Four independent, high gain, internally frequency compensated operational amplifiers make up these circuits. They run on a single power supply and can handle a wide range of voltages. It is also possible to operate from split power supplies, and the low power supply current drain is independent of the magnitude of the power supply voltage.
I have learned an article about LM324AN,
https://www.kynix.com/components/LM324A ... cuits.html
I would like to know about WHERE I can install it.