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  • The STM1001 microprocessor reset circuit is a low-power supervisory device used to monitor power supplies. It performs a single function: asserting a reset signal whenever the VCC supply voltage drops below a preset value and keeping it asserted until VCC has risen above the preset threshold for a minimum period of time (trec).

    Key Features

    • Lead-free, small SOT23 package
    • Operating temperature:–40 °C to 85 °C (industrial grade)
    • Precision monitoring of 3 V, 3.3 V, and 5 V supply voltages
    • 30 ms or 140 ms reset pulse width (min)
    • Open drain RST output
    • Guaranteed RST assertion down to VCC= 1.0 V
    • Low supply current - 6 μA (typ)

Circuit Diagram

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Technical Documentation

    • Description Version Size Action
      DS3809
      Reset circuit
      6.1
      283.86 KB
      PDF
      DS3809

      Reset circuit

    • Description Version Size Action
      AN1790
      How to connect ST reset circuits to a microprocessor
      1.4
      84.97 KB
      PDF
      AN1790

      How to connect ST reset circuits to a microprocessor

    • Description Version Size Action
      TN0941
      Reset and supervisor ICs: frequently asked questions (FAQ)
      1.0
      328.63 KB
      PDF
      TN0941

      Reset and supervisor ICs: frequently asked questions (FAQ)

Publications and Collaterals

    • Description Version Size Action
      Resets and supervisors - portfolio overview 1.0
      1.31 MB
      PDF

      Resets and supervisors - portfolio overview

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM1001LWX6F
Active
SOT23 Industrial Ecopack3
STM1001MWX6F
Active
SOT23 Industrial Ecopack3
STM1001RWX6F
Active
SOT23 Industrial Ecopack3
STM1001SBWX6F
Active
SOT23 Industrial Ecopack3
STM1001SWX6F
Active
SOT23 Industrial Ecopack3
STM1001TWX6F
Active
SOT23 Industrial Ecopack3

STM1001LWX6F

Package:

SOT23

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM1001MWX6F

Package:

SOT23

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM1001RWX6F

Package:

SOT23

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM1001SBWX6F

Package:

SOT23

Material Declaration**:

Marketing Status

Active

Package

SOT23

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM1001SWX6F

Package:

SOT23

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM1001TWX6F

Package:

SOT23

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23

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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Temperature (°C) Voltage Reset 1 (V) (typ)
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min
max
STM1001MWX6F Available at 7 distributors

Distributor availability ofSTM1001MWX6F

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DIGIKEY WORLDWIDE 1762 1 Order Now
RS COMPONENTS EUROPE 9475 1 Order Now
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MOUSER WORLDWIDE 6937 1 Order Now
Farnell Element14 EUROPE 2299 1 Order Now

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9475

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2299

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EAR99 NEC Tape And Reel SOT23 -40 85 4.38 0.33 / 1k
MORE INFO

Voltage Reset 2 (V) (typ):

-

Unit Price (US$):

0.33

Country of Origin:

MALAYSIA

STM1001SBWX6F Available at 1 distributors

Distributor availability ofSTM1001SBWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5445 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

5445

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1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-10

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EAR99 NEC Tape And Reel SOT23 -40 85 - 0.33 / 1k
MORE INFO

Voltage Reset 2 (V) (typ):

-

Unit Price (US$):

0.33

Country of Origin:

MALAYSIA

STM1001SWX6F Available at 9 distributors

Distributor availability ofSTM1001SWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5556 1 Order Now
COMPEL EUROPE 3517 1 Order Now
RS COMPONENTS EUROPE 5040 10 Order Now
FUTURE WORLDWIDE 2750 1 Order Now
ARROW EUROPE 9000 0 Order Now
Newark Element14 AMERICA 1039 0 Order Now
ARROW AMERICA 300000 3000 Order Now
MOUSER WORLDWIDE 4991 1 Order Now
Farnell Element14 EUROPE 7246 1 Order Now

Distributor reported inventory date: 2020-08-10

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DIGIKEY

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5556

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

3517

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

5040

Min.Order

10

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EUROPE Order Now

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Stock

2750

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1

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9000

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0

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Newark Element14

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1039

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300000

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3000

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4991

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Farnell Element14

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7246

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1

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Distributor reported inventory date: 2020-08-10

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EAR99 NEC Tape And Reel SOT23 -40 85 2.93 0.33 / 1k
MORE INFO

Voltage Reset 2 (V) (typ):

-

Unit Price (US$):

0.33

Country of Origin:

MALAYSIA

STM1001TWX6F Available at 7 distributors

Distributor availability ofSTM1001TWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4424 1 Order Now
RS COMPONENTS EUROPE 1075 1 Order Now
AVNET AMERICA 146998 0 Order Now
ARROW AMERICA 1 1 Order Now
MOUSER WORLDWIDE 5980 1 Order Now
Farnell Element14 EUROPE 1080 1 Order Now
ANGLIA Live EUROPE 7970 10 Order Now

Distributor reported inventory date: 2020-08-10

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DIGIKEY

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4424

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1075

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

146998

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

1

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

5980

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1080

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

7970

Min.Order

10

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

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Active
EAR99 NEC Tape And Reel SOT23 -40 85 3.08 0.33 / 1k
MORE INFO

Voltage Reset 2 (V) (typ):

-

Unit Price (US$):

0.33

Country of Origin:

