DiodesZetex 74HCT14T14-13, Hex Schmitt Trigger Inverter, 4.5V  5.5 V, 14-Pin TSSOP:

The Diodes Zetex 74HCT14T14-13 is a Hex Schmitt Trigger Inverter IC designed for digital signal processing. It provides six independent inverters with Schmitt-trigger inputs to transform slowly changing or noisy input signals into clean, digital outputs. It is suitable for applications requiring signal conditioning, waveform shaping, and noise elimination.