Key ratings and what they mean for the design
The push-pull rail-to-rail output means the comparator can source or sink current to within millivolts of either supply rail. This eliminates the pull-up resistor an open-collector comparator would need, simplifying layout and reducing component count on dense boards. With a quiescent current of 80µA max, this part fits into battery-powered and low-power designs where every microamp counts. The 210ns typical propagation delay is fast enough for many control-loop and signal-conditioning applications, though not intended for high-speed RF or GHz-class switching. The operating temperature range of -40°C to 85°C covers industrial environments, outdoor telecom cabinets, and automotive cabin applications without needing a wider-temperature variant. The 80dB CMRR and PSRR provide decent rejection of common-mode and supply noise for a general-purpose comparator in mixed-signal systems.
Package and footprint
Housed in a 5-pin SOT-23 (SOT-753) package, the MAX987EUK is a compact surface-mount part suited for space-constrained PCBs. The SOT-23 footprint is widely used and easy to hand-assemble or reflow in production.