This part is a kind of semiconductor called 74HC153.

Function of this product has Dual 4-input multiplexer.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

74HC153; 74HCT153 Dual 4-input multiplexer Rev. 6 11 May 2016 Product data sheet 1. General description The 74HC153; 74HCT153 is a dual 4-input multiplexer. The device features independent enable inputs (nE) and common data select inputs (S0 and S1). For each multiplexer, the select inputs select one of the four binary inputs and routes it to the multiplexer output (nY). A HIGH on E forces the corresponding multiplexer outputs LOW. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. 2. Features and benefits  Input levels:  For 74HC153: CMOS level  For 74HCT153: TTL level  Non-inverting outputs  Separate enable input for each output  Common select inputs  Complies with JEDEC standard no [ ... ]

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