LM2901D is a quad, general-purpose, low power, single supply comparator IC from STMicroelectronics. It features low supply current (7.5mA) and wide supply voltage range (2 to 36V). It is designed for high accuracy and fast response time and is available in 8-pin PDIP (power DIP) or SOIC (Small Outline IC) packages. LM2901D features four independent voltage comparators, each with a TTL compatible output stage. It can operate from either single or split power supplies and each comparator has an independent common mode voltage range extending up to 10V beyond the supplies. It uses advanced design techniques to provide flexible and consistent performance under varying conditions. It is used for the detection and control of an analog signal. Typical applications include temperature control, light control, motor control, power control, and measurement systems.