Формирователи импульса сброса MAX697EWE+

Схема контроля микропроцессора , 3В-5.5В питание, выход сброса с активным высоким/низким

The MAX697EWE+ is a microprocessor supervisory circuit in 16 pin WSOIC package. This supervisory circuit reduce the complexity and number of components required for power supply monitoring and battery control functions in microprocessor (µP) systems. It includes µP reset, backup battery switchover, watchdog timer, CMOS RAM write protection and power failure warning. MAX697 device perform functions such as a reset pulse if the optional watchdog timer has not been toggled within a specified time, individual outputs for low line and watchdog fault conditions. The reset time may be left at its default value of 50ms or may be varied with an external capacitor or clock pulses. A separate 1.3V threshold detector for power fail warning, low battery detection or to monitor a power supply other than VCC. The device significantly improves system reliability and accuracy compared to that obtained with separate ICs or discrete components.

• Supply voltage range from 3V to 5.5V
• Operating temperature range from -40°C to 85°C
• Adjustable low line monitor and power down reset
• Power OK
• reset time delay
• Watchdog timer with 100ms, 1.6s or adjustable
• Minimum external component count
• Standby current is 1µA
• Separate monitor for power fail or low battery warning
• Onboard gating of chip enable signals

Области применения

Мониторинг Системы, Переносные Устройства