The device hysteresis transfer curve is shown below. This curve is a function of three components: VTH, VOS, and VHYST:
VTH is the actual set voltage or threshold trip voltage.
VOS is the internal offset voltage between VIN+ and VIN–. This voltage is added to VTH to form the actual trip point at which the comparator must respond to change output states.
VHYST is the internal hysteresis (or trip window) that is designed to reduce comparator sensitivity to noise.