3 8 Decoder Logic Diagram
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The complement of input a 2 is connected to enable e of lower 2 to 4 decoder in order to get the outputs y 3 to y 0.
3 8 decoder logic diagram. Let us see diagram of 3 8 decoder which decodes a 3 bit information and there is only one output line which gets the value 1 or in other words out of 2 3 8 lines only 1 output line is selected. It takes 3 binary inputs and activates one of the eight outputs. Decoder converts one type of coded information to another form. 3 to 8 line decoder circuit is also called as binary to an octal decoder.
Sonali deo 7 343 views. A decoder has n inputs and an enable line a sort of selection line and 2 n output lines. The block diagram of 3 to 8 decoder using 2 to 4 decoders is shown in the following figure. 3 to 8 line decoder has a memory of 8 stages.
In the below diagram given input represented as i2 i1 and i0 all. From the truth table it is seen that only one of eight outputs do to d7 is selected based on three select. Based on the 3 inputs one of the eight outputs is selected. This decoder circuit gives 8 logic outputs for 3 inputs and has a enable pin.
3 line to 8 line decoder. It takes 3 binary inputs and activates one of the eight outputs. 8 decoder using basic logic gates such as and not or etc the module has one 3 bit input which is decoded as a 8 bit output. 74138 decoder ic 3 to 8 decoder pin diagram 74138 working of 74138 why 74138 have 3 enable pin duration.
3 to 8 decoder with truth table and logic gates we know possible outputs for 3 inputs so construct 3 to 8 decoder having 3 input lines a enable input and 8 output lines. 8 decoder using basic logic gates here is the code for 3. Encoder in digital logic an encoder is a combinational circuit that performs the reverse operation of decoder it has maximum of 2 n input lines and n output lines hence it encodes the information from 2 n inputs into an n bit code. This decoder circuit gives 8 logic outputs for 3 inputs.
The truth table for 3 to 8 decoder is shown in table 1. The logical diagram of the 3 8 line decoder is given below. The circuit is designed with and and nand logic gates. The circuit is designed with and and nand combinations.
It is convenient to use an and gate as the basic decoding element for the output because it produces a high or logic 1 output only when all of its inputs are logic 1. A 3 to 8 decoder has three inputs a b c and eight outputs do to d7.
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