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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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

STM6821LWY6F

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6821MWY6F

Package:

SOT23-5L

Material Declaration**:

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

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) RST Threshold (V) (typ)
Budgetary Price (US$)*/Qty
More info
min
max
STM6821TWY6F Available at 1 distributors

Distributor availability ofSTM6821TWY6F

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 685 1 Buy from Distributor

Distributor reported inventory date: 2022-05-06

Distributor Name

MOUSER

Stock

685

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-06

Active
EAR99 NEC Tape And Reel SOT23-5L -40 85 3.08
MORE INFO

Unit Price (US$):

0.7107

Country of Origin:

CHINA

STM6821SWY6F Available at 1 distributors

Distributor availability ofSTM6821SWY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 31 1 Buy from Distributor

Distributor reported inventory date: 2022-05-06

Distributor Name

DIGIKEY

Stock

31

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-06

Active
EAR99 NEC Tape And Reel SOT23-5L -40 85 2.93
MORE INFO

Unit Price (US$):

0.7107

Country of Origin:

CHINA

STM6821LWY6F Available at 1 distributors

Distributor availability ofSTM6821LWY6F

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 2900 1 Buy from Distributor

Distributor reported inventory date: 2022-05-06

Distributor Name

Farnell Element14

Stock

2900

Min.Order

1

Distributor reported inventory date: 2022-05-06

Active
EAR99 NEC Tape And Reel SOT23-5L -40 85 4.63
MORE INFO

Unit Price (US$):

0.7107

Country of Origin:

CHINA

STM6821RWY6F No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel SOT23-5L -40 85 2.63
MORE INFO

Unit Price (US$):

0.7107

Country of Origin:

CHINA

STM6821MWY6F No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel SOT23-5L -40 85 4.39
MORE INFO

Unit Price (US$):

0.7107

Country of Origin:

CHINA

STM6821TWY6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofSTM6821TWY6F

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 685 1 Buy from Distributor

Distributor reported inventory date: 2022-05-06

Distributor Name

MOUSER

Stock

685

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-06

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

85

RST Threshold (V) (typ)

3.08

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

STM6821SWY6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofSTM6821SWY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 31 1 Buy from Distributor

Distributor reported inventory date: 2022-05-06

Distributor Name

DIGIKEY

Stock

31

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-05-06

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

85

RST Threshold (V) (typ)

2.93

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

STM6821LWY6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofSTM6821LWY6F

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 2900 1 Buy from Distributor

Distributor reported inventory date: 2022-05-06

Distributor Name

Farnell Element14

Stock

2900

Min.Order

1

Distributor reported inventory date: 2022-05-06

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

85

RST Threshold (V) (typ)

4.63

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

STM6821RWY6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

85

RST Threshold (V) (typ)

2.63

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

STM6821MWY6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

85

RST Threshold (V) (typ)

4.39

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

(*) 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