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Divide by 200 single IC

Discussion in 'Electronic Design' started by Jim Conrad, Mar 19, 2007.

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  1. Jim Conrad

    Jim Conrad Guest

    I am trying to reduce my parts count. Does anyone know of a way to
    divide down by 200, or even 20, using a single CMOS IC?

    Jim Conrad
     
  2. What's the max frequency?


    martin
     
  3. koma

    koma Guest

    Jim Conrad skrev:
    If it is a clock like signal I would use a 74HC390.
    One package can be configured to divide-by-2, 4, 5, 10, 20, 25, 50 or
    100.
     
  4. I like to use the 74hc40103 chips, which are programmable
    to count down or divide from 1 to 255. They operate to
    29MHz typical, 15MHz, min according to Philips, oops, NXP.
    DigiKey has them in stock.
     
  5. You mean like a PIC?


    --
    Many thanks,

    Don Lancaster voice phone: (928)428-4073
    Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
    rss: http://www.tinaja.com/whtnu.xml email:

    Please visit my GURU's LAIR web site at http://www.tinaja.com
     
  6. Hawker

    Hawker Guest

    Divide what? A Clock? A Serial Stream? A Parallel Signal? An Analog signal?
    Anyway for all the above, except the analog signal, my answer would be
    use a small CPLD.

    -H
     
  7. Guest

    Me too. Cheaper than a programmable logic device, and easier to
    program. Digikey isn't the only distributor who stocks the device -
    Farnell also list the 74HC40103N.
     
  8. TT_Man

    TT_Man Guest

    AT Tiny 15 and a few lines of code....
     
  9. Do I get diodes? Resistors? Capacitors? How fast a clock?

    Jim
     
  10. Rich Grise

    Rich Grise Guest

    + development system, + learning curve, +...

    I don't see what's wrong with a 4020/4040/4060 and a little bit o'
    logic...

    Cheers!
    Rich
     
  11. me

    me Guest

    Wow! that took longer than I expected...

    (I was expecting it come first or second)
     
  12. chuck

    chuck Guest

    Take a look at the 4518. That plus a FF will give you 200.

    Chuck
     
  13. MooseFET

    MooseFET Guest


    CD4059
     
  14. krw

    krw Guest

    Ok, a 199:1 ratio resistor divider?
     
  15. Fred Bartoli

    Fred Bartoli Guest

    Rich Grise a écrit :
    OK. And next time do 199, then 198, then 197.
     
  16. Has exactly the same problems as using 6SN7's.


    --
    Many thanks,

    Don Lancaster voice phone: (928)428-4073
    Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
    rss: http://www.tinaja.com/whtnu.xml email:

    Please visit my GURU's LAIR web site at http://www.tinaja.com
     
  17. John Fields

    John Fields Guest

     
  18. samiam

    samiam Guest

    Id use a 74x393. the dual ripple counters will allow up to a divide by 256
     
  19. samiam

    samiam Guest

    Scratch that, youd still need logic to decode the outputs and reset at
    200 to achieve divide by 200
     
  20. chuck

    chuck Guest

    OK, what about the MC14553? 3-digit BCD counter in a 16-pin DIP. Should
    be exactly what you are looking for. It even has an on-chip oscillator.

    Chuck
     
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