This part is a kind of semiconductor called 74AC14B.

Function of this product has HEX INVERTER.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

74AC14 • 74ACT14 Hex Inverter with Schmitt Trigger Input November 1988 Revised December 1999 74AC14 • 74ACT14 Hex Inverter with Schmitt Trigger Input General Description The 74AC14 and 74ACT14 contain six inverter gates each with a Schmitt trigger input. They are capable of transforming slowly changing input signals into sharply defined, jitterfree output signals. In addition, they have a greater noise margin than conventional inverters. The 74AC14 and 74ACT14 have hysteresis between the positive-going and negative-going input thresholds (typically 1.0V) which is determined internally by transistor ratios and is essentially insensitive to temperature and supply voltage variations. Features s ICC reduced by 50% s Outputs source/sink 24 mA s 74ACT14 has TTL-compatible inputs Ordering [ ... ]

74AC14B PDF Datasheet Download