MAX811

4引脚微处理器电压监测器,带有手动复位输入

4引脚SOT复位IC,带有手动复位


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说明

The MAX811/MAX812 are low-power microprocessor (µP) supervisory circuits used to monitor power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V-powered or 3V-powered circuits. The MAX811/MAX812 also provide a debounced manual reset input.

These devices perform a single function: They assert a reset signal whenever the VCC supply voltage falls below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. The only difference between the two devices is that the MAX811 has an active-low RESET output (which is guaranteed to be in the correct state for VCC down to 1V), while the MAX812 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC. Reset thresholds are available for operation with a variety of supply voltages.

Low supply current makes the MAX811/MAX812 ideal for use in portable equipment. The devices come in a 4-pin SOT143 package.
MAX811、MAX811L、MAX811M、MAX811R、MAX811S、MAX811T、MAX812、MAX812L、MAX812M、MAX812R、MAX812S、MAX812T:典型工作电路 MAX811、MAX811L、MAX811M、MAX811R、MAX811S、MAX811T、MAX812、MAX812L、MAX812M、MAX812R、MAX812S、MAX812T:典型工作电路 放大+

关键特性

  • Integrated Voltage Monitor Increases System Robustness with Added Manual Reset
    • Precision Monitoring of 3V, 3.3V, and 5V Power-Supply Voltages
    • 140ms Min Power-On-Reset Pulse Width
      • - Active-Low RESET Output (MAX811), RESET Output (MAX812)
    • Guaranteed Over Temperature
    • Guaranteed Active-Low RESET Valid to VCC = 1V (MAX811)
    • Power-Supply Transient Immunity
  • Saves Board Space
    • No External Components
    • 4-Pin SOT143 Package
  • Low Power Consumption Simplifies Power-Supply Requirements
    • 6µA Supply Current

应用

  • 计算机:台式机、工作站和服务器
  • 控制器
  • 精确的µP与µC电源监控
  • 智能仪表
  • 便携式电池供电设备

请查看具体的参数规格 Supervisors (1 Monitored Voltage) (252)


Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX811 
2.5 to 3.3
3.3 to 5.5
Active Low
Push-Pull
85ms to 300msNo WatchdogManual Reset1.515
SOT23/4
$1.60 @1k
MAX812 
Active High
Push-Pull
SOT23/4
$1.51 @1k

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

工具和模型

  • MAX811S IBIS模型
  • 产品可靠性报告: MAX811.pdf 
    型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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