This part is a kind of semiconductor called LC78211.

Function of this product has Analog Function Switch.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

Ordering number : ENA4817A LC78211, 78212, 78213 CMOS LSI Analog Function Switch http://onsemi.com Applications Function switching under serial data control in amplifiers, receivers, and other electronic equipment. Features  Two sets of eight (or in the LC78213, seven) built-in circuits with three switching configurations available based on differing internal connections.  Control according to serial data sent from a microprocessor, and easy connection to 5 V microprocessors.  Two identical products can be connected to a shared bus due to the provision of a select pin (S).  A reset pin that turns off all analog switches.  A ±20 V withstand voltage rating allows these products to provide a wide dynamic range. Specifications Absolute Maximum Ratings at Ta = 25C Para [ ... ]

LC78211 PDF Datasheet Download