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双路、超低电压、SOT23封装、微处理器监控电路,带有手动复位及看门狗定时器

产品详情

主要特征

应用/用途

Parametric specs for Supervisors (2 Monitored Voltages)
Reset Thresh. (V) 0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active Low
Push-Pull
Interface Factory Fixed
tRESET (min) 85ms to 300ms
Watchdog Feature Input (WDI)
Watchdog Timeout 1s to 2s
Supervisor Features Adjustable Reset Input
Manual Reset
ICC (µA) (max) 16
Package/Pins SOT23/6
Budgetary
Price (See Notes)
2.15
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简化框图

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参量

Parametric specs for Supervisors (2 Monitored Voltages)
Reset Thresh. (V) 0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active Low
Push-Pull
Interface Factory Fixed
tRESET (min) 85ms to 300ms
Watchdog Feature Input (WDI)
Watchdog Timeout 1s to 2s
Supervisor Features Adjustable Reset Input
Manual Reset
ICC (µA) (max) 16
Package/Pins SOT23/6
Budgetary
Price (See Notes)
2.15

主要特征

  • Monitor Primary VCC Supplies from +1.8V to +5.0V and Secondary VCC2 Supplies from +0.9V to +2.5V
  • User Adjustable RESET IN Down to +0.63V (MAX6826/MAX6827/MAX6828)
  • 140ms (min) Reset Timeout Delay
  • 1.6s Watchdog Timeout Period
  • Manual Reset Input
  • Three Reset Output Options
    • Push-Pull active-low RESET
    • Push-Pull RESET
    • Open-Drain active-low RESET
  • Guaranteed Reset Valid Down to VCC = +1.0V
  • Immune to Short Negative VCC Transients
  • No External Components
  • Small 6-pin SOT23 Packages

应用/用途

  • 精确的µP监控
  • 嵌入式控制器
  • 智能仪表
  • 多电压系统
  • 便携式/电池供电设备

描述

The MAX6826—MAX6831 are ultra-low-voltage microprocessor (µP) supervisory circuits designed to monitor two power supplies and have manual reset and watchdog input functions. These devices assert a system reset if any of the monitored supplies fall below the preprogrammed thresholds, and maintain reset for a minimum timeout period after the supplies rise above the threshold. Microprocessor supervisors significantly improve system reliability and accuracy compared to separate ICs or discrete components. These devices monitor primary voltages from +1.8V to +5.0V and secondary voltages from +0.9V to +2.5V. These devices are guaranteed to be in the correct state for VCC down to +1.0V.

A variety of preprogrammed reset threshold voltages are available (see the Threshold Suffix Guide). The devices include manual reset and watchdog inputs. The MAX6829/MAX6830/MAX6831 provide a factory-trimmed threshold to monitor a 2nd voltage down to +0.9V. The MAX6826/MAX6829 have a push-pull active-low RESET, the MAX6827/MAX6830 have a push-pull RESET and the MAX6828/MAX6831 have an open-drain active-low RESET. The MAX6826/MAX6827/MAX6828 have an auxiliary monitor that allows user adjustable input to monitor voltages down to +0.6V. See Selector Guide for functions available.

简化框图

MAX6826、MAX6827、MAX6828、MAX6829、MAX6830、MAX6831:典型工作电路 MAX6826、MAX6827、MAX6828、MAX6829、MAX6830、MAX6831:典型工作电路 Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心