Single general-purpose comparator in SOT-23-5
The MAX988EUK+T is a single general-purpose comparator from Analog Devices, housed in a 5-pin SOT-23-5 package (SC-74A, SOT-753). It compares two analog voltages and outputs a digital logic level indicating which is higher. With a 210 ns maximum propagation delay, this comparator handles moderate-speed threshold detection and zero-crossing tasks without the tight timing constraints of a high-speed part. Quiescent current maxes out at 96 µA, keeping the power budget lean for battery-operated or loop-powered designs where every microamp counts.
Supply range and output flexibility
Its output stage supports CMOS, open-drain, rail-to-rail, and TTL logic levels, so it can drive a microcontroller GPIO, a logic gate input, or a wired-OR interrupt line without extra level translation. The ±2.5 mV internal hysteresis cleans up noisy input transitions, preventing output chatter when the signal crosses the threshold slowly.
Noise rejection and input characteristics
Typical CMRR and PSRR both sit at 80 dB, meaning common-mode voltage shifts and supply ripple are attenuated by a factor of 10,000 — useful when the comparator shares a rail with a switching regulator or a motor driver. Maximum input offset voltage is 5 mV at 5.5 V, which sets the threshold accuracy floor — factor this into the trip-point resistor divider tolerance budget.