The Maxim Integrated MAX987EUK+T is a single general-purpose comparator in a SOT-23-5 package. The 210 ns propagation delay keeps it responsive for signal-conditioning loops in portable instruments, battery monitors, and threshold detectors. Quiescent current maxes at 96 µA, so it won't drain a coin cell overnight.
210 ns delay and 96 µA quiescent — the trade-off
At 210 ns max propagation delay, this part is fast enough for most low-frequency threshold and zero-crossing circuits but not for high-speed comparator applications like clock recovery or fast ADC front-ends. The 96 µA quiescent current is the trade-off: you get microamp-level power consumption at the cost of response time. For a battery-powered over-voltage latch or a window comparator in a handheld meter, that exchange works.
Rail-to-rail I/O and input specs
The rail-to-rail input range lets you sense signals near the supply rails — useful when the reference is close to ground or the positive rail. Input bias current is 1 pA at 5.5 V, so high-impedance sources like photodiode outputs won't be loaded down. Hysteresis of ±2.5 mV is built in, reducing chatter on slow-moving signals without external feedback resistors.
The SOT-23-5 footprint is small enough for dense PCBs but still hand-solderable for prototyping.
For BOM planning, it's a safe line item — no LTB risk in the near term.