CD4098BE

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Introduction

CD4098BE is a dual 4-input single-output monostable multivibrator, which is used as a timing and control device. It integrates two monostable multivibrators in one package and provides two independent triggering sources. Its operations include delay triggering, frequency division, pulse width control, sequence control, etc.

Application Field

CD4098BE is widely used in a variety of applications such as frequency division, pulse width control, and sequence control. It is optimal for applications where pulse timing, pulse width control, and/or sequencing capabilities are desired.

The device has been used extensively in time delay networks, pulse-width modulated (PWM) circuits, frequency division networks, oscillators, crystal oscillators, and sequential motor driving systems. It is also suitable for use in LED and other light sensitivity systems.

Working Principle

The multivibrator consists of two transistors and two resistors connected in a symmetrical circuit with two independent trigger sources. The two transistors act as the switch and the resistors act as the load for the switch. When triggered, the transistors will switch ON and OFF providing a delay time before the output returns to its original state. This delay time is determined by the resistor values and the power supply voltage. Thus, CD4098BE allows for varying the time delay and pulse width as per the application.

When the trigger source (either from the internal circuit or from an external source) changes from High to Low, the triggered transistor connects to the circuit and the load resistor is discharged. This triggers the opposite transistor, changing the state at the output terminal. When the trigger source returns to High, the opposite transistor connects to the circuit and the load capacitor discharges slowly and the output changes back to its original state. This process is repeated each time the trigger source changes.

Conclusion

CD4098BE is a versatile and powerful dual monostable multivibrator that is well suited for a wide variety of applications. Its two independent trigger sources and adjustable time delay and pulse width make it ideal for tasks such as frequency division, pulse width control, and sequence control. The ability to vary the time delay and pulse width make it a great choice for use in time delay networks, PWM circuits, frequency division networks, oscillators, crystal oscillators, and sequential motor driving systems.

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