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电源监测器

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 Low
Open Drain
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Supervisor Features Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 2000
Package/Pins PDIP/8
SOIC (W)/16
Budgetary
Price (See Notes)
4.06
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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 Low
Open Drain
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Supervisor Features Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 2000
Package/Pins PDIP/8
SOIC (W)/16
Budgetary
Price (See Notes)
4.06

主要特征

  • Monitors input and power supply and warns of impending failure
  • Provides orderly shutdown
  • Initiates and holds processor reset until levels are unsafe
  • Tolerance threshold levels can be set for 5% or 10%
  • Automatically restarts processor on power-up
  • Pauses restart until system stabilizes
  • Operating range: 0°C to +70°C (DS1231 and DS1231S)
    -40°C to +85°C (DS1231-N and DS1231S-N)
  • Optional active-low NMI Hysteresis (200mV = "-20", 350mV = "-35", 500mV = "-50")

应用/用途

描述

With precise, temperature-compensated comparators, the DS1231 Power Monitor Chip monitors input power and a 5V system power supply. If unsafe voltages are detected, a nonmaskable interrupt sends a warning signal to the processor in advance of power failure. Processing is unconditionally halted when power falls below a user-selectable 5% or 10% threshold level, with time to shutdown proportional to the available hold-up time of the power supply. Upon return of power, the DS1231 maintains reset until power conditions stabilize.

The DS1231 enhances system reliability by closely monitoring both processor and upstream power levels, warning of impending failure, and automatically suspending and restarting processor operation. An input sense also supports a connection to switched inputs such as an opto-isolator for LED function. All external reset components (i.e., pull-up resistor and delay timing capacitor) are contained in one package, saving space and cost.

简化框图

DS1231:原理框图 DS1231:原理框图 Zoom icon

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