This part is a kind of semiconductor called 74AC573B.

Function of this product has OCTAL D-TYPE LATCH WITH 3 STATE OUTPUT NON INVERTING.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

74AC573 OCTAL D-TYPE LATCH WITH 3 STATE OUTPUT NON INVERTING s s s s s s latch enable input (LE) and an output enable input (OE). While the LE input is held at a high level, the Q s outputs will follow the data input precisely. When the LE is taken low, the Q outputs will be s latched precisely at the logic level of D input data. While the (OE) input is low, the 8 outputs will be DESCRIPTION in a normal logic state (high or low logic level) The AC573 is an advanced high-speed CMOS and while high level the outputs will be in a high OCTAL D-TYPE LATCH with 3 STATE OUTPUT impedance state. NON INVERTING fabricated with sub-micron 2 All inputs and outputs are equipped with silicon gate and double-layer metal wiring C MOS protection circuits against static discharge, giv [ ... ]

74AC573B PDF Datasheet Download