This part is a kind of semiconductor called LC78211.

Function of this product has Analog Function Switch.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number : EN4817A CMOS LSI LC78211, 78212, 78213 Analog Function Switch Applications Function switching under serial data control in amplifiers, receivers, and other electronic equipment Package Dimensions unit: mm 3061-DIP30S [LC78211, 78212, 78213] 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. SANYO: DIP30S Spec [ ... ]

LC78211 PDF Datasheet Download