STM6821

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5-pin supervisor with watchdog timer and push-button reset

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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

EDA Symbols, Footprints and 3D Models

STMicroelectronics - STM6821

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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

STM6821LWY6F

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6821MWY6F

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6821RWY6F

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6821SWY6F

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6821TWY6F

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

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

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ECCN (US)
ECCN (EU)
Operating temperature (°C)
RST Threshold (V) (typ)
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STM6821TWY6F
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STM6821SWY6F
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STM6821LWY6F
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STM6821RWY6F
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STM6821MWY6F
Available at distributors

Distributor availability of STM6821MWY6F

Distributor Name
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Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

STM6821TWY6F Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

STM6821TWY6F

Operating Temperature (°C)

Min:

Max:

RST Threshold (V) (typ):

3.08

Distributor Name

Distributor reported inventory date:

STM6821SWY6F Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

STM6821SWY6F

Operating Temperature (°C)

Min:

Max:

RST Threshold (V) (typ):

2.93

Distributor Name

Distributor reported inventory date:

STM6821LWY6F Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

STM6821LWY6F

Operating Temperature (°C)

Min:

Max:

RST Threshold (V) (typ):

4.63

STM6821RWY6F Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

STM6821RWY6F

Operating Temperature (°C)

Min:

Max:

RST Threshold (V) (typ):

2.63

Distributor Name

Distributor reported inventory date:

STM6821MWY6F Active

Budgetary Price (US$)*/Qty:
-
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

Part Number:

STM6821MWY6F

Operating Temperature (°C)

Min:

Max:

RST Threshold (V) (typ):

4.39

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(*) 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