MC14584 Hex Schmitt Trigger

MC14584 Schmitt Trigger IC
MC14584 Schmitt Trigger IC
MC14584 Pinout
MC14584 Schmitt Trigger IC
MC14584 Pinout

click on image to enlarge

The MC14584 IC is constructed with MOS P−channel and N−channel enhancement mode devices in a single monolithic structure. MC14584 IC primarily used where low power dissipation and/or high noise immunity is desired.


Pin Description of MC14584:

Pin Number

Pin Name



Schmitt Input Pins

Input pins of the Schmitt trigger


Schmitt Output Pins

Output pins of the Schmitt trigger



Connected to the ground of the system


Vcc (+5V)

Resets all outputs as low. Must be held high for normal operation


Features of MC14584:

  • Schmitt Trigger – Hex Inverter
  • Supply Voltage: 3V to 18V
  • Output current High: -4.2mA
  • Output current Low: 4.2mA
  • Quiescent Current: 1.5 nA
  • Propagation Delay Time: 250 ns
  • Hysteresis voltage: 0.6V typically
  • Typical Rise Time: 100nS
  • Typical Fall Time: 100nS
  • Available in 14-pin PDIP, GDIP, PDSO packages

Note: Complete Technical Details can be found at the MC14584 datasheet given at the end of this page.


Equivalent for MC14584: NTE40106B

Alternatives Schmitt Triggers:  CD40106, TC4584, SN74LS14


Where to use MC14584:

The MC14584B Hex Schmitt Trigger is constructed with MOS P−channel and N−channel enhancement mode devices in a single monolithic structure. 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 “square up” slowly changing waveforms. It can also be used as a logic inverter if needed. A Schmitt trigger is also useful for de-bouncing 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 MC14584

As mentioned earlier MC14584 has six Inverting Schmitt Trigger Gates which can be used as six individual gates. The simplified internal structure can be given as below.

MC14584 Internal Circuit

 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.

The unique and special functionality of a Schmitt trigger is to toggle the output based on the input signal without any noise. This is achieved by using a hysteresis band inside which no switching takes place. Switching Time Test Circuit and Waveform is given below:

MC14584 Test Circuit and Waveform


Applications of MC14584

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


2D Model of MC14584

Dimensions for MC14584 IC is given below. These dimensions of MC14584 are for the SOEIAJ−14 package. If you are using different package IC please refer to the MC14584 datasheet.

MC14584 Dimensions

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