74HC4052 Multiplexer/Demultiplexer

Discussion in 'Embedded Systems and Microcontrollers' started by MrL, Oct 24, 2010.

  1. MrL

    Thread Starter Member

    Oct 21, 2009
    46
    0
    Hi,

    I'm currently working on a keypad circuit, in which a key press must be detected. The keypad is a 3x4 matrix. When a key is pressed, a 0 pulse will be sent to one row and one column.

    I was told that the 74HC4052 IC could be used to help with my circuit, but i'm struggling to grasp the concept of how it could be used.

    The following is a link to the IC's datasheet: http://www.datasheetcatalog.org/datasheet/philips/74HC4052N.pdf

    If anyone could point me in the right direction it would be greatly appeciated.

    Thanks.

    EDIT: Made a mistake in the title, should say 74HC4052
     
    Last edited by a moderator: Oct 25, 2010
  2. MrL

    Thread Starter Member

    Oct 21, 2009
    46
    0
    Would anyone be able to help please?
     
  3. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
    Why don't you just use a 74HC595 shift register instead?
     
  4. MrL

    Thread Starter Member

    Oct 21, 2009
    46
    0
    It's required as part of my Uni project that i must use this multiplexer/demultiplexer.

    I was wondering what the z output would be if for example, the Y3 channel was turned on and was at a high state?
     
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