MAX802M中文资料微处理器监控电路数据手册ADI规格书

描述 Description

The MAX690A/MAX692A/MAX802L/MAX802M/MAX805Lreduce the complexity and number of componentsrequired for power-supply monitoring and battery-controlfunctions in microprocessor (µP) systems. They significantlyimprove system reliability and accuracy comparedto separate ICs or discrete components.
These parts provide four functions:1) A reset output during power-up, power-down, andbrownout conditions.2) Battery-backup switching for CMOS RAM, CMOSµP, or other low-power logic.3) A reset pulse if the optional watchdog timer has notbeen toggled within 1.6sec.4) A 1.25V threshold detector for power-fail warning orlow-battery detection, or to monitor a power supplyother than +5V.
The parts differ in their reset-voltage threshold levelsand reset outputs. The MAX690A/MAX802L/MAX805Lgenerate a reset pulse when the supply voltage dropsbelow 4.65V, and the MAX692A/MAX802M generate areset below 4.40V. The MAX802L/MAX802M guaranteepower-fail accuracies to ±2%. The MAX805L is thesame as the MAX690A except that RESET is providedinstead of active-low RESET.
All parts are available in 8-pin DIP and SO packages.The MAX690A/MAX802L are pin compatible with theMAX690 and MAX694. The MAX692A/MAX802M arepin compatible with the MAX692.

特性 Features

• Precision Supply Voltage Monitor:
• 4.65V for MAX690A/MAX802L/MAX805L
• 4.40V for MAX692A/MAX802M
• Reset Time Delay: 200ms
• Watchdog Timer: 1.6s 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 Active-Low RESET Assertion to VCC = 1V
• 8-Pin SO and DIP Packages

应用 Application

• 电池供电计算机/控制器
• 精确的µP监控
• 智能仪表

简介

MAX802M属于集成电路（IC）的监控器。由ADI制造生产的MAX802M监控器PMIC 监控器用于监视和/或控制电路中的电压轨，能够连接微控制器以维持一定的功率限值。监控器类型包括电池备用电路、监控器、多电压监控器、电源监控器、稳压器/监控器、复位计时器、定序器、简单复位/上电复位、智能开/关控制器、系统管理器、电压检测器和看门狗电路。