MM74HC138MX

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Logic - Signal Switches, Multiplexers, Decoders are essential components in digital circuits. In this article, we take the MM74HC138MX as an example and discuss its application field and working principle.

1. Introduction

The MM74HC138MX is a high speed CMOS 3 to 8 line decoder/demultiplexer. This device is designed to perform a decoding function that is non-inverting 3 line to 8 line. The output of this IC is Logic High when the specific combination of inputs are given at the Decoder inputs. This MM74HC138MX is low power version of the standard decoder IC MM74HC138 and is most commonly used in multiplexing applications and for logic logic decoding operations.

2. Application Field of MM74HC138MX

The MM74HC138MX is widely used in many applications. This IC is a great choice for applications where low power consumption is a factor. Some of the most common applications of MM74HC138MX are as follows:

• Multiplexing: The output of MM74HC138MX can be used as a multiplexer to select one of eight inputs by using the three inputs. This multiplexing function is widely used in various electronic systems.
• Door Lock Control: The output of MM74HC138MX can be used to control the door lock system. The three inputs of the IC are used to select the particular door lock and the output is used to control the door.
• Display Interface: MM74HC138MX can also be used for display interface in applications like displays, light beams, and other visual motion feedback.
• Logic Decoding: MM74HC138MX is also used to decode the input logic signals into the corresponding output. This decoder is used in a variety of digital circuits to convert the input logic signals into the output logic signals.

3. Working Principle of MM74HC138MX

The working principle of MM74HC138MX is based on the logic behind the input and output. The device consists of three inputs A, B and C and eight outputs Y0-Y7. The three inputs A, B and C represent the Digital inputs, and Y0 - Y7 represent the Digital outputs. The output of MM74HC138MX is Logic High when the specific combination of inputs are given at the Decoder inputs. The logic operations of the inputs and outputs of MM74HC138MX are as follows:

4. Summary

The MM74HC138MX is a high speed CMOS 3 to 8 line decoder/demultiplexer. It is widely used in many applications where low power consumption is a factor. The output of MM74HC138MX is logic high when the specific combination of inputs are given at the Decoder inputs. This decoding operation is based on the logic of the inputs A, B, C and the outputs Y0-Y7. We have discussed this decoding process in detail in the previous section. Overall, the MM74HC138MX is a great choice for multiplexing, door lock control and display interface applications.

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