The MAX6394US310D3+T: Reset output is active-low, open-drain — it pulls low when the monitored supply drops below threshold, and stays asserted for a minimum 105ms after the rail recovers, giving the system time to stabilize before the processor starts.
Package and board-fit for the reflow line
SOT-143-4 is a four-lead gull-wing package with a 1.3 mm pitch — the footprint is standard, no exotic pad geometry, and the part sits flat with low tombstoning risk when the solder paste stencil aperture is matched to the pad size.
Availability and current pricing confirmed at RFQ time — no stock-holding claim, but the active status means the factory pipeline is open.