General Description
The MAX6400–MAX6405 is a family of ultra-low power microprocessor (µP) supervisory circuits used for monitoring battery, power-supply, and regulated system voltages. Each device contains a precision bandgap
reference comparator and is trimmed to specified trip threshold voltages. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring system voltages from 2.5V to 5.0V. A manual reset input is also included.

FEATUREs
♦ Ultra-Small 4-Bump (2 ✕ 2) Chip-Scale Package, (Package Pending Full Qualification—Expected Completion Date 6/30/01. See UCSP Reliability Section for More Details.)
♦ 70% Smaller Than SC70 Package
♦ Ultra-Low 500nA (typ) Supply Current (MAX6400/MAX6401/MAX6402)
♦ Factory-Trimmed Reset Thresholds from 2.20V to 4.63V in Approximately 100mV Increments
♦ ±2.5% Threshold Accuracy -40°C to +85°C
♦ Factory-Set 100ms (min) Reset Timeout Period
♦ Manual Reset Input
♦ Guaranteed Reset Valid to VCC = 1.0V
♦ Three Reset Output Logic Options: Active-Low Push-Pull, Active-High Push-Pull, and Active-Low Open-Drain.
♦ Immune to Short VCC Transients
♦ No External Components