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  • The STM809/810/811/812 MICROPROCESSOR RESET Circuits are low-power supervisory devices used to monitor power supplies. They perform 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). The STM811/812 also provide a push-button reset input (MR).

    Key Features

    • Lead-free, small SOT23 and SOT143 package
    • Operating temperature: –40 °C to 85 °C (industrial grade)
    • Precision monitoring of 3 V, 3.3 V, and 5 V supply voltages
    • 140 ms reset pulse width (min)
    • Two output configurationsPush-pull RST output (STM809/811)Push-pull RST output (STM810/812)
    • Guaranteed RST/RST assertion down to VCC = 1.0 V
    • Low supply current - 6 µA (typ)

Circuit Diagram

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Part Number
Package
Packing Type
Voltage Reset 1 (V) (typ)
Voltage Reset 2 (V) (typ)
Temperature (°C) Marketing Status
Budgetary Price (US$)*
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min
max
STM812TW16F SOT-143 4 Tape And Reel 3.08 - -40 85
Active
0.33
MORE INFO

Quantity:

1000

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

Check Availability

Distributor availability ofSTM812TW16F

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DIGIKEY WORLDWIDE 2864 1 Order Now
RS COMPONENTS EUROPE 1830 1 Order Now
AVNET AMERICA 12000 0 Order Now
Newark Element14 AMERICA 6000 0 Order Now
ARROW AMERICA 6000 3000 Order Now

Distributor reported inventory date: 2019-09-16

Distributor Name

DIGIKEY

Stock

2864

Min.Order

1

Region

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Stock

1830

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

12000

Min.Order

0

Region

AMERICA Order Now

Newark Element14

Stock

6000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

Distributor reported inventory date: 2019-09-16

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STM812SW16F SOT-143 4 Tape And Reel 2.93 - -40 85
Active
0.33
MORE INFO

Quantity:

1000

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

Check Availability

Distributor availability ofSTM812SW16F

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RS COMPONENTS EUROPE 1690 1 Order Now
MOUSER WORLDWIDE 4495 1 Order Now

Distributor reported inventory date: 2019-09-16

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RS COMPONENTS

Stock

1690

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1

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Stock

4495

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1

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Distributor reported inventory date: 2019-09-16

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STM812LW16F SOT-143 4 Tape And Reel 4.63 - -40 85
Active
0.33
MORE INFO

Quantity:

1000

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

Check Availability

Distributor availability ofSTM812LW16F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 601 1 Order Now
RS COMPONENTS EUROPE 325 1 Order Now
MOUSER WORLDWIDE 3514 1 Order Now
ANGLIA Live EUROPE 36000 3000 Order Now

Distributor reported inventory date: 2019-09-17

Distributor Name

DIGIKEY

Stock

601

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1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

325

Min.Order

1

Region

EUROPE Order Now

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Stock

3514

Min.Order

1

Region

WORLDWIDE Order Now

ANGLIA Live

Stock

36000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-17

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STM812RW16F SOT-143 4 Tape And Reel 2.63 - -40 85
Active
0.33
MORE INFO

Quantity:

1000

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

No availability of distributors reported, please contact our sales office
STM812MW16F SOT-143 4 Tape And Reel 4.38 - -40 85
Active
0.33
MORE INFO

Quantity:

1000

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

Check Availability

Distributor availability ofSTM812MW16F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2122 1 Order Now
MOUSER WORLDWIDE 9919 1 Order Now

Distributor reported inventory date: 2019-09-16

Distributor Name

DIGIKEY

Stock

2122

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

9919

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-16

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STM812TW16F

Package

SOT-143 4

Packing Type

Tape And Reel

Unit Price (US$)

0.33*

Distributor availability ofSTM812TW16F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2864 1 Order Now
RS COMPONENTS EUROPE 1830 1 Order Now
AVNET AMERICA 12000 0 Order Now
Newark Element14 AMERICA 6000 0 Order Now
ARROW AMERICA 6000 3000 Order Now

