SR2

Active

6 pin Smart Reset

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  • The Smart Reset™ devices provide a useful feature that ensures inadvertent short reset push-button closures do not cause system resets. This is done by implementing extended Smart Reset™ input delay time (tSRC) and combined push-button inputs, which together ensures a safe reset and eliminates the need for a specific dedicated reset button.

    This reset configuration provides versatility and allows the application to distinguish between a software generated interrupt and a hard system reset. When the input push-button are connected to microcontroller interrupt inputs, and are closed for a short time, the processor can only be interrupted. If the system still does not respond properly, continuing to keep the push-button closed for the extended setup time tSRCcauses a hard reset of the processor through the reset output.
    The SR2 has two combined delayed Smart Reset™ inputs (SR0, SR1) with preset delayed Smart Reset™ setup time (tSRC). The reset output is asserted after both of the Smart Reset™ inputs were held active for the selected tSRCdelay time. Depending on selected option the RSToutput remains asserted either until at least one SRinput goes to inactive logic level (i.e. neither fixed nor minimum reset pulse width is set) or the output reset pulse duration is fixed for tREC(i.e. factory-programmed). The reset output, RST, is active low or active high, push-pull or open drain with optional pull-up resistor. The device fully operates over a broad VCCrange 1.65 V to 5.5 V. Below 1.575 V typ. the inputs are ignored and outputs are deasserted; the deasserted reset output levels are then valid down to 1.0 V.

    Key Features

    • Operating voltage 1.65 V to 5.5 V
    • Low supply current 1.5 μA
    • Integrated test mode
    • Dual Smart Reset™ push-button inputs with fixed extended reset setup delay (tSRC) from 0.5 s to 10 s in 0.5 s steps (typ.), option with internal pull-up resistor
    • Push-button controlled reset pulse duration
      • Option 1: fully push-button controlled, no fixed or minimum pulse width guaranteed
      • Option 2: defined output reset pulse duration (tREC), factory-programmed
    • No power-on reset
    • Single reset output
      • Active low or active high
      • Push-pull or open drain with optional pull-up resistor
    • Fixed Smart Reset™ input logic voltage levels
    • Operating temperature: - 40 °C to +85 °C
    • UDFN6 package: 1.6 mm x 1.3 mm
    • ECOPACK®2 (RoHS compliant, Halogen-Free)

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Part Number
Package
Packing Type
Reset pulse width (mS) (min)
Reset pulse width (mS) (max)
Temperature (°C) Marketing Status
Budgetary Price (US$)*
More info
Order from Distributors
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min
max
SR2HARU UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Tape And Reel 1.28 360 -40
Active
0.3 1000
MORE INFO

Operating Temperature (°C) (max):

85

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofSR2HARU

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 419 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

Farnell Element14

Stock

419

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Get sample
SR2LARU UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Tape And Reel 1.28 360 -40
Active
0.3 1000
MORE INFO

Operating Temperature (°C) (max):

85

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofSR2LARU

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 3000 1 Order Now
Farnell Element14 EUROPE 2900 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

MOUSER

Stock

3000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2900

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Get sample
SR2UABU UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Tape And Reel 1.28 360 -40
Active
0.3 1000
MORE INFO

Operating Temperature (°C) (max):

85

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofSR2UABU

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 42 1 Order Now
AVNET AMERICA 45000 0 Order Now
ARROW AMERICA 3000 3000 Order Now
P&S ASIA/PACIFIC 480 1 Order Now
Farnell Element14 EUROPE 937 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

DIGIKEY

Stock

42

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

45000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

3000

Region

AMERICA Order Now

P&S

Stock

480

Min.Order

1

Region

ASIA/PACIFIC Order Now

Farnell Element14

Stock

937

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Get sample
SR2UARU UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Tape And Reel 1.28 360 -40
Active
0.3 1000
MORE INFO

Operating Temperature (°C) (max):

85

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofSR2UARU

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 3000 1 Order Now
Farnell Element14 EUROPE 2426 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

MOUSER

Stock

3000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2426

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Get sample
SR2PARU UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Tape And Reel 1.28 360 -40
Active
0.3 1000
MORE INFO

