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MAX792L, MAX792M, MAX792R, MAX792S, MAX792T：微处理器及非易失存储器监控电路

微处理器和非易失存储器监控电路

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%).

关键特性 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)

MAX792、MAX792L、MAX792M、MAX792R、MAX792S、MAX792T、MAX820、MAX820L、MAX820M、MAX820R、MAX820S、MAX820T：典型工作电路 应用 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

数据手册DataSheet

关键参数

相关产品

• MAX791：微处理器监控电路
• MAX800：微处理器监控电路
• MAX794：3.0V/3.3V可调、微处理器监控电路

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