replacement for 7446?

Discussion in 'The Projects Forum' started by iamapril, Feb 8, 2012.

  1. iamapril

    Thread Starter New Member

    Feb 8, 2012
    12
    0
    Good day everyone. I have this project that uses a 7446 decoder. Unfortunately, all of the stores selling electronic parts here in our place don't have any stocks of it. What alternative decoder can I substitute for this?
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    Hello,

    Do you need the 30 Volts open collector output?

    Code ( (Unknown Language)):
    1.  
    2. 7446            BCD to 7-segment display decoder/driver with 30 v open collector outputs
    3. 7447            BCD to 7-segment decoder/driver with 15 v open collector outputs
    4. 7448            BCD to 7-segment decoder/driver with Internal Pullups
    5. 7449            BCD to 7-segment decoder/driver with open collector outputs
    6.  
    You can also look for the LS types that are more available.

    Bertus
     
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  3. iamapril

    Thread Starter New Member

    Feb 8, 2012
    12
    0
    can i use a 7447 decoder to an anode 7 segment display?
     
  4. iamapril

    Thread Starter New Member

    Feb 8, 2012
    12
    0
    not necessarily. what was required to us was to use a decoder for an anode seven segment display. can i use 7447 instead of 7446?
     
  5. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    Hello,

    The 7446 and 7447 are both open collector display drivers.
    See the attached datasheet for more info.

    Bertus
     
  6. iamapril

    Thread Starter New Member

    Feb 8, 2012
    12
    0
    thanks! God bless
     
  7. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    The CD4511 is very close pinout wise, and the datasheet shows how to use it both ways with external transistor drivers.
     
  8. k7elp60

    Senior Member

    Nov 4, 2008
    478
    69
    Where are you located? I would be happy to send you some if you pay the postage, I have 7 in my stock.
    Send me a PM if you like.
     
  9. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    sn74246, sn74247, sn74LS248 are functionally identical to their respective 7446,7447, and 74LS48. Texas Insruments has stopped making the sn74246 and sn74247.

    If your local suppliers don't have those either, you will need to order them from a supplier online.
     
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