This part is a kind of semiconductor called TB6612FNG.
Function of this product has Driver IC.
Manufacturers : Toshiba
Image and pinout :

Some of the text within the PDF file :
TB6612FNG Toshiba Bi-CD Integrated Circuit Silicon Monolithic TB6612FNG Driver IC for Dual DC motor TB6612FNG is a driver IC for DC motor with output transistor in LD MOS structure with low ON-resistor. Two input signals, IN1 and IN2, can choose one of four modes such as CW, CCW, short brake, and stop mode. Features • • • • • • • • Power supply voltage; VM = 15 V(Max) Output current; IOUT=1.2 A(ave) / 3.2 A (peak) Output low ON resistor; 0.5Ω (upper+lower Typ. @VM ≥ 5 V) Standby (Power save) system CW / CCW / short brake / stop function modes Built-in thermal shutdown circuit and low voltage detecting circuit Small faced package(SSOP24: 0.65 mm Lead pitch) Response to Pb free packaging 質量: 0.14 g (標準) * This product has a MOS structure and is sensitive to ele [ ... ]
TB6612FNG PDF Datasheet Download
