HEF4047BP – PHILIPS

Overview

The PHILIPS HEF4047BP is a versatile CMOS retriggerable astable multivibrator, expertly designed for generating precise timing pulses in digital systems. Its core functionality lies in its ability to operate as either a monostable (one-shot) or astable (free-running) oscillator, with the output pulse width precisely defined by external RC components. A critical design consideration when using the HEF4047BP in monostable mode is the potential for trigger jitter, which can affect pulse width accuracy if the input trigger signal lacks sufficient slew rate or exhibits significant noise. This component’s robust ESD protection and wide operating temperature range make it a reliable choice for demanding applications.

Key Features

• Monostable and Astable operating modes
• Positive or negative edge triggering (Monostable)
• 50% duty cycle capability (Astable)
• External Rt and Ct for pulse width programming
• True and complemented buffered outputs
• Package: PDIP-16 (19.3 x 7.62 x 3.3 mm)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Precise pulse generation for digital delay lines
• Gated clock signal generation in microcontrollers
• Waveform shaping for analog-to-digital converter front-ends
• Debouncing switch inputs in control systems