MAX707：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
MAX707C/D停止供货DICE SALES,；NA引脚；DICE；0°C至+70°C参考数据资料
MAX707CPA停止供货MAX707CPA+PDIP(N),；8引脚；79.7mm²0°C至+70°CRoHS/无铅：否
MAX707CPA+生产中PDIP(N),；8引脚；79.7mm²0°C至+70°CRoHS/无铅：无铅
MAX707CSA停止供货MAX707CSA+SOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：否
MAX707CSA+生产中SOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：无铅
MAX707CSA+T生产中SOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：无铅
MAX707CSA-T停止供货MAX707CSA+TSOIC(N),；8引脚；30.9mm²0°C至+70°CRoHS/无铅：否
MAX707CUA停止供货MAX707CUA+µMAX,；8引脚；15.6mm²0°C至+70°CRoHS/无铅：否
MAX707CUA+生产中µMAX,；8引脚；15.6mm²0°C至+70°CRoHS/无铅：无铅
MAX707CUA+T生产中µMAX,；8引脚；15.6mm²0°C至+70°CRoHS/无铅：无铅
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？
MAX707CUA-T停止供货MAX707CUA+TµMAX,；8引脚；15.6mm²0°C至+70°CRoHS/无铅：否
MAX707EPA停止供货MAX707EPA+PDIP(N),；8引脚；79.7mm²-40°C至+85°CRoHS/无铅：否
MAX707EPA+生产中PDIP(N),；8引脚；79.7mm²-40°C至+85°CRoHS/无铅：无铅
MAX707ESA停止供货MAX707ESA+SOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：否
MAX707ESA+生产中SOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：无铅
MAX707ESA+T生产中SOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：无铅
MAX707ESA-T停止供货MAX707ESA+TSOIC(N),；8引脚；30.9mm²-40°C至+85°CRoHS/无铅：否
MAX707EUA停止供货MAX707EUA+µMAX,；8引脚；15.6mm²-40°C至+85°CRoHS/无铅：否
MAX707EUA+生产中µMAX,；8引脚；15.6mm²-40°C至+85°CRoHS/无铅：无铅
MAX707EUA+T生产中µMAX,；8引脚；15.6mm²-40°C至+85°CRoHS/无铅：无铅
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？
MAX707EUA-T停止供货MAX707EUA+TµMAX,；8引脚；15.6mm²-40°C至+85°CRoHS/无铅：否
MAX707MJA生产中CDIP(N),；8引脚；82.6mm²-55°C至+125°CRoHS/无铅：否
MAX707MJA/883B生产中CDIP(N),；8引脚；82.6mm²-55°C至+125°CRoHS/无铅：否
MAX707MSA/PR+生产中SOIC(N),；8引脚；30.9mm²-55°C至+125°CRoHS/无铅：无铅
MAX705-MAX813L.pdf MAX708
MAX707.pdf MAX707
MAX705-MAX813L.pdf MAX813L
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