MAX705：低成本、微处理器监控电路

低成本复位 + 看门狗IC

The MAX705–MAX708/MAX813L microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor power-supply and battery functions in µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX705/MAX706/MAX813L provide four functions: A reset output during power-up, power-down, and brownout conditions. An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6 seconds. A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than +5V. An active-low manual-reset input. The MAX707/MAX708 are the same as the MAX705/MAX706, except an active-high reset is substituted for the watchdog timer. The MAX813L is the same as the MAX705, except RESET is provided instead of active-low RESET. Two supply-voltage monitor levels are available: The MAX705/MAX707/MAX813L generate a reset pulse when the supply voltage drops below 4.65V, while the MAX706/MAX708 generate a reset pulse below 4.40V. All four parts are available in 8-pin DIP, SO and µMAX® packages.

关键特性
  • Supervisory-Function Integration Significantly Improves System Reliability While Reducing Board Space
    • µMAX Package
    • Guaranteed Active Low RESET Valid at VCC = 1V
      • 200ms Reset Pulse Width
      • Debounced TTL/CMOS-Compatible Manual-Reset Input
      • Active-High Reset Output (MAX707/MAX708/MAX813L)
    • Precision-Supply Voltage Monitor
      • 4.65V (MAX705/MAX707/MAX813L)
      • 4.40V (MAX706/MAX708)
    • Voltage Monitor for Power-Fail or Low-Battery Warning
MAX705、MAX706、MAX707、MAX708、MAX813、MAX813L：典型工作电路
MAX705、MAX706、MAX707、MAX708、MAX813、MAX813L：典型工作电路
应用
  • 计算机
  • 控制器
  • 精确的µP电源监控
  • 智能仪表
数据手册DataSheet
语言下载文件备注
英文MAX705-MAX813L.pdfRev 10; 04/2015
关键参数
Part NumberReset Thresh.
(V)		Reset OuttRESETWatchdog FeatureWatchdog TimeoutSupervisor FeaturesReset Thresh. Accur.
(%)		ICC
(µA)		Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX7053.3 to 5.5
  • Active Low
  • Push-Pull
85ms to 300ms
  • Input (WDI)
  • Input/Output (WDI/WDO)
1s to 2s
  • Adjustable Reset Input
  • Manual Reset
  • Power Fail Comparator/Low Battery Detect
2.5350
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$2.78 @1k
MAX706
  • Active Low
  • Push-Pull
  • Input (WDI)
  • Input/Output (WDI/WDO)
1s to 2s
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$1.82 @1k
MAX707
  • Active High
  • Active Low
  • Push-Pull
No Watchdog-
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$2.01 @1k
MAX708
  • Active High
  • Active Low
  • Push-Pull
No Watchdog-
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$1.82 @1k
质量和环境数据
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订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX705C/D生产中DICE SALES,；NA引脚；DICE S；0°C至+70°C参考数据资料
MAX705CPA停止供货MAX705CPA+PDIP(N),；8引脚；79.7mm²0°C至+70°CRoHS/无铅：否
MAX705CPA+生产中PDIP(N),；8引脚；79.7mm²0°C至+70°CRoHS/无铅：无铅
MAX705CSA停止供货MAX705CSA+SOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：否
MAX705CSA+生产中SOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：无铅
MAX705CSA+T生产中SOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：无铅
MAX705CSA-G05生产中N.SO；0°C至+70°C参考数据资料
MAX705CSA-G077生产中N.SO；0°C至+70°C参考数据资料
MAX705CSA-T停止供货MAX705CSA+TSOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：否
MAX705CSA-TG05停止供货SOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：否
型号状况推荐替代产品封装：类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅？
MAX705CSA-TG077停止供货SOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：否
MAX705CUA停止供货MAX705CUA+µMAX,；8引脚；15.6mm²0°C至+70°CRoHS/无铅：否
MAX705CUA+生产中µMAX,；8引脚；15.6mm²0°C至+70°CRoHS/无铅：无铅
MAX705CUA+T生产中µMAX,；8引脚；15.6mm²0°C至+70°CRoHS/无铅：无铅
MAX705CUA-G05生产中uMAX；0°C至+70°C参考数据资料
MAX705CUA-T停止供货MAX705CUA+TµMAX,；8引脚；15.6mm²0°C至+70°CRoHS/无铅：否
MAX705CUA-TG05停止供货µMAX,；8引脚；15.6mm²0°C至+70°CRoHS/无铅：否
MAX705EPA停止供货MAX705EPA+PDIP(N),；8引脚；79.7mm²-40°C至+85°CRoHS/无铅：否
MAX705EPA+生产中PDIP(N),；8引脚；79.7mm²-40°C至+85°CRoHS/无铅：无铅
MAX705ESA停止供货MAX705ESA+SOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：否
型号状况推荐替代产品封装：类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅？
MAX705ESA+生产中SOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：无铅
MAX705ESA+T生产中SOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：无铅
MAX705ESA-T停止供货MAX705ESA+TSOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：否
MAX705ESA/GH9停止供货MAX705ESA+SOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：否
MAX705ESA/GH9-T停止供货MAX705ESA+SOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：否
MAX705EUA停止供货MAX705EUA+µMAX,；8引脚；15.6mm²-40°C至+85°CRoHS/无铅：否
MAX705EUA+生产中µMAX,；8引脚；15.6mm²-40°C至+85°CRoHS/无铅：无铅
MAX705EUA+T生产中µMAX,；8引脚；15.6mm²-40°C至+85°CRoHS/无铅：无铅
MAX705EUA-T停止供货MAX705EUA+TµMAX,；8引脚；15.6mm²-40°C至+85°CRoHS/无铅：否
MAX705MJA生产中CDIP(N),；8引脚；82.6mm²-55°C至+125°CRoHS/无铅：否
型号状况推荐替代产品封装：类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅？
MAX705MJA/883B生产中CDIP(N),；8引脚；82.6mm²-55°C至+125°CRoHS/无铅：否
MAX705-MAX813L.pdf MAX708
MAX705.pdf MAX705
MAX705-MAX813L.pdf MAX813L
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