Dual comparator with a built-in voltage reference — one less IC on the BOM
The Maxim Integrated MAX933CPA+ is a dual comparator that integrates a precision voltage reference on-chip, saving the external reference IC and its support passives. Each of the two comparators includes 50 mV of built-in hysteresis, which eliminates output chatter on slow-moving input signals without external positive feedback resistors. The CMOS/TTL-compatible outputs sink or source directly to logic inputs. Supply range spans 2.5 V to 11 V single supply (or ±1.25 V to ±5.5 V dual). Maximum quiescent current is 6 µA. Packaged in an 8-pin DIP (0.300" width, 7.62 mm pitch) with through-hole mounting — a breadboard-friendly footprint that also suits low-volume production where hand-assembly or socketing is preferred. Operating temperature range is 0°C to 70°C, rated for commercial indoor environments such as bench instrumentation, office equipment, and industrial control panels with climate control.
12 µs propagation delay — design for the speed you actually need
The 12 µs maximum propagation delay is the headline speed rating. This is not a high-speed comparator for switching power supply feedback loops or data recovery — those applications need sub-microsecond parts. But for thermal shutdown, battery undervoltage lockout, window comparators, or any low-frequency threshold detection, 12 µs is more than adequate and the low power penalty is minimal. Input offset voltage is specified at 10 mV max at 5 V, and the typical CMRR and PSRR are both 80 dB. The integrated reference means the threshold accuracy depends on the internal reference stability, not an external resistor divider — one less tolerance stack to budget.
Active production, no end-of-life concern
ROHS3 compliant. Through-hole DIP packaging means it remains a viable choice for legacy designs, socketed prototypes, and low-volume builds where surface-mount rework is not available.