This part is a kind of semiconductor called BA10339.

Function of this product has Quad comparator.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Standard ICs Quad comparator BA10339 / BA10339F / BA10339FV The BA10339, BA10339F, and BA10339FV each consist of four comparators in a single package. The open collector output allows a wired OR connection. These products feature a wide range of operating power supply voltages, from 3 to 36V with single power supply operation, and from ±1.5 to ± 18V with dual power supply operation. Available packages include 14-pin DIP (BA10339), 14-pin SOP (BA10339F), and 14-pin SSOP-B (BA10339FV). Features • 1) Wide range of operating voltages (single power supply: 3 to 36V; dual power supply: ± 1.5 to ± 18V) 2) Low current dissipation (0.8mA typ., VCC = 5V) 3) Low input offset current (5nA typ., VCC = 5V) and input offset voltage (2mV typ., VCC = 5V) 4) Wide common-mode input voltage range (0 [ ... ]

BA10339 PDF Datasheet Download