Low-Power Dual Voltage Comparators STMicroelectronics Low-Power Dual Voltage Comparators consist of two independent low voltage comparators designed specifically to operate from a single supply over a wide range of voltages. Operation of these Low-Power Dual Voltage Comparators from split power supplies is also possible. STMicroelectronics Low-Power Dual Voltage Comparators also have a unique characteristic in that the input common-mode voltage range includes ground even though operated from a single power supply voltage.