Distributor reported inventory date: 2019-09-16

Distributor Name

DIGIKEY

Stock

2864

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1830

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

12000

Min.Order

0

Region

AMERICA Order Now

Newark Element14

Stock

6000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

Distributor reported inventory date: 2019-09-16

Voltage Reset 1 (V) (typ)

3.08

Voltage Reset 2 (V) (typ)

-

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

0.33

Quantity

1000

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

STM812SW16F

Package

SOT-143 4

Packing Type

Tape And Reel

Unit Price (US$)

0.33*

Distributor availability ofSTM812SW16F

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 1690 1 Order Now
MOUSER WORLDWIDE 4495 1 Order Now

Distributor reported inventory date: 2019-09-16

Distributor Name

RS COMPONENTS

Stock

1690

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

4495

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-16

Voltage Reset 1 (V) (typ)

2.93

Voltage Reset 2 (V) (typ)

-

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

0.33

Quantity

1000

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

STM812LW16F

Package

SOT-143 4

Packing Type

Tape And Reel

Unit Price (US$)

0.33*

Distributor availability ofSTM812LW16F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 601 1 Order Now
RS COMPONENTS EUROPE 325 1 Order Now
MOUSER WORLDWIDE 3514 1 Order Now
ANGLIA Live EUROPE 36000 3000 Order Now

Distributor reported inventory date: 2019-09-17

Distributor Name

DIGIKEY

Stock

601

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

325

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

3514

Min.Order

1

Region

WORLDWIDE Order Now

ANGLIA Live

Stock

36000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-17

Voltage Reset 1 (V) (typ)

4.63

Voltage Reset 2 (V) (typ)

-

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

0.33

Quantity

1000

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

STM812RW16F

Package

SOT-143 4

Packing Type

Tape And Reel

Unit Price (US$)

0.33*

Voltage Reset 1 (V) (typ)

2.63

Voltage Reset 2 (V) (typ)

-

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

0.33

Quantity

1000

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

STM812MW16F

Package

SOT-143 4

Packing Type

Tape And Reel

Unit Price (US$)

0.33*

Distributor availability ofSTM812MW16F

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2122 1 Order Now
MOUSER WORLDWIDE 9919 1 Order Now

Distributor reported inventory date: 2019-09-16

Distributor Name

DIGIKEY

Stock

2122

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

9919

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-16

Voltage Reset 1 (V) (typ)

4.38

Voltage Reset 2 (V) (typ)

-

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

0.33

Quantity

1000

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

(*) 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

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS3546
      Reset circuit
      5.1
      413.2 KB
      PDF
      DS3546

      Reset circuit

    • Description Version Size Action
      AN1790
      How to connect ST reset circuits to a microprocessor
      1.4
      84.97 KB
      PDF
      AN1772
      How to control power-up/reset and monitor the voltage in microprocessor systems using ST reset circuits
      1.5
      75.06 KB
      PDF
      AN1790

      How to connect ST reset circuits to a microprocessor

      AN1772

      How to control power-up/reset and monitor the voltage in microprocessor systems using ST reset circuits

    • 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
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      Resets and supervisors - portfolio overview

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM812LW16F
Active
SOT-143 4 Industrial Ecopack3
STM812MW16F
Active
SOT-143 4 Industrial Ecopack3
STM812RW16F
Active
SOT-143 4 Industrial Ecopack3
STM812SW16F
Active
SOT-143 4 Industrial Ecopack3
STM812TW16F
Active
SOT-143 4 Industrial Ecopack3

STM812LW16F

Package:

SOT-143 4

Material Declaration**:

Marketing Status

Active

Package

SOT-143 4

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM812MW16F

Package:

SOT-143 4

Material Declaration**:

Marketing Status

Active

Package

SOT-143 4

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM812RW16F

Package:

SOT-143 4

Material Declaration**:

Marketing Status

Active

Package

SOT-143 4

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM812SW16F

Package:

SOT-143 4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT-143 4

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM812TW16F

Package:

SOT-143 4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT-143 4

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.