4.63V threshold supervisor for 5V rails
The MAX6821LUK+T: The 140ms timeout ensures the core supply has settled before the processor starts executing code, covering the power-up transient of a typical bulk capacitor bank.
A motor-drive control board sitting next to a hot inverter or a battery-management module under the hood both stay within the operating range without derating. Housed in a 5-pin SOT-23, the footprint matches the industry-standard SC-74A land pattern. The SOT-23-5 package is a common choice for compact supervisor placement near the processor's supply pin, keeping the sense trace short and reducing noise coupling into the threshold comparator.