This part is a kind of semiconductor called TC74HC4053AF.

Function of this product has 8-CHANNEL ANALOG MULTIPLEXER/DEMULITIPLEXER.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

TC74HC4051,4052,4053AP/AF/AFT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC4051AP,TC74HC4051AF,TC74HC4051AFT TC74HC4052AP,TC74HC4052AF,TC74HC4052AFT TC74HC4053AP,TC74HC4053AF,TC74HC4053AFT TC74HC4051AP/AF/AFT 8-Channel Analog Multiplexer/Demultiplexer TC74HC4052AP/AF/AFT Dual 4-Channel Analog Multiplexer/Demultiplexer TC74HC4053AP/AF/AFT Triple 2-Channel Analog Multiplexer/Demultiplexer TC74HC4051AP, TC74HC4052AP, TC74HC4053AP The TC74HC4051A/4052A/4053A are high speed CMOS ANALOG MULTIPLEXER/DEMULTIPLEXER fabricated with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. The TC74HC4051A has an 8 channel configuration, the TC74HC4052A has a 4 channel × 2 configuration and [ ... ]

TC74HC4053AF PDF Datasheet Download