Product overview
Description
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.
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All 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
Circuit Diagram
EDA Symbols, Footprints and 3D Models
STMicroelectronics - STM6821
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3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| STM6821LWY6F | Active | SOT23-5L | Industrial | Ecopack3 | |
| STM6821MWY6F | Active | SOT23-5L | Industrial | Ecopack3 | |
| STM6821RWY6F | Active | SOT23-5L | Industrial | Ecopack3 | |
| STM6821SWY6F | Active | SOT23-5L | Industrial | Ecopack3 | |
| STM6821TWY6F | Active | SOT23-5L | Industrial | Ecopack3 | |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | RST Threshold (V) (typ) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | ||||||||||||||
| STM6821TWY6F | | | distributors No availability of distributors reported, please contact our sales office |
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| STM6821SWY6F | | | distributors No availability of distributors reported, please contact our sales office |
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| STM6821LWY6F | | | distributors No availability of distributors reported, please contact our sales office |
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| STM6821RWY6F | | | distributors No availability of distributors reported, please contact our sales office |
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| STM6821MWY6F | | | distributors No availability of distributors reported, please contact our sales office |
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STM6821TWY6F Active
STM6821SWY6F Active
STM6821LWY6F Active
STM6821RWY6F Active
STM6821MWY6F Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors