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四电压µP监控电路,SOT封装

业内尺寸最小的四电压复位IC

产品详情

主要特征

应用/用途

Parametric specs for Supervisors (4 Monitored Voltages)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Out Active Low
Open Drain
Interface Factory Fixed
R/C Adjustable
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
Negative Voltage
ICC (µA) (max) 40
Package/Pins SOT23/6
Budgetary
Price (See Notes)
2.24
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参量

Parametric specs for Supervisors (4 Monitored Voltages)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Out Active Low
Open Drain
Interface Factory Fixed
R/C Adjustable
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
Negative Voltage
ICC (µA) (max) 40
Package/Pins SOT23/6
Budgetary
Price (See Notes)
2.24

主要特征

  • Monitors Four Power-Supply Voltages
  • Precision Factory-Set Reset Threshold Options for +5.0V, +3.3V, +3.0, +2.5V, +1.8V, and -5.0V Supplies
  • User-Adjustable Voltage Monitoring Threshold Options
  • Low 55µA Supply Current
  • Open-Drain active-low RESET Output with 10µA Internal Pullup
  • 140ms (min) Reset Timeout Period
  • Active-low RESET Valid to IN1 = 1V or IN2 = 1V
  • Immune to Short Monitored Supply Transients
  • No External Components Required
  • Guaranteed from -40°C to +85°C
  • Small 6-Pin SOT23 Package

应用/用途

  • 计算机:台式机、工作站和服务器
  • 数据存储设备
  • 高端打印机
  • 工业设备
  • 网络设备
  • 机顶盒
  • 电信

描述

The MAX6339 is a precision quad voltage monitor with microprocessor (µP) supervisory reset timing. The device can monitor up to four system supply voltages without any external components and asserts a single reset if any supply voltage drops below its preset threshold. The device significantly reduces system size and component count while improving reliability compared to separate ICs or discrete components.

A variety of factory-trimmed threshold voltages are available to accommodate different supply voltages and tolerances with minimal external component requirements. The selection includes internally fixed options for monitoring +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V supplies with -5% and/or -10% tolerances. The device is also available with one or two user-adjustable threshold options if non-standard thresholds are desired (use external resistor-divider network).

The quad monitor provides a single active-low reset output that is asserted when any monitored input is below its associated threshold. The output is open drain with a weak internal pullup (10µA) to IN2. Reset remains low for a reset timeout period (140ms min) after all voltages are above the selected thresholds. The output is valid as long as either the IN1 or IN2 input voltage remains > 1V.

The MAX6339 is available in a small 6-pin SOT23 package and operates over the extended (-40°C to +85°C) temperature range.

简化框图

MAX6339:典型工作电路 MAX6339:典型工作电路 Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

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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