What do the OUT Low Voltage and OUT High Voltage parameters in the MAX9634T datasheet mean?

OUT Low and OUT High reflect the maximum output range of the device. The output voltage of the device is limited to the voltage of the power supply. These two parameters primarily reflect the linear output range of the device. For example, if VOL is 7.5mV, the output voltage will not be 0 even if input voltage is 0. The lowest output voltage would be 7.5mV.