Single-supply comparator with a built-in reference
The Maxim MAX921CSA+ is a single-supply comparator that integrates a voltage reference on-chip, saving an external reference IC and its associated PCB area. It delivers a 50mV hysteresis band, which eliminates output chatter on slow-moving input signals without external positive feedback resistors. The 5µA maximum quiescent current makes this part a fit for battery-operated threshold detectors, window comparators, and low-power sensor interfaces where every microamp counts.
The 12µs max propagation delay sets the response speed of the comparator.