What this supervisor does on the board
The MAX6831TZUT is a multi-voltage supervisor that monitors two independent supply rails. It holds the reset output low when either monitored voltage drops below its threshold, and releases it after a minimum 140ms timeout once both rails are back in spec. The active-low, open-drain output lets you wire-OR it with other reset sources on the same line — common in multi-rail systems where a single supervisor needs to coordinate with a watchdog or a manual reset button.
Temperature grade and where it works
Rated for -40°C to 125°C ambient, this part is comfortable in industrial enclosures, outdoor telecom cabinets, and under-hood automotive zones where the PCB sees engine-bay heat. The SOT-23-6 package keeps the footprint small — useful when board space is tight and you need to squeeze a supervisor next to a power connector or a microcontroller.
Lifecycle and sourcing reality
The MAX6831TZUT is listed as Active in production — no end-of-life notice, no last-time-buy window. That means it is still being manufactured and can be specified into new designs without worrying about an imminent phase-out. Note the RoHS status: this variant is marked RoHS non-compliant, so if your assembly line or customer requires lead-free solder, you will need the RoHS-compliant suffix version of this supervisor. We source this part through independent distribution and can quote it to order against an RFQ; current availability and pricing are confirmed at quote time.