This part is a kind of semiconductor called FT5506.

Function of this product has True Multi-Touch Capacitive Touch Panel Controller.

Manufacturers : FocalTech

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Some of the text within the PDF file :

FT5506/FT5606/FT5616/FT5816 True Multi-Touch Capacitive Touch Panel Controller INTRODUCTION FT5506, FT5606, FT5616 and FT5816 are the single-chip capacitive touch panel controller with a built-in Micro-Controller Unit (MCU) for supporting especially large-sized mutual capacitive touch panel. They all adopt the mutual capacitance technology, which can realize true multi-touch performance. Being coupled with a mutual capacitive touch panel, FT5506/FT5606/FT5616/FT5816 can implement the user-friendly inputting function and be widely used in various portable devices in large size, such as MIDs, PADs, notebooks, tablet computer, etc. As FT5506, FT5606, FT5616 and FT5816 are in a same series, this datasheet will present them together and list differences among them individually in the following [ ... ]

FT5506 PDF Datasheet Download