Dual comparator with integrated reference — 4 mV hysteresis cleans up noisy thresholds
The MAX9017AEKA+T packs two comparators and a voltage reference into an 8-pin SOT-23 package — one device does the job of three, saving board area on threshold-detection circuits like battery monitors, overvoltage/undervoltage locks, and window comparators. The 4 mV internal hysteresis eliminates output chatter when the input signal crosses the threshold slowly — no external positive-feedback resistor needed. This is the hysteresis value at the comparator inputs, not the reference output ripple. For a battery-powered sensor waking once a second, the comparator's own drain is negligible against the sensor bias. Rail-to-rail CMOS push-pull outputs swing from the positive rail to ground without a pull-up resistor — the 50 mA typical output drive sinks or sources enough current to drive a logic input or a small LED directly.
28 µs propagation delay — fast enough for overvoltage latch, not for switching supply loop
The 28 µs max propagation delay sets the response ceiling — the comparator takes 28 µs from the input crossing the threshold to the output changing state. This is adequate for monitoring supply rails and battery thresholds where the fault persists for milliseconds, but too slow for a switching-regulator feedback loop or a high-speed zero-crossing detector. Input offset voltage is 5 mV max at 5 V supply — the threshold accuracy is dominated by the reference tolerance, not the comparator offset. The 1 pA typical input bias current means the comparator does not load a high-impedance sensor divider even with 1 MΩ source resistance. 80 dB PSRR at DC means the threshold shifts less than 0.1 mV per 100 mV of supply ripple — the comparator stays accurate on a noisy rail without a separate LDO.
Active production — sourced to order against BOM line
RoHS3 compliant per the manufacturer's declaration — no exemption-based conflict with EU RoHS requirements. The SOT-23-8 package is lead-free and compatible with standard reflow profiles. No stock-holding claim; each order is quoted individually.