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  • The Smart ResetTMdevices provide a useful feature which ensures that inadvertent short reset push-button closures do not cause system resets. This is done by implementing an extended Smart Reset input delay time (tSRC), which 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 is connected to the microcontroller interrupt input, and is 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 SR1 has one Smart Reset input (SR) with preset delayed Smart Reset setup time (tSRC). The reset output (RST) is asserted after the Smart Reset input is held active for the selected tSRCdelay time. The RSToutput remains asserted either until the 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 device fully operates over a broad VCCrange from 2.0 V to 5.5 V.

    Key Features

    • Operating voltage range 2 V to 5.5 V
    • Low supply current 1 μA
    • Integrated test mode
    • Single Smart Reset™ push-button input with fixed extended reset setup delay (tSRC) from 0.5 s to 10 s in 0.5 s steps (typ.), option with internal input 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
    • 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 1.00 mm x 1.45 mm
    • ECOPACK®2 (RoHS compliant, Halogen-Free)

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SR1CARU
Active
UFDFPN 1X1.45X0.6 6L PITCH0.5 Industrial Ecopack3
SR1HARU
Active
UFDFPN 1X1.45X0.6 6L PITCH0.5 Industrial Ecopack3
SR1LARU
Active
UFDFPN 1X1.45X0.6 6L PITCH0.5 Industrial Ecopack3
SR1PAAU
Active
UFDFPN 1X1.45X0.6 6L PITCH0.5 Industrial Ecopack3
SR1PARU
Active
UFDFPN 1X1.45X0.6 6L PITCH0.5 Industrial Ecopack3
SR1PBBU
Active
UFDFPN 1X1.45X0.6 6L PITCH0.5 Industrial Ecopack3

SR1CARU

Package:

UFDFPN 1X1.45X0.6 6L PITCH0.5

Material Declaration**:

Marketing Status

Active

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR1HARU

Package:

UFDFPN 1X1.45X0.6 6L PITCH0.5

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR1LARU

Package:

UFDFPN 1X1.45X0.6 6L PITCH0.5

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR1PAAU

Package:

UFDFPN 1X1.45X0.6 6L PITCH0.5

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR1PARU

Package:

UFDFPN 1X1.45X0.6 6L PITCH0.5

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack3

SR1PBBU

Package:

UFDFPN 1X1.45X0.6 6L PITCH0.5

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

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
Package
Packing Type
Reset pulse width (mS) (min)
Reset pulse width (mS) (max)
Temperature (°C) Marketing Status
Budgetary Price (US$)*/Qty
More info
min
max
SR1PBBU Available at 1 distributors

Distributor availability ofSR1PBBU

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 461 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

Farnell Element14

Stock

461

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Get sample UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape And Reel 1.28 360 -40
Active
85 0.3 / 1k
MORE INFO

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

SR1HARU Available at 2 distributors

Distributor availability ofSR1HARU

Distributor Name
Region Stock Min. Order Third party link
P&S ASIA/PACIFIC 445 1 Order Now
Farnell Element14 EUROPE 1868 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

P&S

Stock

445

Min.Order

1

Region

ASIA/PACIFIC Order Now

Farnell Element14

Stock

1868

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Get sample UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape And Reel 1.28 360 -40
Active
85 0.3 / 1k
MORE INFO

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

SR1CARU Available at 1 distributors

Distributor availability ofSR1CARU

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 889 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

MOUSER

Stock

889

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-06-29

Get sample UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape And Reel 1.28 360 -40
Active
85 0.3 / 1k
MORE INFO

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

SR1PARU Available at 5 distributors

Distributor availability ofSR1PARU

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2995 1 Order Now
COMPEL EUROPE 3 1 Order Now
P&S ASIA/PACIFIC 500 1 Order Now
MOUSER WORLDWIDE 3000 1 Order Now
Farnell Element14 EUROPE 3076 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

DIGIKEY

Stock

2995

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

3

Min.Order

1

Region

EUROPE Order Now

P&S

Stock

500

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

3000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3076

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Get sample UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape And Reel 1.28 360 -40
Active
85 0.3 / 1k
MORE INFO

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

SR1PAAU No availability of distributors reported, please contact our sales office Buy now UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape And Reel 1.28 360 -40
Active
85 0.3 / 1k
MORE INFO

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

SR1LARU No availability of distributors reported, please contact our sales office UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape And Reel 1.28 360 -40
Active
85 0.3 / 1k
MORE INFO

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

SR1PBBU

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.3 / 1k

Distributor availability ofSR1PBBU

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 461 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

Farnell Element14

Stock

461

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.3 / 1k

(max)

85

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

SR1HARU

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.3 / 1k

Distributor availability ofSR1HARU

Distributor Name
Region Stock Min. Order Third party link
P&S ASIA/PACIFIC 445 1 Order Now
Farnell Element14 EUROPE 1868 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

P&S

Stock

445

Min.Order

1

Region

ASIA/PACIFIC Order Now

Farnell Element14

Stock

1868

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.3 / 1k

(max)

85

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

SR1CARU

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.3 / 1k

Distributor availability ofSR1CARU

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 889 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

MOUSER

Stock

889

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-06-29

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.3 / 1k

(max)

85

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

SR1PARU

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.3 / 1k

Distributor availability ofSR1PARU

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2995 1 Order Now
COMPEL EUROPE 3 1 Order Now
P&S ASIA/PACIFIC 500 1 Order Now
MOUSER WORLDWIDE 3000 1 Order Now
Farnell Element14 EUROPE 3076 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

DIGIKEY

Stock

2995

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

3

Min.Order

1

Region

EUROPE Order Now

P&S

Stock

500

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

3000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3076

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.3 / 1k

(max)

85

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

SR1PAAU

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.3 / 1k

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.3 / 1k

(max)

85

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

SR1LARU

Package

UFDFPN 1X1.45X0.6 6L PITCH0.5

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.3 / 1k

Reset pulse width (mS) (min)

1.28

Reset pulse width (mS) (max)

360

Operating Temperature (°C)

(min)

-40

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.3 / 1k

(max)

85

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