Demultiplexer
This Demultiplexer is kind of the same as the decoder, but it contains select lines as well. It is used to send the single input over the multiple output lines. It accepts data from one input signal and transfers it over the provided number of output lines. It contains data input lines, select lines and output lines.
Need of Demultiplexer
- Data Distribution: Demultiplexers are used to distribute data from one source to multiple destinations. For instance, in telecommunications, a demultiplexer can separate different channels of data from a single input stream so that each channel can be processed separately.
- Address Decoding: In microprocessors, demultiplexers can be used for address decoding. They take a portion of an address and select a specific memory or peripheral device based on that address, ensuring that the right data gets to the right place.
- Multiplexed Displays: Demultiplexers are often used to drive multiplexed displays, where multiple LEDs or segments share a common set of connections. The demultiplexer selects which individual display to activate at a given time, creating the illusion of multiple active displays.
- Analog to Digital Conversion: Demultiplexers can be used in analog-to-digital converters to select different input channels for conversion. This is particularly useful when you have multiple analog signals that need to be digitized one at a time.
Difference between Decoder and Demultiplexer
Decoders and Demultiplexers both are digital logic components used in electronic circuits to perform specific tasks related to signal routing and control. While they might seem similar at first glance, they serve different purposes and have distinct characteristics. Here’s an explanation of the key differences between a decoder and a demultiplexer.