CD40106 Hex Schmitt Trigger Inverter

The CD40106 IC consists of six Schmitt-Trigger inputs. Each circuit functions as an inverter with Schmitt-Trigger input. The trigger switches at different points for positive- and negative-going signals. The difference between the positive-going voltage (VP) and the negative-going voltages (VN) is defined as hysteresis voltage (VH).

CD40106 Pinout Configuration

Features of CD40106 Schmitt Trigger Inverter

• Schmitt Trigger – Hex Inverter
• Operating Voltage: 5V
• Low-Level Hysteresis voltage: 0.3V
• High-Level Hysteresis voltage: 3.5V
• Output current High: -1mA
• Output current Low: 1mA
• Quiescent Current: 40 nA
• Propagation Delay Time: 280 ns
• Operating Temperature Range: -55 C to + 125 C
• Available in 14-pin PDIP, GDIP, PDSO packages

Note: Complete Technical Details can be found at the CD40106 datasheet given at the end of this page.

Equivalent for CD40106: MM74C14

Alternatives Schmitt Triggers:  SN74LS14, TC4584, MC14584

Other Hex Inverter: SN7406N

Where to use CD40106 IC

The CD40106 is a hex inverter Schmitt trigger, meaning it has 6 inverted Schmitt triggers inside it. A Schmitt trigger is used to avoid the problem of hysteresis. It can also be used to smoothen a noisy single into a sharp one. Schmitt trigger gate can convert sinusoidal or triangular wave to square wave. It can also be used as a logic inverter if needed. A Schmitt trigger is also useful for debouncing a push button or other noisy input devices.

So if you are looking for an IC which can help you to get of switching noise or to create sharp square wave signals based on an input signal then this IC could be the right choice or you.

How to Use CD40106 IC

As mentioned earlier CD40106 has six INVERTING SCHMITT TRIGGER GATES which can be used as six individual gates. CD40106 internal structure is given below:

Each of these 6 gates can be used individually based on our application. Since the gates are inverting we can also combine two gates to form a non-inverting gate.  The input signal can be a noise square wave or any signal wave that oscillates between the low and high hysteresis voltage.

Applications of CD40106

• Noise removing circuits
• Debouncing circuits
• Hysteresis controller
• Dead band filter

2D Model of CD40106

Dimensions for CD40106 IC is given below. These dimensions are for the PDIP package. If you are using different package IC please refer to CD40106 datasheet.