low power universal demultiplexer decoder


Posted on Feb 7, 2014

This is a circuit for universal decoder that has functions as either a dual 1-of-4 decoder or as a single 1-of-8 decoder, depending on the signal applied to the Mode Control (M) input. Here`s the figure of the test circuit; In the dual mode, each half has a pair of active-LOW Enable (E) inputs. Pin assignments for the E inputs are such that in the


low power universal demultiplexer decoder
Click here to download the full size of the above Circuit.

1-of-8 mode they can easily be tied together in pairs to provide two active-LOW enables (E1a to E1b, E2a to E2b). Signals applied to auxiliary inputs Ha, Hb and Hc determine whether the outputs are active HIGH or active LOW. In the dual 1-of-4 mode the Address inputs are A0a, A1a and A0b, A1b with A2a unused (i. e. , left open, tied to VEE or with LOW signal applied). In the 1-of-8 mode, the Address inputs are A0a, A1a, A2a with A0b and A1b LOW or open. All inputs have 50 kX pull down resistors. [Circuit diagram source: National Semiconductor Application Notes]




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    IR Link PIC tranceiver
    Smoke-detector
    Sine Wave To Square Wave Converter Circuit
    Enlarger Exposure Meter Circuit
    74HC11 Infra-Red Remote Control Tester
    telephone dtmf remote control
    crystal oscillator discreet pierce oscillator
    Motor Bike Headlight Controller Circuit
    alternating flasher circuit diagram
    Small Breakout for SIM900 GSM Module
    Arduino DAC Signal Generator project



    Top