Three-rail supervisor in a SOT-23-6 — what it covers
The Maxim MAX6719UTYHD3 is a multi-voltage supervisor that monitors three separate voltage rails and asserts a common active-low reset when any monitored rail falls below its threshold. It tracks 1.313 V, 2.188 V, and a third adjustable threshold set by an external resistor divider, covering the core, I/O, and auxiliary supplies common in dual- or triple-supply designs. The open-drain output allows wired-OR connection with other supervisors or a system power-good bus.
Thresholds and reset timing — fit for the BOM
The fixed 1.313 V threshold suits low-voltage core rails, while the 2.188 V threshold matches I/O supplies. The adjustable channel handles any remaining rail via two resistors.
Lifecycle and sourcing
The MAX6719UTYHD3 carries an active lifecycle status, so there is no last-time-buy clock running. The part is RoHS non-compliant per the original release, which matters for builds that must meet RoHS directives — verify your exemption or plan for a compliant alternate if needed.