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.
-
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
All resources
Resource title | Version | Latest update |
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Product Specifications (1)
Resource title | Version | Latest update | ||
---|---|---|---|---|
14.0 | 26 Jan 2023 | 26 Jan 2023 |
Application Notes (2)
Resource title | Version | Latest update | ||
---|---|---|---|---|
2.0 | 10 Oct 2022 | 10 Oct 2022 | ||
2.0 | 10 Oct 2022 | 10 Oct 2022 |
Technical Notes & Articles (1)
Resource title | Version | Latest update | ||
---|---|---|---|---|
1.0 | 10 Oct 2022 | 10 Oct 2022 |
Flyers (1)
Resource title | Version | Latest update | ||
---|---|---|---|---|
1.0 | 01 Aug 2015 | 01 Aug 2015 |
EDA Symbols, Footprints and 3D Models
STMicroelectronics - STM6821
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Please select one model supplier :
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Symbols
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Footprints
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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 | |
Marketing Status
Package
SOT23-5L
Grade
Industrial
RoHS Compliance Grade
Ecopack3
Marketing Status
Package
SOT23-5L
Grade
Industrial
RoHS Compliance Grade
Ecopack3
Marketing Status
Package
SOT23-5L
Grade
Industrial
RoHS Compliance Grade
Ecopack3
Marketing Status
Package
SOT23-5L
Grade
Industrial
RoHS Compliance Grade
Ecopack3
Marketing Status
Package
SOT23-5L
Grade
Industrial
RoHS Compliance Grade
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 | Active | 0.4099 / 1k | Available at 1 distributors Distributor availability of STM6821TWY6F
Distributor reported inventory date: 2/27/2025 | | | | Buy from Distributor | | SOT23-5L | Tape and Reel | CHINA | EAR99 | NEC | -40 | 85 | 3.08 | ||||||||||||||||||
STM6821SWY6F | Active | 0.4099 / 1k | Available at 2 distributors Distributor availability of STM6821SWY6F
Distributor reported inventory date: 2/27/2025 | | | | Buy from Distributor | | SOT23-5L | Tape and Reel | CHINA | EAR99 | NEC | -40 | 85 | 2.93 | ||||||||||||||||||
STM6821LWY6F | Active | 0.4099 / 1k | Available at distributors Distributor availability of STM6821LWY6F
Distributor reported inventory date: | | | | Buy from Distributor | | SOT23-5L | Tape and Reel | CHINA | EAR99 | NEC | -40 | 85 | 4.63 | ||||||||||||||||||
STM6821RWY6F | Active | 0.4099 / 1k | Available at 2 distributors Distributor availability of STM6821RWY6F
Distributor reported inventory date: 2/27/2025 | | | | Buy from Distributor | | SOT23-5L | Tape and Reel | CHINA | EAR99 | NEC | -40 | 85 | 2.63 | ||||||||||||||||||
STM6821MWY6F | Active | 0.4099 / 1k | Available at distributors Distributor availability of STM6821MWY6F
Distributor reported inventory date: | | | | Buy from Distributor | | SOT23-5L | Tape and Reel | CHINA | EAR99 | NEC | -40 | 85 | 4.39 |
STM6821TWY6F Active
Part Number:
STM6821TWY6F
Operating Temperature (°C)
Min:
-40
Max:
85
RST Threshold (V) (typ):
3.08
MOUSER
Stock
2254Min.Order
1Distributor reported inventory date: 2/27/2025
Stock
Min.Order
STM6821SWY6F Active
Part Number:
STM6821SWY6F
Operating Temperature (°C)
Min:
-40
Max:
85
RST Threshold (V) (typ):
2.93
MOUSER
Stock
2799Min.Order
1DIGIKEY
Stock
1015Min.Order
1Distributor reported inventory date: 2/27/2025
Stock
Min.Order
STM6821LWY6F Active
Part Number:
STM6821LWY6F
Operating Temperature (°C)
Min:
-40
Max:
85
RST Threshold (V) (typ):
4.63
Distributor reported inventory date:
Stock
Min.Order
STM6821RWY6F Active
Part Number:
STM6821RWY6F
Operating Temperature (°C)
Min:
-40
Max:
85
RST Threshold (V) (typ):
2.63
MOUSER
Stock
1946Min.Order
1DIGIKEY
Stock
2319Min.Order
1Distributor reported inventory date: 2/27/2025
Stock
Min.Order
STM6821MWY6F Active
Part Number:
STM6821MWY6F
Operating Temperature (°C)
Min:
-40
Max:
85
RST Threshold (V) (typ):
4.39
Distributor reported inventory date:
Stock
Min.Order
(*) 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