LM741 pinout and sample LM741 Projects


LM741 series operational amplifiers are designed for general purpose use. It has overload protection feature at its entrance and exit. In many applications, the 709C, 748 and MC1439 can be used interchangeably. You will learn LM741 Pinout in this page.

Where is LM741 used?

  • Comparators
  • Multivibrators
  • DC Amplifiers
  • Summing Amplifiers
  • Integrator or Differentiators
  • Active Filters

LM741 Pinout

LM741 Pinout

The LM741 comes in an 8-pin body. From these to the V + and V- pins
Voltage is applied in the range of ± 5V and ± 18V.

  • Pin 1—Offset null
  • Pin 2—Inverting input
  • Pin 3—Non-Inverting input
  • Pin 4—Negative Supply
  • Pin 5—No connection
  • Pin 6—Output
  • Pin 7—Positive Supply
  • Pin 8—Offset null

LM 741 Features

  • Supply voltage range: ±5V to ±18V
  • Input offset voltage: 2mV to 6mV
  • Input Impedance: 300KΩ to 2MΩ
  • Power consumption: 50mW to 85mW
  • Supply current: 1.7mA to 2.8mA
  • Power Dissipation: 0.5W
  • Differential input voltage:±30V
  • Max Input voltage:±15V
    (should not exceed the power supply voltage)
  • Output short circuit time: none
  • Operating temperature: 0 to 70°C
  • Voltage Gain: 20,000 to 200,000
  • Input offset voltage: 2mV to 6mV
  • Input Impedance: 300KΩ to 2MΩ
  • Bandwidth: 500KHz to 1.5MHz
  • Slew rate: 0.5V per uS

LM741 example projects

1- Lm741 comparator circuit


The voltage falling on the LDR and the voltage falling on the potentiometer are compared. Since the resistance of the LDR will increase in the dark, the LM741 will output. The led will light up.

2- Lm741 Multivibrators circuit

Source: http://www.learningaboutelectronics.com/Articles/Astable-multivibrator-circuit-with-an-LM741-op-amp.php

Oscillators and signal generators are counted in electronic electronics. Because the operation of a digital clock, the operation of an inverter circuit, the operation of various transmitters depend on the oscillators. Oscillators form the basic structure of that circuit

Oscillators; They are called signal generators or signal sources. Oscillators are positive feedback amplifiers. Oscillation or variable signal generation is achieved by applying positive feedback to the amplifiers. There are four most common types of variable signs. These are square, triangle, sawtooth and sinus marks. Sign sources are also called by the names they produce, as well as by different names.
Astable multivibrator is a square wave oscillator. The astable multivibrator shown in the figure is similar to a dial gauge other than the capacity element at its inlet. By creating a voltage divider, R1 and R2 apply a certain ratio of the output voltage to the + input of the operational amplifier.

3- DC Difference Amplifiers wtih LM741

Source: http://www.learningaboutelectronics.com/Articles/Difference-amplifier-circuit.php


if we feed 5V into V+ and 3V into V-, then the output voltage will be 2V (5V – 3V= 2V).


4- Summing Amplifiers with LM741




5- Integrator opamp circuit with LM741

5- Active low pass filter circuit with LM741


LM741 Low Pass Filter


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