leading-out terminal
The most basic components of an operational amplifier are in-phase input, inverting input, output, positive power supply, and negative power supply. These are the five leads of the op amp. Some operational amplifiers have fewer or more than five legs. Especially double op amp, four op amp, etc. There will be eight pins, 14 pins. Because their power pins are shared.
5 active device pins: 2 inputs, 2 power pins, and 1 output. These five pins are suitable for many applications using operational amplifiers.