Operating Temperature (°C) (max):

85

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofSR2PARU

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 2930 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

Farnell Element14

Stock

2930

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Get sample
SR2LABU UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Tape And Reel 1.28 360 -40
Active
0.3 1000
MORE INFO

Operating Temperature (°C) (max):

85

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofSR2LABU

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1743 1 Order Now
MOUSER WORLDWIDE 2892 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

DIGIKEY

Stock

1743

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2892

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-13

Get sample

SR2HARU

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Packing Type

Tape And Reel

Unit Price (US$)

0.3*

Distributor availability ofSR2HARU

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 419 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

Farnell Element14

Stock

419

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Unit Price (US$)

0.3

Quantity

1000

(max)

85

ECCN (US)

EAR99

Country of Origin

CHINA

SR2LARU

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Packing Type

Tape And Reel

Unit Price (US$)

0.3*

Distributor availability ofSR2LARU

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 3000 1 Order Now
Farnell Element14 EUROPE 2900 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

MOUSER

Stock

3000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2900

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Unit Price (US$)

0.3

Quantity

1000

(max)

85

ECCN (US)

EAR99

Country of Origin

CHINA

SR2UABU

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Packing Type

Tape And Reel

Unit Price (US$)

0.3*

Distributor availability ofSR2UABU

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 42 1 Order Now
AVNET AMERICA 45000 0 Order Now
ARROW AMERICA 3000 3000 Order Now
P&S ASIA/PACIFIC 480 1 Order Now
Farnell Element14 EUROPE 937 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

DIGIKEY

Stock

42

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

45000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

3000

Region

AMERICA Order Now

P&S

Stock

480

Min.Order

1

Region

ASIA/PACIFIC Order Now

Farnell Element14

Stock

937

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Unit Price (US$)

0.3

Quantity

1000

(max)

85

ECCN (US)

EAR99

Country of Origin

CHINA

SR2UARU

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Packing Type

Tape And Reel

Unit Price (US$)

0.3*

Distributor availability ofSR2UARU

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 3000 1 Order Now
Farnell Element14 EUROPE 2426 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

MOUSER

Stock

3000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2426

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Unit Price (US$)

0.3

Quantity

1000

(max)

85

ECCN (US)

EAR99

Country of Origin

MALAYSIA

SR2PARU

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Packing Type

Tape And Reel

Unit Price (US$)

0.3*

Distributor availability ofSR2PARU

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 2930 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

Farnell Element14

Stock

2930

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-13

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Unit Price (US$)

0.3

Quantity

1000

(max)

85

ECCN (US)

EAR99

Country of Origin

CHINA

SR2LABU

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Packing Type

Tape And Reel

Unit Price (US$)

0.3*

Distributor availability ofSR2LABU

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1743 1 Order Now
MOUSER WORLDWIDE 2892 1 Order Now

Distributor reported inventory date: 2019-12-13

Distributor Name

DIGIKEY

Stock

1743

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2892

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-13

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Unit Price (US$)

0.3

Quantity

1000

(max)

85

ECCN (US)

EAR99

Country of Origin

CHINA

(*) 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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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SR2HARU
Active
UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Industrial Ecopack3
SR2LABU
Active
UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Industrial Ecopack3
SR2LARU
Active
UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Industrial Ecopack3
SR2PARU
Active
UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Industrial Ecopack3
SR2UABU
Active
UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Industrial Ecopack3
SR2UARU
Active
UDFN-6L 1.3X1.6 X0.55,PITCH 0.40 Industrial Ecopack3

SR2HARU

Package:

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Material Declaration**:

Marketing Status

Active

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR2LABU

Package:

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Material Declaration**:

Marketing Status

Active

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR2LARU

Package:

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Material Declaration**:

Marketing Status

Active

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR2PARU

Package:

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Material Declaration**:

Marketing Status

Active

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR2UABU

Package:

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR2UARU

Package:

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

Material Declaration**:

Marketing Status

Active

Package

UDFN-6L 1.3X1.6 X0.55,PITCH 0.40

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.

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