Three-voltage supervisor in a small SOT-23-8 footprint
The MAX6701TKA monitors three voltage rails: one fixed threshold at 3.08V and two adjustable thresholds set by external resistor dividers.
Voltage thresholds and adjustable monitoring
The fixed 3.08V threshold monitors a 3.3V rail. The two adjustable inputs track a second core voltage and an I/O or auxiliary rail.
Reset behaviour and timing
The active-low reset asserts immediately when any monitored voltage drops below its threshold and stays asserted for a minimum of 120ms after all voltages rise above threshold. That 120ms window is long enough for most switching regulators to reach regulation and for oscillator start-up transients to settle. The push-pull output drives CMOS logic inputs directly without an external pull-up, saving one resistor per reset line.
Temperature grade and deployment environment
Rated for -40°C to 125°C ambient, this part is suited for environments where the PCB sees wide thermal cycling: outdoor telecom cabinets, engine control units, industrial PLCs mounted near hot machinery, and battery management systems in electric vehicles. The SOT-23-8 package keeps the board footprint small — useful when the supervisor must sit close to the monitored rail's decoupling capacitors to minimise noise pickup on the sense traces.
Lifecycle and sourcing posture
It is listed as RoHS non-compliant, so verify your BOM's regulatory requirements before committing — if your assembly line or end-market requires RoHS conformity, this part will need an exemption or a compliant alternative.