CD74HC123PW

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Multivibrators are numerous types of electronic circuit devices or devices consisting of two amplifying elements, such as transistors, operating in such a way that their output signals are complementary to each other. In other words, the two output signals of the multivibrator circuit will always be in opposite phase. These devices are popularly used in both digital and analog electronics circuits, where they are employed in logic gates and clocks. One of the most popular types of multivibrators is the CD74HC123PW. In this article, we’ll explore its application field and working principle.

Application Field

CD74HC123PW is a dual monostable multivibrator circuit. This kind of device finds application in clock generator circuits, analog-to-digital converters, timing control logic and trigger circuits. As compared to regular semiconductor bistable multivibrators, this model offers more features and improved performance. It has an input resistance of more than 10Kohms, providing an extremely low drain current and very low noise levels. What’s more, it is compatible with several types of logic family, such as TTL, ECL and CMOS.

Working Principle

CD74HC123PW works by first storing the input signal as current level inside an internal storage element, such as a capacitor, as soon as the input signal goes from low to high. This enables the device to perform its switching operations while keeping the input and output signals unchanged. When the device is triggered, its output signal will go high, while its input signal will stay low throughout the operation. This creates the desired output signal, which is the active-high version of the original input signal. As long as the input signal is low, the output signal will remain low, as well.

Conclusion

CD74HC123PW is a versatile multivibrator device which can be used in a wide variety of applications. It is an excellent choice for clock generator and timing circuits, thanks to its high speeds and reliability, as well as its compatibility with numerous types of logic families. The device is also easy to use, thanks to its simple working principle.

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