、微处理器监控电路

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概述

The MAX705–MAX708/MAX813L microprocessor (μP) supervisory circuits reduce the complexity and number of components required to monitor power-supply and battery functions in μ.

The MAX705/MAX706/MAX813L provide four functions:
A reset output during power-up, power-down, and brownout conditions.
An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6 seconds.
A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than +5V.
An active-low manual-reset input.
The MAX707/MAX708 are the same as the MAX705/MAX706,813L is the same as the MAX705, except RESET is provided instead of active-low RESET.

Two supply-voltage monitor levels are available: The MAX705/MAX707/MAX813L generate a reset pulse when the supply voltage drops below 4.65V, while the MAX706/8-pin DIP, SO and μMAX? packages.
关键特性

Available in Tiny μMAX Package
Guaranteed RESET Valid at VCC = 1V
Precision Supply-Voltage Monitor
4.65V in MAX705/MAX707/MAX813L
4.40V in MAX706/MAX708
200ms Reset Pulse Width
Debounced TTL/CMOS-Compatible Manual-Reset Input
Independent Watchdog Timer—1.6s Timeout (MAX705/MAX706)
Active-High Reset Output (MAX707/MAX708/MAX813L)
Voltage Monitor for Power-Fail or Low-Battery Warning
应用/使用

汽车电子
计算机：台式机、工作站和服务器
控制器
的μP监控
智能仪表