The PC277GR-9LG, PC277MP-KAA, PC393GR-9LG are dual comparators which are designed to operate for a single power supply. It includes features of low-voltage operation, a common-mode input voltage that range from V- (GND) level, an open collector output, and low current consumption. Furthermore, these products can operate on a split power supply and be used for an extensive comparison of various voltages. The PC277GR-9LG, PC277MP-KAA which expands temperature type is suited for wide operating ambient temperature use, and PC393GR-9LG is used for general purposes. A DC parameter selection that is compatible to comparators is also available.