LM2901YPT STMicroelectronics, Quad Comparator, CMOS/TTL O/P, O/P, 1.3μs 2 → 36 V 14-Pin TSSOP14

The STMicroelectronics Low power quad voltage comparator consists of four independent precision voltage comparators, which are 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 the negative rail even though operated from a single power supply voltage.

Input common mode voltage range includes negative rail
Differential input voltage range equal to the supply voltage
TTL and DTL compatible outputs
MOS and CMOS compatible outputs