Triple-voltage supervisor in a SOT-23-8
The MAX6725KAZWD3-T is a three-channel power supply monitor from Maxim Integrated, built to keep a microprocessor or logic system out of trouble when a supply rail dips. It watches three voltages at once — two fixed thresholds at 1.665 V and 2.313 V, plus one adjustable leg you set with an external resistor divider. When any monitored rail falls below its threshold, the part drives both an active-high and an active-low open-drain reset output, holding the system in reset for a minimum of 140 ms after all rails recover. That timeout gives the supplies and oscillator time to stabilise before the processor starts executing code. The part lives in an SOT-23-8 package and is rated for the industrial temperature range of -40°C to 85°C, making it a fit for motor drives, outdoor telecom gear, and factory-floor controllers where the ambient air gets warm but not scorching.
What the thresholds and timeout mean for the BOM
Both reset outputs are open-drain, so you can wire-OR them with other supervisors or pull them up to whatever logic voltage the downstream reset input expects. The active-high output is useful for parts that need a logic high to start running — some FPGAs and communication controllers work that way. The active-low output covers the conventional microcontroller reset pin.
Lifecycle and compliance
That means you can qualify it into a new design without worrying about a forced migration mid-production. The part is marked RoHS non-compliant, so if your BOM has a RoHS exemption or you're building for a market that doesn't require it, you're fine. For RoHS-mandated builds, you'll need to check the lead-free variant or plan an exemption.