LM311

Description

The LM311 is a high-speed, versatile voltage comparator IC. Unlike a standard operational amplifier (Op-Amp), it is specifically designed to compare two voltages and flip its output based on which one is higher.

It is legendary in the electronics world for its “open-collector” output, which makes it incredibly easy to interface with different logic levels (like 3.3V, 5V, or even 15V).