The PC177GR-9LG, PC339GR-9LG are quad 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 PC177GR-9LG which expands temperature type is suited for wide operating ambient temperature use, and PC339GR-9LG is used for general purposes. A DC parameter selection that is compatible to comparators is also available. PC277GR-9LG, PC277MP-KAA, PC393GR-9LG which are dual types with the same circuit configuration are also available as series of comparators. FEATURES