This device consists of two independent low power voltage comparators designed specifically to operate from a single supply over a wide range of voltages. Operation from split power supplies is also possible. These comparators also have a unique characteristic: the input common-mode voltage range includes the negative rail even though operated from a single power supply voltage.
The ST LM2903DT is a Low Power Dual Voltage Comparator. It comes in a SOIC 8 pin package.