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低成本微处理器监控电路,具有备用电池控制器

电池备份电路,提供手动复位和电源失效比较器

产品详情

主要特征

应用/用途

Parametric specs for Battery Backup Circuits
Reset Thresh. (V) 3.3 to 5.5
Reset Out Active Low
Push-Pull
ICC (µA) (max) 350
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
3.4
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技术文档

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参量

Parametric specs for Battery Backup Circuits
Reset Thresh. (V) 3.3 to 5.5
Reset Out Active Low
Push-Pull
ICC (µA) (max) 350
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
3.4

主要特征

  • Battery-Backup Power Switching
  • Precision Supply-Voltage Monitor
    • 4.65V (MAX703)
    • 4.40V (MAX704)
  • 200ms Reset Pulse Width
  • Debounced TTL/CMOS-Compatible Manual Reset Input
  • 200µA Quiescent Current
  • 50nA Quiescent Current in Battery-Backup Mode
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • 8-Pin DIP and SO Packages
  • Guaranteed RESET-bar Assertion to VCC = 1V

应用/用途

  • 计算机
  • 控制器
  • 精确的µP电源监控
  • 智能仪表

描述

The MAX703/MAX704 microprocessor (µP) supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery control functions in µP systems. These devices significantly improve system reliability and accuracy compared to that obtained with separate ICs or discrete components.

The MAX703/MAX704 are available in 8-pin DIP and SO packages and provide four functions:
  1. An active-low reset during power-up, power-down, and brownout conditions.
  2. Battery-backup switching for CMOS RAM, CMOS µPs, or other low-power logic circuitry.
  3. A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than +5V.
  4. An active-low manual reset input.
The MAX703 and MAX704 differ only in their supply-voltage monitor levels. The MAX703 generates a reset when the supply drops below 4.65V, while the MAX704 generates a reset below 4.40V.

简化框图

MAX703、MAX704:典型工作电路 MAX703、MAX704:典型工作电路 Zoom icon

技术文档

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