The LM397MF/NOPB is a single general purpose Voltage Comparator with an input common mode that includes ground. The LM397 is designed to operate from a single 5 to 30V power supply or a split power supply. Its low supply current is virtually independent of the magnitude of the supply voltage. The comparator features an open-collector output stage. This allows the connection of an external resistor at the output. The output can directly interface with TTL, CMOS and other logic levels, by tying the resistor to different voltage levels (level translator).