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.
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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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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 | |
SR1PBBU
Package:
UFDFPN 1X1.45X0.6 6L PITCH0.5Material Declaration**:
(**) 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 | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | Reset pulse width (mS) (min) | Reset pulse width (mS) (max) | ||
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| SR1PBBU | | | distributors No availability of distributors reported, please contact our sales office |
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| SR1HARU | | | distributors No availability of distributors reported, please contact our sales office |
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| SR1CARU | | | distributors No availability of distributors reported, please contact our sales office |
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| SR1PARU | | | distributors No availability of distributors reported, please contact our sales office |
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| SR1PAAU | | | distributors No availability of distributors reported, please contact our sales office |
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| SR1LARU | | | distributors No availability of distributors reported, please contact our sales office |
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SR1PBBU Active
SR1HARU Active
SR1CARU Active
SR1PARU Active
SR1PAAU Active
SR1LARU Active
(*) 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