Function : LOW POWER DUAL BIPOLAR COMPARATORS
Maker : STMicroelectronics
The LM193, LM293, and LM393 devices consist of two independent low voltage comparators
designed specifically to operate from a single supply over a wide range of voltages. Operation
from split power supplies is also possible.
These comparators also have a unique characteristic in that the input common-mode
voltage range includes ground even though operated from a single power supply voltage.
LM393 Datasheet PDF