Connect with us

multiplexer question

Discussion in 'Electronic Design' started by panfilero, Jan 3, 2007.

Scroll to continue with content
  1. panfilero

    panfilero Guest

    Hello, I was wondering if there is such a thing as a 16 to 1
    multiplexer. I need something that can connect 16 individual inputs to
    1 output 1 at a time in sequence. But I'm having trouble finding a
    16:1 MUX. Also, I ordered some chips from mouser, and some are big
    enough to stick in my bredboard but a lot of them were real tiny...
    does anyone know what's up with the real tiny ones? I couldn't find in
    the name of the chip something that would let me know that it was going
    to be too tiny to fit in a regular solderless breadboard.

  2. JeffM

    JeffM Guest

  3. Guest

    I guess you do or you wouldn't waste your time responding. Why do you
    try to insult him/her in the process? It is obvious that this person
    needs some information and that is what this group is for. If you want
    to treat it like a chat room and insult people, go the Yahoo "fight
  4. JeffM

    JeffM Guest

  5. John  Larkin

    John Larkin Guest

    Usually one uses two 8:1 mux's, HC4051's or some such. Connect their
    address and output pins, but enable one at a time.

    These are nice adapters for tiny parts:

    Ignore JeffM. He's a typical self-appointed expert who actually
    contributes little.

  6. panfilero

    panfilero Guest

    Thanks for the tip and the links, I appreciate the help. I'm trying to
    make a little drum machine and couldn't figure out how to get the 16
    inputs hooked up, I think linking two 8:1's should do it.
  7. Joerg

    Joerg Guest

    There is also the CD4051 if you need higher voltage capability. No free
    lunch though since that would require corresponding logic levels to
    address it.

    There are specialty chips for telecom applications with 16 or even a lot
    more inputs. Often called "crosspoint switches" because they can mux
    each input to a number of outputs or can be cascaded to do that. But
    those things are usually very expensive and hard to buy.
  8. I would use 16 diodes as a 16 input OR, connected to an interrupt pin.Then
    connect the 16 inputs to 16 I/O pins.
    On interrupt, poll the 16 pins to see which one caused the interrupt.
    Efficient, quick and low cost.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day