What does a 3×8 decoder do?

3 to 8 line decoder demultiplexer is a combinational circuit that can be used as both a decoder and a demultiplexer. IC 74HC238 decodes three binary address inputs (A0, A1, A2) into eight outputs (Y0 to Y7). The device also has three Enable pins. The same combination is used as a demultiplexer.

What is decoder explain with truth table?

A decoder is a circuit which has n inputs and 2n outputs, and outputs 1 on the wire corresponding to the binary number represented by the inputs. For example, a 2-4 decoder might be drawn like this: and its truth table (again, really four truth tables, one for each output) is: i1.

How does decoder work?

A decoder is a device that generates the original signal as output from the coded input signal and coverts n lines of input into 2n lines of output. An AND gate can be used as the basic decoding element because it produces a high output only when all inputs are high.

What is 74×138 decoder?

74×138 3-to-8 Decoder The 74×138 is a commercially available MSI 3-to-8 decoder whose gate- level circuit diagram an. Page 1. 74×138 3-to-8 Decoder. The 74×138 is a commercially available MSI 3-to-8 decoder whose gate- level circuit diagram and symbol are shown in Figure 7; its truth table is given in Table.

How to design a 3 to 8 decoder?

3 to 8 Decoder designing steps 1 Problem: 3 to 8 line decoder. 2 The number of available inputs are 3 and outputs are 8. 3 Let us represent the inputs and outputs by symbol letters. Let us represent the inputs by x, y, and z; and the outputs… 4 3 to 8 Decoder Truth Table: More

What is the truth table for a 3 to 8 decoder?

3 to 8 Decoder. A 3 to 8 decoder has three inputs (A,B,C) and eight outputs (DO to D7). Based on the 3 inputs one of the eight outputs is selected. The truth table for 3 to 8 decoder is shown in table (1). From the truth table, it is seen that only one of eight outputs (DO to D7) is selected based on three select inputs.

What is the logic diagram of a 3 to 8 decoder?

Fig (1): Logic diagram of 3 to 8 decoder. It is also called a binary-to-octal decoder, since the inputs represent 3-bit binary numbers and the outputs represent the eight digits in the octal number system. Fig (2): 3-to-8 decoder in IC form.

How many minterms does a 3 to 8 line decoder generate?

Likewise, 3 line to 8 line decoder generates eight minterms for 3 input variables of A0, A1 & A2. The implementation of this 3 line to 8 line decoder can be done using two 2 lines to 4 line decoders. We have discussed above that 2 to 4 line decoder includes two inputs and four outputs.