MAX792L中文资料微处理器及非易失存储器监控电路数据手册ADI规格书

描述 Description

The MAX792/MAX820 microprocessor (µP) supervisory circuits provide the most functions for power-supply and watchdog monitoring in systems without battery backup. Built-in features include the following: µP reset: Assertion of RESET and active-low RESET outputs during power-up, power-down, and brownout conditions. Active-low RESET is guaranteed valid for VCC down to 1V. Manual-reset input. Two-stage power-fail warning: A separate low-line comparator compares VCC to a preset threshold 120mV above the reset threshold; the low-line and reset thresholds can be programmed externally. Watchdog fault output: Assertion of active-low WDO if the watchdog input is not toggled within a preset timeout period. Pulsed watchdog output: Advance warning of impending active-low WDO assertion from watchdog timeout that causes hardware shutdown. Write protection of CMOS RAM, EEPROM, or other memory devices. The MAX792 and MAX820 are identical, except the MAX820 guarantees higher low-line and reset threshold accuracy (±2%).

特性 Features

• Manual-Reset Input
• 200ms Power OK/Reset Time Delay
• Independent Watchdog Timer-Preset or Adjustable
• On-Board Gating of Chip-Enable Signals
• Memory Write-Cycle Completion
• 10ns (max) Chip-Enable Gate Propagation Delay
• Voltage Monitor for Overvoltage Warning
• ±2% Reset and Low-Line Threshold Accuracy (MAX820, external programming mode)

应用 Application

• 计算机：台式机、工作站和服务器
• 控制器
• 精确的µP监控
• 智能仪表

简介

MAX792L属于集成电路（IC）的监控器。由ADI制造生产的MAX792L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。