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Need help with CD4059A "Divide-By-N" chip

Discussion in 'Electronic Design' started by Guest, Sep 15, 2004.

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  1. Guest

    Guest Guest

    I need help setting up this to an N factor of 1000. I am trying to lay this
    chip out on a PCB. I have the manufacturer data sheets, but I don't
    understand them.

    Any help would be great.
     
  2. Ken Smith

    Ken Smith Guest

    Wire one up and play with the K and M inputs until it does what you want
    then do the PCB.
     
  3. If this is not a homework question and you really do
    need to implement a fixed divide by 1000, then the
    better answer might be to use 3x 4017 decade dividers
    in cascade. They will take about the same pcb area
    as one 4069.
     
  4. Fred Bloggs

    Fred Bloggs Guest

    There is an LE or Latch Enable input not shown- tie it low for
    continuous pulse output operation. The output is a pulse one clock cycle
    wide occurring at frequency shown:

    View in a fixed-width font such as Courier.




    DIVIDE BY N=1000 x N +100 x N +10 x N + N
    1000 100 10 1

    74HC4059
    +-----------------+
    -----| J1 |
    -----| J2 |
    N -----| J3 |
    1 -----| J4 |
    | |
    -----| J5 |
    -----| J6 |
    N -----| J7 |
    10 -----| J8 |
    | |
    -----| J9 | Fin
    -----| J10 Q |---> Fout= ---
    N -----| J11 | N
    100 -----| J12 |
    | |
    -----| J13 |
    -----| J14 |
    N -----| J15 |
    1000 -----| J16 |
    | |
    | |
    Fin-----| CP |
    | |
    | |
    | KA KB KC |
    +-----------------+
    | | |
    | | |
    | | |
    H H L







    DIVIDE BY 1000=1000 x 1 +100 x 0 +10 x 0 + 0


    74HC4059
    +-----------------+
    L -----| J1 |
    L -----| J2 |
    '0' L -----| J3 |
    L -----| J4 |
    | |
    L -----| J5 |
    L -----| J6 |
    '0' L -----| J7 |
    L -----| J8 |
    | |
    L -----| J9 | Fin
    L -----| J10 Q |-> Fout= ---
    '0' L -----| J11 | 1000
    L -----| J12 |
    | |
    H -----| J13 |
    L -----| J14 |
    '1' L -----| J15 |
    L -----| J16 |
    | |
    | |
    Fin-----| CP |
    | |
    | |
    | KA KB KC |
    +-----------------+
    | | |
    | | |
    | | |
    H H L
     
  5. Tam/WB2TT

    Tam/WB2TT Guest

    You might mention what frequency you want this to work at. The 4XXX parts
    are not very fast.

    Tam
     
  6. Tam/WB2TT

    Tam/WB2TT Guest

    Makes sense, or a pair of 74HC390 dual decade counters. Not sure why he want
    to use a programmable counter for a single value. Also, he will save money
    with either the 390 or the 4017 over the 4059 unless he has a drawer full of
    them.

    Tam
     
  7. Mark Zenier

    Mark Zenier Guest

    There's an HC version of it, but I think only TI makes it.

    Mark Zenier Washington State resident
     
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