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CMOS IC help!

Discussion in 'General Electronics' started by David, Feb 15, 2005.

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  1. David

    David Guest

    Looking for help to find a replacement for the 4063b IC - I have a year 11
    pupil who has built a circuit which requires this IC but so far the only
    thing I can determine is that is either very hard to find or is plain

    Any help would be appreciated as deadlines draw near.

    TIA - befuddled electronics teacher
  2. Maybe a 74HC85 would do?
  3. Dave Platt

    Dave Platt Guest

    Digi-Key has the TI CD4063BE 4-bit magnitude comparator IC, in 16-pin DIP
    format, for $0.64 each in onesies. They've also got it in 16-pin SOP
    for the same price.

    Mouser has the same part, and also has an ST Microelectronics version
    for a few pence less.
  4. John Fields

    John Fields Guest

  5. "btopenworld" suggests that you are in UK.

    As you say, they are no longer in the RS or
    Farnell catalogues.

    I have a couple in stock (unused, but condition
    unknown), which you can have if you email your
    snailmail address.
  6. Paul Vaughan

    Paul Vaughan Guest

    If you get stuck....let me know and I will send you some samples from
    our stock.
  7. David Taylor

    David Taylor Guest

    David pleaded:
    Re the 4063B, it's widely available, and you can get it from ESR for 41p.

    ESR are a great little firm. I've no connection with them, but use them
    often as a customer.

    This link will take you right to the 4063B:

    An alternative supplier is Grandata - another helpful firm at:

    Best of luck with the project!

  8. Ugly_Georges

    Ugly_Georges Guest

    74 or 74LS are most of the time NOT compatible

    You must take : 74HCTxxx
  9. 74Cxx will be nearest to 4000 series, followed by 74HC then 74HCT.

    In all cases there may be problems if the supply voltage is not 5V.

    I think some 74C are okay with higher supply voltages but not AFAIK 74HC.
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