This part is a kind of semiconductor called UPC177GR-9LG.

Function of this product has SINGLE POWER SUPPLY QUAD COMPARATORS.

Manufacturers : NEC

Image and pinout :

Some of the text within the PDF file :

DATA SHEET BIPOLAR ANALOG INTEGRATED CIRCUIT μ PC177GR-9LG, μ PC339GR-9LG SINGLE POWER SUPPLY QUAD COMPARATORS DESCRIPTION The μ PC177GR-9LG, μ 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 μ PC177GR-9LG which expands temperature type is suited for wide operating ambient temperature use, and μ PC339GR-9LG is used for general purposes. A DC parameter selection that is compatible to comparators is also available. μ PC277GR-9LG, μ PC277MP-KAA, μ [ ... ]

UPC177GR-9LG PDF Datasheet Download