The Maxim Integrated MAX6381LT16D3+ is a single low-voltage power supply monitor designed to assert a reset signal when the monitored voltage drops below a factory-trimmed threshold of 1.58V. The reset output is active low and push-pull, so it drives a clean logic level without needing an external pull-up resistor. It monitors a single voltage rail, and the 1.58V threshold is a natural fit for 1.8V nominal rails — the monitor triggers before the rail drops below the minimum operating voltage of most 1.8V logic.
Housed in a 6-WFDFN package (supplier device package 6-uDFN, 1.5mm x 1.0mm), this is a small surface-mount monitor that fits tight PCB layouts. The 6-pin footprint is common across the MAX6381 family, so swapping threshold variants within the series is a direct BOM change — no layout revision needed.