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STWD100

Watchdog
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The STWD100 watchdog timer circuits are self-contained devices which prevent system failures that are caused by certain types of hardware errors (non-responding peripherals, bus contention, etc.) or software errors (bad code jump, code stuck in loop, etc.).

The STWD100 watchdog timer has an input, WDI, and an output, WDO. The input is used to clear the internal watchdog timer periodically within the specified timeout period, twd. While the system is operating correctly, it periodically toggles the watchdog input, WDI. If the system fails, the watchdog timer is not reset, a system alert is generated and the watchdog output, WDO, is asserted.

The STWD100 circuit also has an enable pin, EN, which can enable or disable the watchdog functionality. The ENpin is connected to the internal pull-down resistor. The device is enabled if the ENpin is left floating.

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Errata Sheet
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Key Features

  • Current consumption 13 μA typ.
  • Available watchdog timeout periods are 3.4 ms, 6.3 ms, 102 ms and 1.6 s
  • Chip enable input
  • Open drain or push-pull WDOoutput
  • Operating temperature range: –40 to +125 °C
  • Package SOT23-5, SC70-5 (SOT323-5)
  • ESD performance
  • HBM: 2000 V
  • RCDM: 1000 V

回路図

デザイン・リソース

トップ

Technical Documentation

Product Specifications

Description Version Size
pdf
DS5579: Watchdog timer circuit
8.0 410 KB

Application Notes

Description Version Size
pdf
AN2841: LED dimming implemented on STM32™ microcontroller
1.3 782 KB

Technical Notes & Articles

Description Version Size
pdf
TN0941: Reset and supervisor ICs: frequently asked questions (FAQ)
1.0 329 KB

User Manual

Description Version Size
pdf
UM0574: STEVAL-ILL015V1 - LED dimmer demonstration board based on the STP24DP05 and STM32™
1.4 662 KB

Publications and Collaterals

Flyer

Description Version Size
pdf
Resets and supervisors - portfolio overview
1,345 KB
pdf
STWD100 システムの信頼性を向上するイネーブル端子付きスタンドアロン・ウォッチドッグ・タイマ
1.0 152 KB

サンプル& 購入

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製品型名 Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STWD100NPWY3FActiveSOT23-5LTape And Reel-40125_Free Samples.52Distributor reported inventory date: 2014-10-21
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA58943000
P&SOrder NowASIA/PACIFIC12841
DIGIKEYOrder NowWORLDWIDE45381
MOUSEROrder NowWORLDWIDE29651
Ecopack2PDF
XML
STWD100NWWY3FActiveSOT23-5LTape And Reel-40125_-.517Distributor reported inventory date: 2014-10-21
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA30003000
DIGIKEYOrder NowWORLDWIDE30003000
MOUSEROrder NowWORLDWIDE28501
Ecopack2PDF
XML
STWD100NYWY3FActiveSOT23-5LTape And Reel-40125_-.52Distributor reported inventory date: 2014-10-21
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA74763000
AVNETOrder NowAMERICA32880
P&SOrder NowASIA/PACIFIC40881
ANGLIA LiveOrder NowEUROPE330003000
ARROWOrder NowEUROPE721000
DIGIKEYOrder NowWORLDWIDE101791
FUTUREOrder NowWORLDWIDE150003000
MOUSEROrder NowWORLDWIDE95851
Ecopack2PDF
XML
STWD100PYW83FActiveSOT323-5LTape And Reel-40125_-.52Distributor reported inventory date: 2014-10-21
Distributor NameRegionStockMin. order
DIGIKEYOrder NowWORLDWIDE4001
FUTUREOrder NowWORLDWIDE30003000
MOUSEROrder NowWORLDWIDE68571
Ecopack2PDF
XML
STWD100YNPWY3FActiveSOT23-5LTape And Reel-40125Yes-.62Distributor reported inventory date: 2014-10-21
Distributor NameRegionStockMin. order
DIGIKEYOrder NowWORLDWIDE29511
MOUSEROrder NowWORLDWIDE33781
Ecopack2PDF
XML
STWD100YNWWY3FActiveSOT23-5LTape And Reel-40125Yes-.621No availability reported, please contact our Sales officeEcopack2PDF
XML
STWD100YNYWY3FActiveSOT23-5LTape And Reel-40125Yes-.62Distributor reported inventory date: 2014-10-21
Distributor NameRegionStockMin. order
DIGIKEYOrder NowWORLDWIDE25121
MOUSEROrder NowWORLDWIDE28671
Ecopack2PDF
XML

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