HCF4047BEY

Multivibrators Overview

The HCF4047BEY is a low-power monostable/astable multivibrator integrated circuit from the 4000B series, manufactured by STMicroelectronics. It operates on a single supply voltage ranging from 3V to 20V and supports an operating temperature range of -55°C to +125°C. The device features buffered true and complemented outputs (Q, Q) and an oscillator output. It requires only one external resistor and capacitor for timing control. Propagation delay varies with supply voltage, typically reaching 125ns at 15V.

Multivibrators Feature Summary

• Supports both astable free-running and positive/negative edge-triggered monostable operation modes.
• Includes retriggering capability and external countdown options for extended pulse duration control.
• Features buffered inputs and standardized symmetrical outputs for reliable signal interfacing.

Multivibrators Applications

• Timing circuits requiring precise pulse width generation
• Frequency division and counting applications
• Clock generation systems

Multivibrators Procurement Notes

Verify component authenticity through authorized channels as this part number may be obsolete. Confirm package integrity upon receipt, specifically checking for physical damage to the 14-DIP housing. Ensure environmental compliance documentation matches project requirements before final integration into manufacturing workflows.

Multivibrators Selection Notes

Select this component when a CMOS multivibrator with wide supply voltage flexibility is required. Consider the specific propagation delays associated with different supply voltages for high-speed timing accuracy. Evaluate the need for retriggering or external counting features against alternative logic families if power consumption is a critical constraint.

Multivibrators Part Context

This device belongs to the HCF4047B family, which utilizes Metal Oxide Semiconductor technology. It is designed to meet JEDEC JESD13B standard specifications for B Series CMOS devices. The EY suffix indicates a plastic DIP package configuration suitable for through-hole mounting in industrial and commercial electronic assemblies.

Multivibrators Replacement Considerations

CD4047BE is a direct substitute available from Texas Instruments.

Multivibrators FAQ

How is the monostable pulse width determined?

The pulse width is determined by the values of the external resistor connected between R-Timing and RC-Common terminals and the external capacitor connected between C-Timing and RC-Common terminals.

What is the function of the External Reset input?

The External Reset input terminates the output pulse at any time and ensures no output pulse occurs during an ON power condition.