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3.0V/3.3V微处理器监控电路

业内首款电池备份监控电路,用于3.3V/3.0V系统

产品详情

主要特征

应用/用途

Parametric specs for Battery Backup Circuits
Reset Thresh. (V) 2.5 to 3.0
Reset Out Active High
Open Drain
ICC (µA) (max) 50
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins See Data Sheet
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参量

Parametric specs for Battery Backup Circuits
Reset Thresh. (V) 2.5 to 3.0
Reset Out Active High
Open Drain
ICC (µA) (max) 50
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins See Data Sheet

主要特征

  • Active-Low RESET and RESET Outputs
  • Manual Reset Input
  • Precision Supply-Voltage Monitor
  • 200ms Reset Time Delay
  • Watchdog Timer (1.6sec timeout)
  • Battery-Backup Power Switching-Battery Can Exceed VCC in Normal Operation
  • 40µA VCC Supply Current
  • 1µA Battery Supply Current
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Guaranteed Active-Low RESET Assertion to VCC = 1V
  • 8-Pin DIP and SO Packages

应用/用途

  • 电池供电计算机/控制器
  • 精确的µP监控
  • 嵌入式控制器
  • 智能仪表
  • 便携式设备

描述

These microprocessor (µP) supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery-control functions in µP systems. They significantly improve system reliability and accuracy compared to separate ICs or discrete components.

These devices are designed for use in systems powered by 3.0V or 3.3V supplies. See the selector guide in the back of this data sheet for similar devices designed for 5V systems. The suffixes denote different reset threshold voltages: 3.075V (T), 2.925V (S), and 2.625V (R) (see Reset Threshold section in the Detailed Description). All these parts are available in 8-pin DIP and SO packages. Functions offered in this series are as follows:

Part Active-Low Reset Active-High Reset Watchdog Input Manual Reset Input Backup-Battery Switch Power-Fail Threshold Accuracy Power-Fail Comparator Reset Window
MAX690     ±4% ±75mV
MAX704     ±4% ±75mV
MAX802     ±2% ±2%
MAX804     ±2% ±2%
MAX805     ±4% ±75mV
MAX806     ±2% ±2%

简化框图

MAX690R、MAX690S、MAX690T、MAX704R、MAX704S、MAX704T、MAX802、MAX802R、MAX802S、MAX802T、MAX804、MAX804R、MAX804S、MAX804T、MAX805、MAX805R、MAX805S、MAX805T、MAX806R、MAX806S、MAX806T:典型工作电路 MAX690R、MAX690S、MAX690T、MAX704R、MAX704S、MAX704T、MAX802、MAX802R、MAX802S、MAX802T、MAX804、MAX804R、MAX804S、MAX804T、MAX805、MAX805R、MAX805S、MAX805T、MAX806R、MAX806S、MAX806T:典型工作电路 Zoom icon

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