2.63V threshold supervisor — single-rail watchdog for MPU power sequencing
The MAX824REXK-T: The 2.63V threshold catches a 3.3V rail dipping below 80% of nominal — a common brownout detection point for 3.3V logic. The reset output is configurable as active high or active low, and the push-pull totem-pole stage drives the reset input of the MPU directly without an external pull-up resistor. The 140ms minimum reset timeout gives the power supply enough settling time after the threshold is crossed before the processor is released.
Active production — single-source supervisor with no direct second-source
The part is marked as RoHS non-compliant — verify your assembly's RoHS exemption allowance before committing the BOM line. No UL or IEC certification documentation is cited in the available record.