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低电压、SOT23封装、微处理器监控电路,带有电源失效检测输入/输出、手动复位及看门狗定时器

产品详情

主要特征

Parametric specs for Supervisors (1 Monitored Voltage)
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 Out Active Low
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature Input (WDI)
Input/Output (WDI/WDO)
Watchdog Timeout 1s to 2s
Supervisor Features Adjustable Reset Input
Manual Reset
Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 25
Package/Pins SOT23/8
Budgetary
Price (See Notes)
1.64
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参量

Parametric specs for Supervisors (1 Monitored Voltage)
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 Out Active Low
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature Input (WDI)
Input/Output (WDI/WDO)
Watchdog Timeout 1s to 2s
Supervisor Features Adjustable Reset Input
Manual Reset
Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 25
Package/Pins SOT23/8
Budgetary
Price (See Notes)
1.64

主要特征

  • Small 8-Pin SOT23 Package
  • Precision Monitoring of +5.0V, +3.3V, +3.0V, +2.5V Supply Voltages
  • 140ms Reset Timeout Delay
  • Power-Fail Input with Independent Output; Monitor Inputs Down to 0.62V (MAX6704—MAX6708)
  • Dual Adjustable Reset Input for Triple-Voltage Monitoring (MAX6701(A)/MAX6702(A)/MAX6703(A))
  • 1.6s Watchdog Timeout Period (MAX6701(A)—MAX6707(A))
  • Independent Watchdog Output (MAX6701(A)/MAX6702(A)/MAX6703(A)/MAX6705(A)/MAX6706(A)/MAX6707(A))
  • Manual Reset Input
  • Four Reset Output Stage Options
    • Active Low Push-Pull (MAX6701(A), MAX6705(A))
    • Active Low Open Drain (MAX6703(A), MAX6707(A))
    • Active High Push-Pull (MAX6702(A), MAX6706(A))
    • Dual Active Low/High Push-Pull (MAX6704, MAX6708)
  • Guaranteed Reset Valid to VCC = 1V
  • Immune to Short Falling VCC Transients
  • Low Cost, Few External Components

应用/用途

  • 计算机
  • 控制器
  • 精确的µP电源监控
  • 智能仪表
  • 网络
  • 电信
  • 白色家电

描述

The MAX6701—MAX6708 microprocessor (µP) supervisory circuits reduce the complexity and components required to monitor power-supply functions in µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components.

The MAX6701—MAX6708 family provides 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 1.6s; a 0.62V threshold detector for power-fail warning; and an active-low manual reset input.

The MAX6701—MAX6708 family offers several pinout options to accommodate a variety of multivoltage microprocessor supervision applications.

The MAX6701(A)/MAX6702(A)/MAX6703(A) monitor three supply voltages (one fixed threshold and two adjustable) to drive a single reset output and include a manual reset input and a watchdog timer with an independent output. The MAX6704 monitors a single-supply voltage to drive complementary reset outputs and includes an independent adjustable power-fail-in/power-fail-out comparator, a manual reset input, and a reset-based watchdog timer. The MAX6705(A)/MAX6706(A)/MAX6707(A) monitor a single-supply voltage to drive a single reset output and include an independent adjustable power-fail-in/power-fail-out comparator, a manual reset input, and a watchdog timer with an independent output. The MAX6708 is the same as the MAX6704 but without the watchdog timer function.

See the Detailed Description for differences between non-A and A versions.

简化框图

MAX6701、MAX6701A、MAX6702、MAX6702A、MAX6703、MAX6703A:引脚配置 MAX6701、MAX6701A、MAX6702、MAX6702A、MAX6703、MAX6703A:引脚配置 Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

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