Active production — BOM-fit for automotive ECU power monitoring
The MAX6718AUKSHD3+ is an active-production multi-voltage supervisor from Analog Devices, qualified to AEC-Q100 for automotive applications. It monitors two supply rails against fixed thresholds of 1.313V and 2.925V, asserting an active-low reset when either rail drops below its threshold. The reset output is push-pull (totem pole), eliminating the need for an external pull-up resistor. The 140ms minimum reset timeout provides enough hold time for the downstream MCU to complete its power-on reset sequence before the supervisor releases the reset line.
Automotive temperature grade and package constraints
The SOT-23-5 package (SC-74A footprint) keeps the PCB area to 2.9 mm × 2.8 mm, which fits in space-constrained ECU layouts alongside the monitored regulators. The AEC-Q100 qualification means the part has passed the full suite of automotive stress tests: pre- and post-conditioning, high-temperature operating life (HTOL), temperature cycling, and ESD characterization. No additional PPAP documentation is required for tier-one programs that already accept AEC-Q100 devices.
Sourcing posture for volume and spot buys
No pin-compatible second source or official successor is listed. For dual-voltage monitoring in a SOT-23-5 footprint, the MAX6718AUKSHD3+ is the direct fit; any alternative would require a board spin or different threshold set.