View max6406-max6411 datasheet:

19-2041; Rev 1; 8/01 X Voltage Detectors in 4-Bump (2 2) Chip-Scale Package General Description Features The MAX6406–MAX6411 is a family of ultra-low power X Tiny 4-Bump (2 2) Chip-Scale Package, (Package circuits used for monitoring battery, power-supply, and Pending Full Qualification—Expected Completion regulated system voltages. Each detector contains a Date 6/30/01. See UCSP Reliability Section for precision bandgap reference comparator and is More Details.) trimmed to specified trip threshold voltages. These 70% Smaller Than SC70 Packages devices provide excellent circuit reliability and low cost by eliminating external components and adjustments Ultra-Low 500nA Supply Current when monitoring system voltages from 2.5V to 5.0V. A (MAX6406/MAX6407/MAX6408) manu