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微处理器监测器

升级后的MAX1232使功耗降低10倍

产品详情

主要特征

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active High
Active Low
Open Drain
tRESET (min) 85ms to 300ms
Watchdog Feature Input (WDI)
Watchdog Timeout 1s to 2s
<1s
Adjustable
Supervisor Features Manual Reset
ICC (µA) (max) 200
Package/Pins CDIP/8
PDIP/8
SOIC (N)/8
SOIC (W)/16
Budgetary
Price (See Notes)
1.97
缩小

简化框图

Technical Docs

数据资料 微处理器监测器 Dec 01, 2014

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参量

Parametric specs for Supervisors (1 Monitored Voltage)
Reset Thresh. (V) 3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active High
Active Low
Open Drain
tRESET (min) 85ms to 300ms
Watchdog Feature Input (WDI)
Watchdog Timeout 1s to 2s
<1s
Adjustable
Supervisor Features Manual Reset
ICC (µA) (max) 200
Package/Pins CDIP/8
PDIP/8
SOIC (N)/8
SOIC (W)/16
Budgetary
Price (See Notes)
1.97

主要特征

  • Consumes 1/10th the Power of the DS1232
  • Precision Voltage Monitor—Adjustable +4.5V or +4.75V
  • Power-OK/Reset Pulse Width—250ms Min
  • No External Components
  • Adjustable Watchdog Timer—150ms, 600ms, or 1.2s
  • Debounced Manual Reset Input for External Override
  • Available in 8-Pin PDIP/SO and 16-Pin Wide SO Packages

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 MAX1232 microprocessor (µP) supervisory circuit provides µP housekeeping and power-supply supervision functions while consuming only 1/10th the power of the DS1232. The MAX1232 enhances circuit reliability in µP systems by monitoring the power supply, monitoring the software execution, and providing a debounced manual reset input. The MAX1232 is a plug-in upgrade of the Dallas DS1232.

A reset pulse of at least 250ms duration is supplied on power-up, power-down, and low-voltage brownout conditions (5% or 10% supply tolerances can be selected digitally). Also featured is a debounced manual reset input that forces the reset outputs to their active states for a minimum of 250ms. A digitally programmable watchdog timer monitors software execution and can be programmed for timeout settings of 150ms, 600ms, or 1.2s. The MAX1232 requires no external components.

简化框图

MAX1232:典型工作电路 MAX1232:典型工作电路 Zoom icon

Technical Docs

数据资料 微处理器监测器 Dec 01, 2014

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