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Maxim产品 - MAX697介绍

MAX697 - 微处理器监控电路

MAX697是Maxim美信半导体公司的一款监控电路、电压监测、排序产品，MAX697是微处理器监控电路，本站介绍了MAX697的封装应用图解、特点和优点、功能等，并给出了与MAX697相关的Maxim元器件型号供参考。

MAX697 - 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 MAX696/MAX697 supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (µP) systems. These include µP reset and backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. The MAX696/MAX697 significantly improve system reliability and accuracy compared to that obtained with separate ICs or discrete components.

The MAX696 and MAX697 are supplied in 16-pin packages and perform six functions:

  1. A reset output during power-up, power-down, and brownout conditions. The threshold for this "lowline" reset is adjustable by an external voltage-divider.
  2. A reset pulse if the optional watchdog timer has not been toggled within a specified time.
  3. Individual outputs for low-line and watchdog fault conditions.
  4. The reset time may be left at its default value of 50ms, or may be varied with an external capacitor or clock pulses.
  5. A separate 1.3V threshold detector for power-fail warning, low-battery detection, or to monitor a power supply other than VCC.
The MAX696 also has battery-backup switching for CMOS RAM, CMOS microprocessor, or other low-power logic.

The MAX697 lacks battery-backup switching, but has write-protection pins (active-low CE IN and active-low CE OUT) for CMOS RAM or EPROM. In addition, it consumes less than 250 microamperes.

关键特性
  • 以下关键特性由Maxim美信半导体提供：
  • Adjustable Low-Line Monitor and Power-Down Reset
  • Power-OK/Reset Time Delay
  • Watchdog Timer—100ms, 1.6s, or Adjustable
  • Minimum Component Count
  • 1µA Standby Current
  • Battery-Backup Power Switching (MAX696)
  • On-Board Gating of Chip-Enable Signals (MAX697)
  • Separate Monitor for Power-Fail or Low-Battery Warning
    • 热门应用
  • 计算机
  • 控制器
  • 精确的µP电源监控
  • 智能仪表
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