MAX6372

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说明

The MAX6369–MAX6374 are pin-selectable watchdog timers that supervise microprocessor (µP) activity and signal when a system is operating improperly. During normal operation, the microprocessor should repeatedly toggle the watchdog input (WDI) before the selected watchdog timeout period elapses to demonstrate that the system is processing code properly. If the µP does not provide a valid watchdog input transition before the timeout period expires, the supervisor asserts a watchdog (active-low WDO) output to signal that the system is not executing the desired instructions within the expected time frame. The watchdog output pulse can be used to reset the µP or interrupt the system to warn of processing errors.

The MAX6369–MAX6374 are flexible watchdog timer supervisors that can increase system reliability through notification of code execution errors. The family offers several pin-selectable watchdog timing options to match a wide range of system timing applications:
  • Watchdog startup delay: provides an initial delay before the watchdog timer is started.
  • Watchdog timeout period: normal operating watchdog timeout period after the initial startup delay.
  • Watchdog output/timing options: open drain (100ms) or push-pull (1ms).
The MAX6369-MAX6374 operate over a +2.5V to +5.5V supply range and are available in miniature 8-pin SOT23 packages.
MAX6369、MAX6370、MAX6371、MAX6372、MAX6373、MAX6374:功能框图 MAX6369、MAX6370、MAX6371、MAX6372、MAX6373、MAX6374:功能框图 放大+

关键特性

  • Precision Watchdog Timer for Critical µP Applications
  • Pin-Selectable Watchdog Timeout Periods
  • Pin-Selectable Watchdog Startup Delay Periods
  • Ability to Change Watchdog Timing Characteristics Without Power Cycling
  • Open-Drain or Push-Pull Pulsed Active-Low Watchdog Output
  • Watchdog Timer Disable Feature
  • +2.5V to +5.5V Operating Voltage
  • 8µA Low Supply Current
  • No External Components Required
  • Miniature 8-Pin SOT23 Package
  • AEC-Q100 Qualified (MAX6369KA/V+ and MAX6374KA/V+ Only)

应用

  • 汽车
  • 精确的µC与微控制器(µC)监控
  • 嵌入式控制系统
  • 工业控制器
  • 网络
  • 电信

请查看具体的参数规格 Watchdog Timers (10)


Part NumberWatchdog FeatureWatchdog TimeoutWatchdog Startup DelayWatchdog OutputICC
(µA)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
minmaxSee Notes
MAX6369 
Input (WDI)
Input/Output (WDI/WDO)
Pin Selectable
Watchdog Only
1s to 2s
<1s
>2s
Adjustable
<60sOpen-Drain20
SOT23/8
-40 to +85
0 to +70
$1.81 @1k
MAX6370 <60sPush-Pull
SOT23/8
MAX6371 60sOpen-Drain
SOT23/8
MAX6372 60sPush-Pull
SOT23/8
MAX6373 >60sOpen-Drain
SOT23/8
MAX6374 >60sPush-Pull
SOT23/8

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

技术资料

应用笔记 1865 Different Ways to Use a MAX6369 Series Watchdog Timer

其它资源

Breakout/Adapter Boards: SOT-23-5

Powering Through Faults on the Smart Grid


产品可靠性报告: MAX6372.pdf 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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