This part is a kind of semiconductor called TC4053BFN.

Function of this product has SINGLE 8-CHANNEL MULTIPLEXER/DEMULTIPLEXER.

Manufacturers : Toshiba

Image and pinout :

Some of the text within the PDF file :

TC4051,4052,4053BP/BF/BFN/BFT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC4051BP, TC4051BF, TC4051BFN, TC4051BFT TC4052BP, TC4052BF, TC4052BFN, TC4052BFT TC4053BP, TC4053BF, TC4053BFN, TC4053BFT TC4051B Single 8-Channel Multiplexer/Demultiplexer TC4052B Differential 4-Channel Multiplexer/Demultiplexer TC4053B Triple 2-Channel Multiplexer/Demultiplexer Note: xxxFN (JEDEC SOP) is not available in Japan. TC4051BP, TC4052BP, TC4053BP TC4051B, TC4052B and TC4053B are multiplexers with capabilities of selection and mixture of analog signal and digital signal. TC4051B has 8 channels configuration. TC4052B has 4 channel × 2 configuration and TC4053B has 2 channel × 3 configuration. The digital signal to the control terminal turns “ON” the corresponding switch of each chan [ ... ]

TC4053BFN PDF Datasheet Download