The MAX807LEWE+ is a microprocessor (µP) supervisory circuit with ±1.5% reset accuracy in 16 pin WSOIC package. It provides power supply monitoring, back-up battery switchover and program execution watchdog functions in µP systems. This device reduces complexity and number of components needed to monitor power supply and battery control functions in µP systems. A 70µA supply current makes the MAX807L ideal for use in battery powered equipment while 2ns chip enable propagation delay and 250mA output current capability (20mA in battery-backup mode) make it suitable for larger and higher performance equipment. It has active-high, active-low push-pull reset output. The active-low RESET output is asserted during power-up, power-down and brownout conditions (needs to be in the correct state for VCC down to 1V). The MAX807L is used in back-up battery switchover for CMOS RAM, real time clocks, computers, controllers, intelligent instruments, µPs or other low power logic applications.
Supply voltage range from 0V to 5.5V
Operating temperature range from -40°C to 85°C
Write protection of CMOS RAM or EEPROM
Manual reset input
Two stage power fail warning
Independent watchdog timer
BATT OK status flag indicates that the backup battery voltage is above +2.275V
MaxCap and SuperCap compatible
Precision 4.675V voltage monitoring and 200ms power-OK/reset time delay
Onboard gating of chip enable signals, 2ns CE gate propagation delay
