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Decoders and Demultiplexers


Digital decoders and digital demultiplexers are integrated circuits (ICs) that move data between inputs and outputs. Digital decoders convert coded information into a familiar or uncoded form so that, for example, binary coded decimal (BCD) numbers can be converted into digits that display on a seven-segment calculator. Digital demultiplexers switch digital data from one input line to several output lines in a specific time sequence. They are often used in telecommunications applications. Digital decoders and digital demultiplexers are available with 1 to 4 input lines and 2, 4, 6, 8, 10, 14, or 16 output lines. Both types of devices have inverted outputs so that the selected output is set to 0, while all of the other outputs remain at 1. Digital decoders can be used individually, or connected together for use as demultiplexers.





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