900 nA quiescent current — the battery-life spec
That 900 nA figure is the headline rating: it means this part can sit in a battery-powered sensor node or a portable instrument without draining the cell during idle periods. The supply range of 1.6 V to 6.5 V covers single-cell Li-ion (3.0 V to 4.2 V) and two-cell alkaline stacks, so it fits directly on the existing rail without a secondary regulator.
Open-drain output and 3 µs propagation delay
The open-drain output means the comparator sinks current to ground when the non-inverting input crosses the threshold; an external pull-up resistor to the desired logic rail sets the high-level voltage. The typical propagation delay of 3 µs is fast enough for overcurrent detection, battery undervoltage lockout, and zero-crossing in motor-control loops, but not for high-speed switching regulators or RF envelope detection — budget the 3 µs against your system's response-time requirement.
Temperature grade and package
The SC-70-5 package is a 5-pin, 2.0 mm × 2.1 mm footprint — small enough for space-constrained PCBs in handheld or compact designs. Surface-mount assembly is standard; no special thermal management is needed at 900 nA quiescent.