Need a vintage CT7001 clock chip

Discussion in 'General Technical Questions and Answers' started by WA6PEW, Feb 5, 2010.

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  1. WA6PEW

    WA6PEW Ham Member QRZ Page

    If anyone has one for sale or trade or knows where I can get one, please reply to ruteng1 @ att . net
    Thanks, Rudy
  2. W9GB

    W9GB Ham Member QRZ Page

    That is an old Fairchild / Cal-Tex part number (circa 1978).
    IF you find old Radio Shack blister pack parts, look for part number: RS1756 -- that was the Cal-Tex clock IC.

    Here is an old Datasheet / Application note for this MOS/LSI Clock Calender

    Can you use the NTE2060/1 ??
    These do not have multiplexed outputs.

  3. W6OP

    W6OP Guest

    I have a Mostek MK50252N Radio Shack 276-1751 with data sheet. Is that close enough?

    Pete W6OP
  4. WA9SVD

    WA9SVD Ham Member QRZ Page

    Not really. The two parts are vastly different and not interchangeable.. The only thing they have in common is that they are both Digital clock chips.
  5. K7ELP

    K7ELP Ham Member QRZ Page

    I have one, sent you a message at your listed email.
  6. W6OP

    W6OP Guest

    OK, didn't know if you were looking for a replacement for a bad one or just wanted to build a digital clock.

    Pete W6OP
  7. WA6PEW

    WA6PEW Ham Member QRZ Page


    thank you all for you interest and suggestions. I do need the CT7001 only as it is replacing a blown one in an old clock I made back in the 70's
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