General Description
●The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (µP) systems. They significantly improve system reliability and accuracy compared
●to separate ICs or discrete components. These parts provide four functions:
●1) A reset output during power-up, power-down, and brownout conditions.
●2) Battery-backup switching for CMOS RAM, CMOS µP, or other low-power logic.
●3) A reset pulse if the optional watchdog timer has not been toggled within 1.6sec.
●4) A 1.25V threshold detector for power-fail warning or low-battery detection, or to monitor a power supply other than +5V.
●Features
●♦Precision Supply-Voltage Monitor:
● 4.65V for MAX690A/MAX802L/MAX805L
● 4.40V for MAX692A/MAX802M
●♦Reset Time Delay – 200ms
●♦Watchdog Timer – 1.6sec Timeout
●♦Battery-Backup Power Switching
●♦200µA Quiescent Supply Current
●♦50nA Quiescent Supply Current in Battery Backup Mode
●♦Voltage Monitor for Power-Fail or Low-Battery Warning
●♦Power-Fail Accuracy Guaranteed to ±2% (MAX802L/M)
●♦Guaranteed RESETAssertion to VCC= 1V
●♦8-Pin SO and DIP Packages
●Applications
●Battery-Powered Computers and Controllers
●Intelligent Instruments
●Automotive Systems
●Critical µP Power Monitoring
