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Maxim产品 - MAX694介绍

MAX694 - 微处理器监控电路

MAX694是Maxim美信半导体公司的一款监控电路、电压监测、排序产品，MAX694是微处理器监控电路，本站介绍了MAX694的封装应用图解、特点和优点、功能等，并给出了与MAX694相关的Maxim元器件型号供参考。

MAX694 - 微处理器监控电路 - 监控电路、电压监测、排序 - 工业标准、功能完备的µP监控电路 - 美信半导体

产品概述

The MAX690 family of supervisory circuits reduces the complexity and number of components required for power supply monitoring and battery control functions in microprocessor systems. These include µP reset and backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. The MAX690 family significantly improves system reliability and accu- racy compared to that obtainable with separate ICs or discrete components.

The MAX690, MAX692, and MAX694 are supplied in 8-pin packages and provide four functions:

  • A reset output during power-up, power-down, and brownout conditions.
  • Battery backup switching for CMOS RAM, CMOS microprocessor or other low power logic.
  • A Reset pulse if the optional watchdog timer has not been toggled within a specified time.
  • A 1.3V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5V.

The MAX691, MAX693, and MAX695 are supplied in 16-pin packages and perform all MAX690, MAX692, MAX694 functions, plus:

  • Write protection of CMOS RAM or EEPROM.
  • Adjustable reset and watchdog timeout periods.
  • Separate outputs for indicating a watchdog timeout, backup-battery switchover, and low VCC.

关键特性
  • 以下关键特性由Maxim美信半导体提供：
  • Supervisory Function Integration Saves Board Space while Fully Protecting Microprocessor-Based Systems
  • Precision Voltage Monitor
  • 4.65V (MAX690, MAX691, MAX694, MAX695)
  • 4.40V (MAX692, MAX693)
  • Power OK/Reset Time Delay
  • 50ms, 200ms, or Adjustable
  • Watchdog Timer
  • 100ms, 1.6s, or Adjustable
  • Battery Backup Power Switching
  • Voltage Monitor for Power Fail or Low Battery Warning
  • Minimum External Component Count
  • Low Power Consumption in Battery Backup Mode Extends Battery Life
  • 1µA Standby Current
  • Onboard Gating of Chip Enable Signals Protects Against Erroneous Data Written to RAM During Low VCC Events
    • 热门应用
  • 汽车系统
  • 计算机
  • 控制器
  • 精确的µP电源监控
  • 智能仪表
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