CD 40106 BE Hex Schmitt Trigger Inverter IC – DIP 14

Description

The CD40106BE Hex Schmitt Trigger Inverter IC, manufactured by Texas Instruments, is an incredibly versatile digital logic component belonging to the classic 4000-series CMOS family. Housed in a standard 14-pin Dual Inline Package (DIP), this integrated circuit contains six independent inverter gates, each equipped with Schmitt trigger inputs. This specialized input architecture provides hysteresis, meaning it has distinct, separate voltage thresholds for turning ON (HIGH) and turning OFF (LOW).

Available at Tomson Electronics, the CD40106BE is a must-have for any hardware engineer or hobbyist. Its primary superpower is taking slow-changing, noisy, or distorted analog signals and converting them into sharp, clean, jitter-free digital square waves. Featuring a wide operating voltage range of 3V to 18V, it interfaces effortlessly with everything from 3.3V microcontrollers to legacy 15V industrial logic boards, making it the industry standard for button debouncing and simple oscillator circuits.

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Specifications

• Manufacturer: Texas Instruments (TI)
• Model: CD40106BE
• Logic Family: 4000 Series CMOS
• Logic Function: Hex (6x) Inverter with Schmitt Trigger Inputs
• Package Type: 14-Pin DIP (Through-hole)
• Operating Supply Voltage (Vdd): 3V to 18V DC
• Hysteresis Voltage (Typical): 0.9V at 5V Vdd / 2.3V at 10V Vdd
• Operating Temperature Range: -55°C to +125°C

Datasheet

Download CD40106BE (Texas Instruments) Datasheet PDF

Applications

• Switch Debouncing: Eliminating the rapid, noisy mechanical bouncing of pushbuttons and switches to send a single, clean pulse to a microcontroller.
• Waveform Shaping: Converting sine waves, triangle waves, or degraded analog signals into crisp, fast-rising digital square waves.
• Simple Oscillators: Building highly reliable RC astable multivibrators (clock generators) using only a single resistor and capacitor per gate.
• Noise Immunity: Acting as a protective buffer stage in high-noise electrical environments to prevent false logic triggering.

Frequently Asked Questions (FAQ)

Q: What makes a Schmitt Trigger different from a regular inverter (like the CD4069)?
A: A regular inverter has a single voltage threshold; if a noisy signal hovers near that threshold, the output will rapidly oscillate and glitch. A Schmitt trigger has hysteresis (two different thresholds). Once a rising signal crosses the upper threshold, the output flips. It won't flip back until the signal drops completely below a much lower threshold. This creates a "dead zone" that ignores electrical noise, guaranteeing a clean output transition.

Q: How do I wire this IC to debounce a momentary pushbutton?
A: You can create a simple hardware debouncer by wiring your pushbutton with a pull-up resistor and placing a small capacitor in parallel with the switch (forming an RC delay circuit). Feed the junction of the switch and capacitor into the input of the CD40106BE. The Schmitt trigger will square up the slow charge/discharge curve of the capacitor, giving your microcontroller a perfect, bounce-free digital edge.

Q: Do I need to connect the input pins of the inverters I am not using?
A: Yes! As with all CMOS ICs, you must never leave unused input pins floating. A floating input can act like an antenna, picking up stray noise and causing the internal gate to switch rapidly, which draws excess current and creates heat. Always tie the unused inputs directly to Ground (LOW) or Vdd (HIGH).

Package Includes

• 1 × CD40106BE Hex Schmitt Trigger Inverter IC (Texas Instruments) – DIP-14