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    74HC157

    74HC157 Logic Gate

    KSh 140.00

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    The 74HC157 is a quad 2-to-1 multiplexer integrated circuit (IC) belonging to the 74HC logic family. Here’s a breakdown of its key features:

    • Function: It acts as a multiplexer, which essentially allows you to select one of two data sources for each of its four outputs.

    • Number of Channels: Quad – It contains four independent multiplexers within a single IC package.

    • Input/Output Count:

      • For each multiplexer:
        • Two data inputs (Data source 0: I0 and Data source 1: I1)
        • One select input (S) to choose between I0 or I1
        • One output (Y) that provides the selected data
      • One common Enable input (E) for all four multiplexers (might be active high or low depending on the specific variant)

    • Logic Family: 74HC – Uses high-speed CMOS technology, offering good noise immunity and relatively low power consumption.

    How it Works:

    The 74HC157 allows you to route data from two sources (I0 and I1) to four outputs (Y) based on the Select input (S) for each multiplexer.

    • When S is LOW, the data from I0 is routed to the corresponding Y output.
    • When S is HIGH, the data from I1 is routed to the corresponding Y output.

    The Enable input (E) can be used to control all four multiplexers simultaneously. Depending on the specific variant (check the datasheet), a high or low signal on E might enable or disable the outputs. When disabled (outputs in high-impedance state), regardless of the S input, no data is routed to the Y outputs.

    Applications:

    • Data selection: Choosing between different data sources based on a control signal (S).
    • Signal multiplexing: Combining multiple data streams onto fewer output lines.
    • Building logic circuits: Implementing more complex logic functions by combining multiple 74HC157s with other logic gates.
    • Microcontroller interface expansion: Expanding the number of data inputs or outputs for a microcontroller by using multiple 74HC157s.

    Resources:

    You can find the datasheet for the 74HC157 online at various electronics component distributors or websites.

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