Product overview

Description

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.

  • All 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)

EDA Symbols, Footprints and 3D Models

STMicroelectronics - SR1

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Symbols

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3D models

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**:

PDF XML

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

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Part Number
Marketing Status
Budgetary Price (US$)*/Qty
Order from ST
Order from distributors
Package
Packing Type
RoHS
Country of Origin
ECCN (US)
ECCN (EU)
Temperature (°C)
Operating Temperature (°C) (min)
Reset pulse width (mS) (min)
Reset pulse width (mS) (max)
min
max
SR1PBBU
Available at distributors

Distributor availability of SR1PBBU

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape and Reel PHILIPPINES EAR99 NEC -40 85

-40

240

480

SR1HARU
Available at distributors

Distributor availability of SR1HARU

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape and Reel PHILIPPINES EAR99 NEC -40 85

-40

-

-

SR1CARU
Available at distributors

Distributor availability of SR1CARU

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape and Reel PHILIPPINES EAR99 NEC -40 85

-40

-

-

SR1PARU
Available at distributors

Distributor availability of SR1PARU

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape and Reel PHILIPPINES EAR99 NEC -40 85

-40

-

-

SR1PAAU
Available at distributors

Distributor availability of SR1PAAU

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape and Reel PHILIPPINES EAR99 NEC -40 85

-40

140

280

SR1LARU
Available at distributors

Distributor availability of SR1LARU

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
UFDFPN 1X1.45X0.6 6L PITCH0.5 Tape and Reel PHILIPPINES EAR99 NEC -40 85

-40

-

-

SR1PBBU Active

Budgetary Price (US$)*/Qty:
-
Package:
UFDFPN 1X1.45X0.6 6L PITCH0.5
Packing Type:
Tape and Reel
RoHS:
-
Country of Origin:
PHILIPPINES
ECCN (US):
EAR99
ECCN (EU):
NEC

Part Number:

SR1PBBU

Operating Temperature (°C)

Min:

-40

Max:

85

Reset pulse width (mS) (min):

240

Reset pulse width (mS) (max):

480

SR1HARU Active

Budgetary Price (US$)*/Qty:
-
Package:
UFDFPN 1X1.45X0.6 6L PITCH0.5
Packing Type:
Tape and Reel
RoHS:
-
Country of Origin:
PHILIPPINES
ECCN (US):
EAR99
ECCN (EU):
NEC

Part Number:

SR1HARU

Operating Temperature (°C)

Min:

-40

Max:

85

Reset pulse width (mS) (min):

-

Reset pulse width (mS) (max):

-

Distributor Name

Distributor reported inventory date:

SR1CARU Active

Budgetary Price (US$)*/Qty:
-
Package:
UFDFPN 1X1.45X0.6 6L PITCH0.5
Packing Type:
Tape and Reel
RoHS:
-
Country of Origin:
PHILIPPINES
ECCN (US):
EAR99
ECCN (EU):
NEC

Part Number:

SR1CARU

Operating Temperature (°C)

Min:

-40

Max:

85

Reset pulse width (mS) (min):

-

Reset pulse width (mS) (max):

-

Distributor Name

Distributor reported inventory date:

SR1PARU Active

Budgetary Price (US$)*/Qty:
-
Package:
UFDFPN 1X1.45X0.6 6L PITCH0.5
Packing Type:
Tape and Reel
RoHS:
-
Country of Origin:
PHILIPPINES
ECCN (US):
EAR99
ECCN (EU):
NEC

Part Number:

SR1PARU

Operating Temperature (°C)

Min:

-40

Max:

85

Reset pulse width (mS) (min):

-

Reset pulse width (mS) (max):

-

Distributor Name

Distributor reported inventory date:

SR1PAAU Active

Budgetary Price (US$)*/Qty:
-
Package:
UFDFPN 1X1.45X0.6 6L PITCH0.5
Packing Type:
Tape and Reel
RoHS:
-
Country of Origin:
PHILIPPINES
ECCN (US):
EAR99
ECCN (EU):
NEC

Part Number:

SR1PAAU

Operating Temperature (°C)

Min:

-40

Max:

85

Reset pulse width (mS) (min):

140

Reset pulse width (mS) (max):

280

Distributor Name

Distributor reported inventory date:

SR1LARU Active

Budgetary Price (US$)*/Qty:
-
Package:
UFDFPN 1X1.45X0.6 6L PITCH0.5
Packing Type:
Tape and Reel
RoHS:
-
Country of Origin:
PHILIPPINES
ECCN (US):
EAR99
ECCN (EU):
NEC

Part Number:

SR1LARU

Operating Temperature (°C)

Min:

-40

Max:

85

Reset pulse width (mS) (min):

-

Reset pulse width (mS) (max):

-

Distributor Name

Distributor reported inventory date:

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