Switching 4-Signal Souces using 4016 TDM

Discussion in 'General Electronics Chat' started by vinodquilon, Jun 15, 2010.

  1. vinodquilon

    Thread Starter Member

    Dec 24, 2009
    See the attachment...

    It presents switching of 2 sources using CMOS CD4016 Analog Switch into a single channel.

    My question is, how can I switch 4 sources using a 'single clock'.

    Here is my 'complex' interpretation,
    Use clock to run one mod-4 asynchronous counter with outputs Q0, Q1.
    Then construct one 'logic circuit' to drive 4016 according to the truth table given in the


    Can anybody suggests some easy tricks ?
  2. n1ist

    Active Member

    Mar 8, 2009
    That would work. Look into the CD4017 or CD4022 for your counter.
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    Depending on your sources, you would want to replace the 4016 with a 4066. The 4066 has the same functions, but is somewhat improved over the 4016.
  4. rogs

    Active Member

    Aug 28, 2009
    Either use 4 outputs from a 4017, as suggested by n1ist, with each output driving an individual 4016 switch (or better still a 4066 as beenthere suggests).

    If you do use a binary counter, just use a 4051 instead of a 4066. That will allow you to select up to one of eight inputs, with just a 3 bit address. no further address decoding 'logic' required.