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低成本、上电复位与看门狗控制器

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
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
ICC (µA) (max) 5000
Package/Pins PDIP/8
SOIC (W)/16
Budgetary
Price (See Notes)
2.6
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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
Push-Pull
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
ICC (µA) (max) 5000
Package/Pins PDIP/8
SOIC (W)/16
Budgetary
Price (See Notes)
2.6

主要特征

  • Precision Voltage Monitor
  • Power-OK/Reset Time Delay
  • Watchdog Timer
  • Minimum Component Count

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 MAX698/MAX699 monitor the +5V supply in microprocessor (µP) and digital systems. They supply a active-low RESET pulse of at least 140ms duration on power-up, power-down, and during low-voltage brownout conditions. Circuit reliability is increased at reduced cost by eliminating all external components and adjustments.

The MAX699 includes all features of the MAX698, but also provides a watchdog input to monitor microprocessor activity. The active-low RESET output goes low if the watchdog input (WDI) is not toggled within 1 second. The watchdog feature can be disabled by leaving WDI open.

Both parts are supplied in 8-lead PDIP and 16-lead 0.3in wide small outline (SO) packages and are specified from 0°C to +70°C for C grade devices and -40°C to +85°C for E devices. The SO versions, with more pins than the 8-lead PDIP, have additional outputs not available in DIP packages. These are RESET (without inversion) and watchdog output (active-low WDO).

简化框图

MAX698、MAX699:典型工作电路 MAX698、MAX699:典型工作电路 Zoom icon

Technical Docs

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