The figure below shows the truth table of a 3-to-8 decoder. As you can see in the truth table for each input combination one output line is activated.
N bits exactly one output pins is 1 rest of the pins are 0 Example.
Applications of 3 to 8 decoder. 3 to 8 Decoder. You need 9 3-to-8 decoders. 3 to 8 Decoder This type of decoder is called as the 3 line to 8 line decoder because they have 3 inputs and 8 outputs.
All parameters considered in example are for explanation purpose only parameters may be different in actual applications. 3 to 8 line decoder IC 74HC238 is used as a decoder demultiplexer. 2 to 4 decoder is the minimum possible decoder.
A decoder is a combinational circuit which has many inputs and many outputs. Lets take an example of 3-to-8 line decoder. 1 bit corresponding to the value of the binary input number is set to 1.
2-to-4 decoder 3-to-8 decoder or 4-to-16 decoder are other examples. The setup of this IC is accessible with 3-inputs to 8-output setup. Servers also come up with 74LS138.
Decoder-In this tutorial you learn about the Decoder which is one of the most important topics in digital electronicsIn this article we will talk about the Decoder itself we will have a look at the 3 to 8 decoder 3 to 8 line decoder designing steps a technique to simplify the Boolean function and in the end we will draw a logic diagram of the 3 to 8 decoder. 3 to 8 line decoder demultiplexer is a combinational circuit that can be used as both a decoder and a demultiplexer. The IC 74LS138 is a 3 to 8 line decoder integrated circuit from the 74xx family of transistor-transistor-logic-gates.
It has three inputs as A B and C and eight output from Y0 through Y7. In a 3-to-8 decoder three inputs are decoded into eight outputs. Log 2 n Output.
For example an input will activate the line A0 A1 A3 as 01 at the input has activated line D1 and so on. 3-8 DECODERS This type of decoder contains two inputs. The input to a decoder is parallel binary number and it is used to detect the presence of a particular binary number at the input.
3 bits representing a binary input number Output. 3 to 8 decoder. This is the simple concept of 3 to 8 line decoder we can use this concept in other examples also.
1 decoder for enabling 1 decoder out of 8 decoder. 4 to 16 decoder. Some digital systems like microcontrollers still use 74LS138 for data decoding.
We know that 2 to 4 Decoder has two inputs A 1 A 0 and four outputs Y 3 to Y 0. To decode the combination of the three and eight we required eight logical gates and to design this type of decoders we have to consider that we required active high output. Government Applications and 3.
IC 74HC238 decodes three binary address inputs A0 A1 A2 into eight outputs Y0 to Y7. The truth table for 3 to 8 decoder is shown in table 1. It is used to convert binary data to other codes.
From the truth table it is seen that only one of eight outputs DO to D7 is selected based on three select inputs. And four outputs represented by D0 D1 D2 D3 D4 D5 D6 and D7. Decoders are important logic blocks that find a wide variety of applications in the design of digital systems.
What is Binary Encoder. Based on the 3 inputs one of the eight outputs is selected. Binary to octal conversion using 3 to 8 decoder BCD to decimal conversion using 4 to 10 decoder binary to hexadecimal conversion using 4 to 16 decoder etc.
A decoder does the opposite job of an encoder. In case the n bit coded information has unused bit combinations the decoder may have less than 2n outputs. 74LS138 3-8 decoder APPLICATIONS It is widely used in line decoders.
8 decoders for selecting one of 64 lines. In this section let us implement 3 to 8 decoder using 2 to 4 decoders. Whereas 3 to 8 Decoder has three inputs A 2 A 1 A 0 and eight outputs Y 7 to Y 0.
3 to 8 Decoder. The main function of this IC is to decode otherwise demultiplex the applications. Verilog tutorial and programs with Testbench code – 3 to 8 decoder.
The device also has three Enable pins. Based on the combinations of the three inputs only one of the eight outputs is selected. Types of Binary Encoder 2 to 1 Line Encoder – Schematic Truth Table Applications of Binary Encoders 4 to 2 Line Encoder – Truth Table 4 to 2 Priority Encoder – K-Map and Schematic 8 to 3 Line Encoder – Truth Table Schematic 8 to 3 Priority Encoder – Truth Table Schematic Cascading Priority Encoders Schematic Diagram Operation Binary Decoder IC Details.
It is a combinational circuit that converts n lines of input into 2 n lines of output. 4414 illustrates a typical application where a 74HC138 3-to-8-line decoder is used to enable the microprocessor to communicate with many locations in its memory system. A 3 to 8 decoder has three inputs ABC and eight outputs DO to D7.