Logic Diagram Of 2 To 4 Decoder

At any time only one of these 4 inputs can be 1 in order to get the respective binary code at the output.

Logic diagram of 2 to 4 decoder. The above diagram is the basic 24 decoder. Draw the logic diagram of a 2 to 4 line decoder using a nor gates only and b nand gates only. A decoder is a combinational circuit constructed with logic gates. Please subscribe to my channel.

The block diagram of 2 to 4 decoder is shown in the following figure. Typical decoderdemultiplexer ics might contain two 2 to 4 line circuits a 3 to 8 line circuit or a 4 to 16 line circuit. We have to realize this using nor gates. Let 4 to 2 encoder has four inputs y 3 y 2 y 1 y 0 and two outputs a 1 a 0.

A decoder circuit is used to transform a set of digital input signals into an equivalent decimal code of its output. So our aim is to realize 4 outputs using nor. Now we know possible outputs for 2 inputs so construct 2 to 4 decoder having 2 input lines a enable input and 4 output lines. Let 2 to 4 decoder has two inputs a 1 a 0 and four outputs y 3 y 2 y 1 y 0.

In the below diagram given input represented as i 1 and i 0 all possible outputs named as o 0 o 1 o 2 o 3 and a e were represented by enable input. Pin description fig 4. One of these four outputs will be 1 for each combination of inputs when enable e is 1. 4 to 2 encoder.

One exception to the binary nature of this circuit is the 4 to 10 line decoderdemultiplexer which is intended to convert a bcd binary coded decimal input to an output in the 0 9 range. In this article we will discuss on 4 to 16 decoder circuit design using 3 to 8. The truth table of 4 to 2 encoder is shown below. 2 to 4 decoder.

Typical decoder ics might include two 2 4 line circuits a 3 8 line circuit or a 4 16 line decoder circuit. Logic diagram one decoderdemultiplexer ddd fig 5. For n inputs a decoder gives 2n outputs. Include an enable input.

Pin configuration so16 ssop16 andtssop16. The block diagram of 4 to 2 encoder is shown in the following figure. One exclusion to the binary character of this circuit is the 4 10 line decoders which is proposed to alter a binary coded decimal bcd input to a 0 9 range output. 74hct139 dual 2 to 4 line decoderdemultiplexer rev.

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