STM6821:Reset + Watchdog

The STM6xxx supervisors are self-contained devices which provide microprocessor supervisory functions. A precision voltage reference and comparator monitors the VCCinput for an out-of-tolerance condition. When an invalid VCCcondition occurs, the reset output (RST) is forced low (or high in the case of RST). These devices also offer a watchdog timer (except for STM6322/6825) and/or a push-button (MR) reset input.

These devices are available in a standard 5-pin SOT23 package.

Key Features

  • Precision VCC monitoring of 5, 3.3, 3, or 2.5 V power supplies
  • RST outputs (active low, push-pull or open drain)
  • RST outputs (active high, push-pull)
  • Reset pulse width of 1.4 ms, 200 ms and 240 ms (typ.)
  • Watchdog timeout period of 1.6 s (typ.)
  • Manual reset input (MR )
  • Low supply current - 3 μA (typ.)
  • GuaranteedRST (RST) assertion down to VCC = 1.0 V
  • Operating temperature: –40 to +85 °C (industrial grade)
  • RoHS complianceLead-free components are compliant with the RoHS directive
产品规格
DescriptionVersionSize
DS4189: 5-pin supervisor with watchdog timer and push-button reset13.0662 KB
应用手册
DescriptionVersionSize
AN1957: Microprocessor supervisor functions2.0577 KB
AN1336: Power-fail comparator for NVRAM supervisory devices2.0127 KB
Technical Notes & Articles
DescriptionVersionSize
TN0941: Reset and supervisor ICs: frequently asked questions (FAQ)1.0328 KB
宣传册
DescriptionVersionSize
Resets and supervisors - portfolio overview1.01 MB
Watchdog ICs For automotive applications487 KB
样片和购买
型号PackagePacking TypeRST Threshold (V) (typ)Operating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STM6821TWY6FSOT23-5LTape And Reel3.08-40850.491000NECEAR99MALAYSIA
STM6821SWY6FSOT23-5LTape And Reel2.93-40850.491000NECEAR99MALAYSIA
STM6821LWY6FSOT23-5LTape And Reel4.63-40850.491000NECEAR99MALAYSIA
STM6821RWY6FSOT23-5LTape And Reel2.63-40850.491000NECEAR99MALAYSIA
STM6821MWY6FSOT23-5LTape And Reel4.39-40850.491000NECEAR99MALAYSIA
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
STM6821TWY6FSOT23-5LIndustrialEcopack3
STM6821SWY6FSOT23-5LIndustrialEcopack3
STM6821LWY6FSOT23-5LIndustrialEcopack3
STM6821RWY6FSOT23-5LIndustrialEcopack3
STM6821MWY6FSOT23-5LIndustrialEcopack3
5-pin supervisor with watchdog timer and push-button reset STM6321
circuit_diagram_11110_thumbnail.png STM6321
Microprocessor supervisor functions STM805T-S-R
Power-fail comparator for NVRAM supervisory devices M41T60
Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R
Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R
Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R