ST Life.augmented

SR2

6 pin Smart Reset
  • active Active

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.

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Errata Sheet
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Datasheet

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)

Design Resources

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Technical Documentation

Product Specifications

Description Version Size
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DS10239: 6 pin Smart Reset™
2.0 465 KB

Presentations & Training Material

Presentations

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ST offering in Wearable - Analog and Mixed Signal Portfolio
1,508 KB

Publications and Collaterals

Flyer

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Resets and supervisors - portfolio overview
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Brochure

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Analog ICs for wearable devices
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ST’s solutions for mobile devices
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Sample & Buy

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Part Number Marketing StatusPackagePacking TypeReset pulse width (min) Reset pulse width (max) Operating Temperature (min) Operating Temperature (max) Order From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
SR2HARUActiveUDFN-6L 1.3X1.6 X0.55,PITCH 0.40Tape And Reel1.28360-4085Free Samples.3Distributor reported inventory date: 2014-10-22
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA30003000
P&SOrder NowASIA/PACIFIC5001
DIGIKEYOrder NowWORLDWIDE30003000
MOUSEROrder NowWORLDWIDE30001
Ecopack2-
SR2LABUActiveUDFN-6L 1.3X1.6 X0.55,PITCH 0.40Tape And Reel1.28360-4085Free Samples.3Distributor reported inventory date: 2014-10-22
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA30003000
P&SOrder NowASIA/PACIFIC5001
DIGIKEYOrder NowWORLDWIDE30003000
MOUSEROrder NowWORLDWIDE30001
Ecopack2-
SR2LARUActiveUDFN-6L 1.3X1.6 X0.55,PITCH 0.40Tape And Reel1.28360-4085Free Samples.3Distributor reported inventory date: 2014-10-22
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA30003000
P&SOrder NowASIA/PACIFIC5001
DIGIKEYOrder NowWORLDWIDE30003000
MOUSEROrder NowWORLDWIDE30001
Ecopack2-
SR2PARUActiveUDFN-6L 1.3X1.6 X0.55,PITCH 0.40Tape And Reel1.28360-4085Free Samples.3Distributor reported inventory date: 2014-10-22
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA30003000
P&SOrder NowASIA/PACIFIC5001
DIGIKEYOrder NowWORLDWIDE30003000
MOUSEROrder NowWORLDWIDE30001
Ecopack2PDF
XML
SR2UABUActiveUDFN-6L 1.3X1.6 X0.55,PITCH 0.40Tape And Reel1.28360-4085Free Samples.3Distributor reported inventory date: 2014-10-22
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA30003000
P&SOrder NowASIA/PACIFIC5001
DIGIKEYOrder NowWORLDWIDE30003000
MOUSEROrder NowWORLDWIDE30001
Ecopack2-
SR2UARUActiveUDFN-6L 1.3X1.6 X0.55,PITCH 0.40Tape And Reel1.28360-4085Free Samples.3Distributor reported inventory date: 2014-10-22
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA30003000
P&SOrder NowASIA/PACIFIC5001
DIGIKEYOrder NowWORLDWIDE30003000
MOUSEROrder NowWORLDWIDE30001
Ecopack2-

(*) 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
(**) 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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