STM6522:dual push-button smart reset with capacitor-adjustable setup delay

The Smart Reset™ devices provide a useful feature that ensures that inadvertent short reset push-button closures do not cause system resets as the extended Smart Reset™ delay setup periods are implemented. Once the valid Smart Reset™ input levels and setup delay are met, the device generates an output reset pulse for a fixed timeout period (tREC).

The typical application hookup shows that either a single Smart Reset™ input, or both reset inputs can be connected to the applications interrupt and control both the interrupt pin and the hard reset functions. If the push-button is closed for a short time, the processor is only interrupted. If the system still does not respond properly, holding the push-button(s) for the extended setup time (tSRC) causes a hard reset of the processor. The Smart Reset™ feature helps significantly increase system stability and eliminates the need for a dedicated reset button.

The STM65xx family of Smart Reset™ devices consists of low-current microprocessor reset circuits targeted at applications such as MP3 players, portable navigation or mobile phones, generally any application that requires delayed reset push-button(s) response for improved system stability. The devices in the STM65xx Smart Reset™ family include various combinations of useful features for the targeted applications.

The STM6522 has two combined Smart Reset™ inputs (SR0and SR1) with delayed reset setup time (tSRC) programmed by an external capacitor on the SRC pin.

Key Features

  • Dual Smart Reset™ push-button inputs with capacitor-adjustable extended reset setup delay (tSRC )
  • No power-on reset
  • Dual RST output, active-low, open-drain
  • Fixed Smart Reset™ input logic voltage levels
  • Broad operating voltage range 1.65 V to 5.5 V, inactive reset output levels valid down to 1.0 V
  • Low supply current (1.5 μA)
  • Operating temperature: industrial grade –40 °C to +85 °C
  • TDFN8 package: 2 mm x 2 mm x 0.75 mm
  • RoHS compliant
Product Specifications
DescriptionVersionSize
DS6695: Dual push-button Smart Reset™ with capacitor-adjustable setup delay3.0280 KB
Application Notes
DescriptionVersionSize
AN3261: Dual push-button Smart Reset™ devices with user-adjustable setup delays1.1630 KB
Technical Notes & Articles
DescriptionVersionSize
TN0941: Reset and supervisor ICs: frequently asked questions (FAQ)1.0328 KB
Presentations
DescriptionVersionSize
Health and Wellness Mobility Cloud computing1 MB
ST offering in Wearable - Analog and Mixed Signal Portfolio3.01 MB
Flyers
DescriptionVersionSize
Resets and supervisors - portfolio overview1.01 MB
Smart Reset ICs dual push-button1.0767 KB
Brochures
DescriptionVersionSize
ST’s solutions for mobile devices3.23 MB
Sample & Buy
Part NumberPackagePacking TypeReset pulse width (mS) (min)Reset pulse width (mS) (max)Operating Temperature (°C) (min)Unit Price (US$) *QuantityOperating Temperature (°C) (max)ECCN (EU)ECCN (US)Country of Origin
STM6522AAAADG6FDFN8 2x1x0.55Tape And Reel210210-400.46100085NECEAR99MALAYSIA
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STM6522AAAADG6FDFN8 2x1x0.55IndustrialEcopack3md_dg-wspc-dfn-wspc-2x2x0.75-wspc-8l-wspc-pitch-wspc-0.5_ezdg-wspc-t6bacal.pdf
md_dg-wspc-dfn-wspc-2x2x0.xml
Dual push-button Smart Reset™ with capacitor-adjustable setup delay STM6522
circuit_diagram_17045_thumbnail.png STM6522
Dual push-button Smart Reset™ devices with user-adjustable setup delays STM6522
Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R
Tutorial for MEMS microphones MP23AB02B
Filter-free stereo 2.8 W class D audio power amplifier with selectable 3D sound effects TS4999
Reset and supervisor ICs: frequently asked questions (FAQ) STM805T-S-R
Reset and supervisor ICs: frequently asked questions (FAQ) STM6522
1.2 megapixel high dynamic range image sensor VD8640
md_dg-wspc-dfn-wspc-2x2x0.75-wspc-8l-wspc-pitch-wspc-0.5_ezdg-wspc-t6bacal.pdf STM6522
md_dg-wspc-dfn-wspc-2x2x0.xml STM6522