Dual comparator for the field kit — wide temp, wide supply
The LM2903PSRG4: It runs on a single supply from 2V to 36V, or split supplies from ±1V to ±18V, which means it can sit on a 5V logic rail, a 12V industrial bus, or a 24V automotive line without a separate regulator.
Output flexibility — drives logic or loads directly
Output type is configurable for CMOS, MOS, open-drain, or TTL levels, so this comparator can feed a microcontroller GPIO, a relay driver, or an optocoupler without a translator chip. Each output sinks up to 20mA typical, enough for a small relay or LED indicator. Quiescent current maxes at 2.5mA per device — not a low-power part, but fine for always-on industrial control where the supply is already there.
Maximum input offset voltage is 7mV at 30V supply, and input bias current is 0.25µA max at 5V. These are standard figures for a general-purpose comparator — adequate for threshold detection, zero-crossing, and window comparators. Not a precision part for microvolt-level sensing, but it will trip reliably on a 50mV sense resistor drop.
No last-time-buy notice, no end-of-life risk on the current horizon.