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  • 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

Circuit Diagram

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Part Number
Package
Packing Type
RST Threshold (V) (typ)
Temperature (°C) Marketing Status
Budgetary Price (US$)*
Quantity
More info
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min
max
STM6321MAWY6F SOT23-5L Tape And Reel 4.39 - -
Active
0.53 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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Distributor availability ofSTM6321MAWY6F

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Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2985 1 Order Now

Distributor reported inventory date: 2019-09-24

Distributor Name

MOUSER

Stock

2985

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1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-24

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STM6321LWY6F SOT23-5L Tape And Reel 4.63 - -
Active
0.53 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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Distributor availability ofSTM6321LWY6F

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Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4560 1 Order Now
MOUSER WORLDWIDE 2995 1 Order Now

Distributor reported inventory date: 2019-09-24

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DIGIKEY

Stock

4560

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1

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2995

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STM6321TWY6F SOT23-5L Tape And Reel 3.08 - -
Active
0.53 1000
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ECCN (US):

EAR99

Country of Origin:

MALAYSIA

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DIGIKEY WORLDWIDE 3100 1 Order Now
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3100

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4340

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2900

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STM6321MWY6F SOT23-5L Tape And Reel 4.39 - -
Active
0.53 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofSTM6321MWY6F

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ARROW EUROPE 3000 0 Order Now

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STM6321SWY6F SOT23-5L Tape And Reel 2.93 - -
Active
0.53 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofSTM6321SWY6F

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Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5616 1 Order Now
RS COMPONENTS EUROPE 2990 1 Order Now
AVNET AMERICA 3000 0 Order Now
ARROW AMERICA 6000 3000 Order Now
MOUSER WORLDWIDE 3514 1 Order Now
Farnell Element14 EUROPE 2332 1 Order Now

Distributor reported inventory date: 2019-09-24

Distributor Name

DIGIKEY

Stock

5616

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2990

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

3514

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2332

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-24

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STM6321RWY6F SOT23-5L Tape And Reel 2.63 - -
Active
0.53 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofSTM6321RWY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4689 1 Order Now
RS COMPONENTS EUROPE 5135 1 Order Now
Newark Element14 AMERICA 628 0 Order Now
MOUSER WORLDWIDE 5108 1 Order Now
Farnell Element14 EUROPE 28 1 Order Now

Distributor reported inventory date: 2019-09-24

Distributor Name

DIGIKEY

Stock

4689

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5135

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

628

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

5108

Min.Order

1

Region

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Farnell Element14

Stock

28

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1

Region

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Distributor reported inventory date: 2019-09-24

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STM6321MAWY6F

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.53*

Distributor availability ofSTM6321MAWY6F

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 2985 1 Order Now

Distributor reported inventory date: 2019-09-24

Distributor Name

MOUSER

Stock

2985

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-24

RST Threshold (V) (typ)

4.39

Operating Temperature (°C)

(min)

-

(max)

-

Marketing Status

Active

Unit Price (US$)

0.53

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

STM6321LWY6F

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.53*

Distributor availability ofSTM6321LWY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4560 1 Order Now
MOUSER WORLDWIDE 2995 1 Order Now

Distributor reported inventory date: 2019-09-24

Distributor Name

DIGIKEY

Stock

4560

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2995

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-24

RST Threshold (V) (typ)

4.63

Operating Temperature (°C)

(min)

-

(max)

-

Marketing Status

Active

Unit Price (US$)

0.53

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

STM6321TWY6F

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.53*

Distributor availability ofSTM6321TWY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3100 1 Order Now
MOUSER WORLDWIDE 4340 1 Order Now
Farnell Element14 EUROPE 2900 1 Order Now

Distributor reported inventory date: 2019-09-24

Distributor Name

DIGIKEY

Stock

3100

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

4340

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2900

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-24

RST Threshold (V) (typ)

3.08

Operating Temperature (°C)

(min)

-

(max)

-

Marketing Status

Active

Unit Price (US$)

0.53

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

STM6321MWY6F

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.53*

Distributor availability ofSTM6321MWY6F

Distributor Name
Region Stock Min. Order Third party link
ARROW EUROPE 3000 0 Order Now

Distributor reported inventory date: 2019-09-24

Distributor Name

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-24

RST Threshold (V) (typ)

4.39

Operating Temperature (°C)

(min)

-

(max)

-

Marketing Status

Active

Unit Price (US$)

0.53

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

STM6321SWY6F

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.53*

Distributor availability ofSTM6321SWY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5616 1 Order Now
RS COMPONENTS EUROPE 2990 1 Order Now
AVNET AMERICA 3000 0 Order Now
ARROW AMERICA 6000 3000 Order Now
MOUSER WORLDWIDE 3514 1 Order Now
Farnell Element14 EUROPE 2332 1 Order Now

Distributor reported inventory date: 2019-09-24

Distributor Name

DIGIKEY

Stock

5616

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2990

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

3514

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2332

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-24

RST Threshold (V) (typ)

2.93

Operating Temperature (°C)

(min)

-

(max)

-

Marketing Status

Active

Unit Price (US$)

0.53

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

STM6321RWY6F

Package

SOT23-5L

Packing Type

Tape And Reel

Unit Price (US$)

0.53*

Distributor availability ofSTM6321RWY6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4689 1 Order Now
RS COMPONENTS EUROPE 5135 1 Order Now
Newark Element14 AMERICA 628 0 Order Now
MOUSER WORLDWIDE 5108 1 Order Now
Farnell Element14 EUROPE 28 1 Order Now

Distributor reported inventory date: 2019-09-24

Distributor Name

DIGIKEY

Stock

4689

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5135

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

628

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

5108

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

28

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-24

RST Threshold (V) (typ)

2.63

Operating Temperature (°C)

(min)

-

(max)

-

Marketing Status

Active

Unit Price (US$)

0.53

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Technical Documentation

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      DS4189
      5-pin supervisor with watchdog timer and push-button reset
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      662.96 KB
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      5-pin supervisor with watchdog timer and push-button reset

    • Description Version Size Action
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      Microprocessor supervisor functions
      2.0
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      Microprocessor supervisor functions

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      TN0941
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Publications and Collaterals

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      Resets and supervisors - portfolio overview 1.0
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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM6321LWY6F
Active
SOT23-5L Industrial Ecopack3
STM6321MAWY6F
Active
SOT23-5L Industrial Ecopack3
STM6321MWY6F
Active
SOT23-5L Industrial Ecopack3
STM6321RWY6F
Active
SOT23-5L Industrial Ecopack3
STM6321SWY6F
Active
SOT23-5L Industrial Ecopack3
STM6321TWY6F
Active
SOT23-5L Industrial Ecopack3

STM6321LWY6F

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6321MAWY6F

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6321MWY6F

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6321RWY6F

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6321SWY6F

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM6321TWY6F

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.