STMicroelectronics

HCF40106BEY

HCF40106BEY Description

The HCF40106BEY from STMicroelectronics is a hex Schmitt-trigger inverter belonging to the 4000B series, designed for robust digital logic applications. This through-hole-mounted IC integrates six independent inverters with Schmitt-trigger inputs, ensuring noise immunity and precise signal conditioning. Operating across a wide voltage range (3V to 20V), it supports flexible power supply configurations while maintaining low quiescent current (20 µA max), making it suitable for power-sensitive designs. The device features high noise margins, with input logic levels of 0.9V–4V (Low) and 3.6V–10.8V (High), and delivers symmetrical output drive (6.8mA sink/source). Its 120ns propagation delay (at 15V, 50pF) ensures reliable performance in medium-speed applications.

HCF40106BEY Features

• Schmitt-Trigger Inputs: Enhances noise rejection and signal integrity, ideal for debouncing switches or filtering erratic signals.
• Wide Supply Range (3V–20V): Compatible with TTL and CMOS logic levels, enabling versatile system integration.
• Low Power Consumption: 20 µA max quiescent current minimizes energy usage in battery-operated devices.
• High Output Drive: 6.8mA output current supports direct interfacing with LEDs, relays, or other peripherals.
• Robust Packaging: 14-pin DIP (Tube) ensures durability and ease of prototyping.
• RoHS3 & REACH Compliant: Meets environmental and safety standards for global deployment.

HCF40106BEY Applications

• Signal Conditioning: Cleans up noisy sensor outputs (e.g., encoders, touch panels) using Schmitt-trigger hysteresis.
• Oscillator Circuits: Forms stable RC oscillators for clock generation in timers or pulse-width modulators.
• Switch Debouncing: Eliminates contact bounce in mechanical switches for reliable digital input processing.
• Level Shifting: Bridges logic interfaces between mixed-voltage systems (e.g., 5V to 12V).
• Industrial Control: Used in PLCs, motor drives, and automation systems for robust logic operations.

Conclusion of HCF40106BEY

The HCF40106BEY excels in noise-immune, low-power digital designs, combining Schmitt-trigger reliability with wide voltage compatibility. While marked obsolete, its enduring performance in signal conditioning, oscillation, and debouncing makes it a pragmatic choice for legacy or cost-sensitive projects. Engineers value its simplicity, robustness, and compliance with modern environmental standards, ensuring relevance in industrial, automotive, and consumer electronics.