LP339 consists of four independent voltage compara- tors designed specifically to operate from a single power supply and draw typically 60 µA of power supply drain cur- rent over a wide range of power supply voltages. Operation from split supplies is also possible and the ultra-low power supply drain current is independent of the power supply volt- age. These comparators also feature a common-mode range which includes ground, even when operated from a single supply. Applications include limit comparators, simple analog-to-digital converters, pulse, square and time delay generators; VCO’s; multivibrators; high voltage logic gates. The LP339 was specifically designed to interface with the CMOS logic family.