MAX807NCWE+

The MAX807NEWE+ 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 MAX807N 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 MAX807N 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 4.575V voltage monitoring and 200ms power-OK/reset time delay
• Onboard gating of chip enable signals, 2ns CE gate propagation delay

Applications

System Monitoring, Portable Devices

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party