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LM741 Op-Amp Pinout

LM741 · DIP-8 / SOIC-8

The LM741 is the classic general-purpose operational amplifier. Eight pins: two inputs, one output, two supplies, two offset-null pins and one no-connect.

Checked against the KiCad library and datasheet on

LM741 pinout: KiCad footprint Package_DIP:DIP-8_W7.62mm seen from the top, beside the KiCad library symbol Amplifier_Operational:LM741 with every pin number and name
The DIP-8 footprint counts anticlockwise from pin 1 beside the notch, seen from the top. The KiCad symbol puts OUT on pin 6 and the two OFFSET NULL pins on 1 and 5. Exported from the KiCad 9 libraries (Amplifier_Operational:LM741, Package_DIP:DIP-8_W7.62mm). Open full size

Pin by pin

PinNameFunction
1OFFSET NULLTrim pot to null input offset voltage (not connected on some current 741s)
2IN−Inverting input
3IN+Non-inverting input
4V−Negative supply (or ground in single-supply use)
5OFFSET NULLOther end of the offset trim pot
6OUTOutput
7V+Positive supply
8NCNo internal connection

Things that catch people out

  • Offset null uses a 10 kΩ pot between pins 1 and 5 with the wiper to V−. Check your part first: on TI's current uA741C in DIP and SOIC, pins 1 and 5 are not connected and offset nulling is not available.
  • Not rail-to-rail: on ±15 V the inputs stay about 2 V inside each rail, and the output 1 to 2 V (3 to 5 V in the worst case).
  • TI's minimum recommended supply is ±10 V (20 V total), so a 5 V supply is outside its specification.

Putting the LM741 on a PCB

  • Decouple both supply pins, 7 and 4, with 100 nF to ground at the package. A split-supply circuit needs both, not just V+.
  • If you are not trimming offset, leave pins 1 and 5 unconnected. Do not ground them.
  • Keep the feedback resistor between pins 6 and 2 short; the inverting node picks up whatever runs past it.

Common questions

Can the LM741 run from a single 5 V supply?
No. TI's minimum recommended supply is ±10 V (20 V total), and even on ±15 V its inputs need about 2 V and its output 1 to 2 V of headroom at each rail. For 5 V, use an LM358 or a rail-to-rail op-amp.
Is the LM741 pinout the same as the LM358?
No. The 741 is a single op-amp with offset-null pins; the LM358 is a dual. Pin 6 is the 741's output but the LM358's second inverting input, and pin 7 is the 741's V+ but the LM358's second output, so swapping one for the other in a socket does not work.
What is pin 8 on the LM741?
Nothing. It has no internal connection, so it can be left unconnected or tied to a plane.

Building an op-amp stage around the 741? Describe it, say an inverting amplifier with a gain of 10 on ±12 V, and get the schematic and a routed board.

Design an op-amp board →

Sources

Other pinouts