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MC33171 General Purpose Op-Amp

The MC33171 is a Single Supply 3.0 V to 44 V, Low Power Operational Amplifier. This IC operates at 180 µA per amplifier and offers 1.8 MHz of gain-bandwidth product and 2.1 V/s slew rate without the use of JFET device technology.


MC33171 IC Pin Configuration

Pin Number

Pin Name



Offset NULL

Used to set offset voltage if required


Inverting Input (IN-)

The Inverting pin of the Op-Amp


Non- Inverting Input (IN+)

The Non-Inverting Pin of the Op-Amp



Connected to negative rail or ground



Output pin of the Op-Amp



Connected to the positive rail of supply voltage 



Not Connected


MC33171 features and specifications 

  • Supply Voltage: 4V to 44 V
  • Output Current per Channel: 27 mA
  • Number of Channels: 1 Channel
  • GBP - Gain Bandwidth Product: 2.1 MHz
  • SR - Slew Rate: 2 V/us
  • CMRR - Common Mode Rejection Ratio: 80 dB
  • Ib - Input Bias Current: 100 nA
  • Vos - Input Offset Voltage: 5 mV
  • Operating Supply Current: 250 uA
  • Low Total Harmonic Distortion: 0.03%
  • Excellent Phase Margin: 60°
  • Excellent Gain Margin: 15 dB
  • Output Short Circuit Protection

Note: Complete Technical Details can be found at the MC33171 datasheet given at the end of this page.


Equivalent for MC33171UA741, CA3140, TL081

Alternatives Audio Amplifiers: LM4871, AD620, IC6283, JRC45558, LF351N


Where to use the MC33171 Op amp

The MC33171 JFET-input operational amplifier is designed to offer a wider selection than any previously developed operational amplifier. MC33171 is a single package Op-Amp that has been widely used for quite a long time now. This Op-Amp can be used for many general purpose applications like Voltage follower, Buffers, Comparators, Amplifiers, Adders and much more. So if you looking for a plain old Op-Amp just for some basic circuit design then this IC might be the right choice for you.


How to use MC33171 Op amp

An Inverting Amplifier Application circuit from the MC33171 datasheet is given below. You only need two resistors to use MC33171 as an inverting amplifier.

MC33171 Op-Amp Application Circuit 

An inverting amplifier takes a positive/negative voltage on the inverting input pin and makes it a negative/positive voltage of the same magnitude. Output at the VOUT pin is feedback to input through the feedback resistor.

The input and output voltages can be calculated as,

Vin = I.R1​
Vout = -I.Rf


Applications of MC33171 IC

  • Sample and Hold Amplifiers
  • Peak Detectors
  • Active Filters
  • Comparators
  • Interface in 5V TTL Systems and Other Low Supply Voltage Systems
  • All Standard Operational Amplifier Applications
  • Function Generators


2D-Model of MC33171 IC

Dimensions for MC33171 IC is given below. These dimensions are for the 8-Pin PDIP package. If you are using different package IC please refer to the MC33171 datasheet.

MC33171 Op-Amp Dimensions

Component Datasheet

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