MALAYSIA

STM1001RWX6F Available at 6 distributors

Distributor availability ofSTM1001RWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 13552 1 Order Now
COMPEL EUROPE 1646 1 Order Now
RS COMPONENTS EUROPE 550 5 Order Now
AVNET AMERICA 3000 0 Order Now
MOUSER WORLDWIDE 4082 1 Order Now
Farnell Element14 EUROPE 3564 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

13552

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1646

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

550

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

4082

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3564

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

Buy now
Active
EAR99 NEC Tape And Reel SOT23 -40 85 2.63 0.33 / 1k
MORE INFO

Voltage Reset 2 (V) (typ):

-

Unit Price (US$):

0.33

Country of Origin:

MALAYSIA

STM1001LWX6F Available at 5 distributors

Distributor availability ofSTM1001LWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6895 1 Order Now
RS COMPONENTS EUROPE 2575 1 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
ARROW AMERICA 3000 3000 Order Now
MOUSER WORLDWIDE 11484 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

6895

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2575

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

11484

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-10

Buy now
Active
EAR99 NEC Tape And Reel SOT23 -40 85 4.63 0.33 / 1k
MORE INFO

Voltage Reset 2 (V) (typ):

-

Unit Price (US$):

0.33

Country of Origin:

MALAYSIA

STM1001MWX6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.33 / 1k

Distributor availability ofSTM1001MWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1762 1 Order Now
RS COMPONENTS EUROPE 9475 1 Order Now
FUTURE WORLDWIDE 24000 3000 Order Now
ARROW EUROPE 6000 0 Order Now
ARROW AMERICA 15000 3000 Order Now
MOUSER WORLDWIDE 6937 1 Order Now
Farnell Element14 EUROPE 2299 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

1762

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

9475

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

24000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

6000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

15000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

6937

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2299

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23

Operating Temperature (°C)

(min)

-40

(max)

85

Voltage Reset 1 (V) (typ)

4.38

Voltage Reset 2 (V) (typ)

-

Budgetary Price (US$)* / Qty

0.33 / 1k

Country of Origin

MALAYSIA

STM1001SBWX6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.33 / 1k

Distributor availability ofSTM1001SBWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5445 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

5445

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23

Operating Temperature (°C)

(min)

-40

(max)

85

Voltage Reset 1 (V) (typ)

-

Voltage Reset 2 (V) (typ)

-

Budgetary Price (US$)* / Qty

0.33 / 1k

Country of Origin

MALAYSIA

STM1001SWX6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.33 / 1k

Distributor availability ofSTM1001SWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5556 1 Order Now
COMPEL EUROPE 3517 1 Order Now
RS COMPONENTS EUROPE 5040 10 Order Now
FUTURE WORLDWIDE 2750 1 Order Now
ARROW EUROPE 9000 0 Order Now
Newark Element14 AMERICA 1039 0 Order Now
ARROW AMERICA 300000 3000 Order Now
MOUSER WORLDWIDE 4991 1 Order Now
Farnell Element14 EUROPE 7246 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

5556

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

3517

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

5040

Min.Order

10

Region

EUROPE Order Now

FUTURE

Stock

2750

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

9000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1039

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

300000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

4991

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

7246

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23

Operating Temperature (°C)

(min)

-40

(max)

85

Voltage Reset 1 (V) (typ)

2.93

Voltage Reset 2 (V) (typ)

-

Budgetary Price (US$)* / Qty

0.33 / 1k

Country of Origin

MALAYSIA

STM1001TWX6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.33 / 1k

Distributor availability ofSTM1001TWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4424 1 Order Now
RS COMPONENTS EUROPE 1075 1 Order Now
AVNET AMERICA 146998 0 Order Now
ARROW AMERICA 1 1 Order Now
MOUSER WORLDWIDE 5980 1 Order Now
Farnell Element14 EUROPE 1080 1 Order Now
ANGLIA Live EUROPE 7970 10 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

4424

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1075

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

146998

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

1

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

5980

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1080

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

7970

Min.Order

10

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23

Operating Temperature (°C)

(min)

-40

(max)

85

Voltage Reset 1 (V) (typ)

3.08

Voltage Reset 2 (V) (typ)

-

Budgetary Price (US$)* / Qty

0.33 / 1k

Country of Origin

MALAYSIA

STM1001RWX6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.33 / 1k

Distributor availability ofSTM1001RWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 13552 1 Order Now
COMPEL EUROPE 1646 1 Order Now
RS COMPONENTS EUROPE 550 5 Order Now
AVNET AMERICA 3000 0 Order Now
MOUSER WORLDWIDE 4082 1 Order Now
Farnell Element14 EUROPE 3564 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

13552

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1646

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

550

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

4082

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3564

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23

Operating Temperature (°C)

(min)

-40

(max)

85

Voltage Reset 1 (V) (typ)

2.63

Voltage Reset 2 (V) (typ)

-

Budgetary Price (US$)* / Qty

0.33 / 1k

Country of Origin

MALAYSIA

STM1001LWX6F

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.33 / 1k

Distributor availability ofSTM1001LWX6F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6895 1 Order Now
RS COMPONENTS EUROPE 2575 1 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
ARROW AMERICA 3000 3000 Order Now
MOUSER WORLDWIDE 11484 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

6895

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2575

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

11484

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23

Operating Temperature (°C)

(min)

-40

(max)

85

Voltage Reset 1 (V) (typ)

4.63

Voltage Reset 2 (V) (typ)

-

Budgetary Price (US$)* / Qty

0.33 / 1k

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