Smart Reset™ ICs Dual push-button Enhance end-products robustness ST’s family of Smart Reset™ ICs provides dual-assert manualreset (push-button) inputs called smart reset inputs that make it possible to reliably resolve a system hang or freeze condition. Dual-assert manual-reset inputs require the user to assert two inputs simultaneously to initiate the system reset function (except the STM6504 which is edge triggered). This dual-key approach is more advanced than conventional single pushbutton resetting because it prevents the system from accidentally resetting. ST’s Smart Reset™ ICs allow the designer to use existing buttons to reset a device and eliminates the need for an unsightly reset access hole or a dedicated reset button. KEY FEATURES KEY BENEFITS • Wide operating voltage: 1.0 to 5.5 V • Ideal for touchscreens or low-pin-count • Low supply current: 1 to 2 μA (typ.) • Voltage thresholds monitoring: 1.575 to 4.625 V • Open-drain or push-pull output • Active-high or active-low reset • Adjustable input reset delay: 0.5 s to 12.5 s (typ.) • Adjustable reset pulse width: 1.28 to 2240 ms • Power-on reset • Test mode • Operating temperature: -40 to +85 °C • DFN6 or DFN8 package devices • Smart recovery from system freeze or product misuse • Increases product robustness / perception of quality • Enhanced end user satisfaction • Also suitable for hidden functionality (not only reset): e.g. data sync, device pairing, shortcuts, etc. KEY APPLICATIONS • Smartphones, tablets, smart watches • Wearable / IoT devices • Multimedia and MP3 players • Activity trackers • Portable navigation devices • Any application that requires 1 or 2 delayed push buttons www.st.com/reset TYPICAL APPLICATION SET-UP VCC VCC VCC RST STM65 device RESET CSRC SR1 MCU/ Baseband/ PMU LED SR0 IO/INT/NMI IO/INT GND VSS Push-button switch Push-button switch SMART RESET PRODUCT RANGE Number of monitored voltages Input reset configuration Input reset delay (s) Reset pulse configuration Reset pulse width (s) Package (mm) Others STM6503 1 Three-state [2 - 10] Factory-programmed [0.14 - 0.48] DFN8 2x1x0.55 - STM6505 2 Capacitor-adjustable [2 - 15] Factory-programmed [0.21 - 0.36] DFN8 2x1x0.55 - STM6510 1 Capacitor-adjustable [1 - 15] Capacitor-adjustable [0.01 - 2.24] DFN8 2x1x0.55 - STM6513 1 Three-state [2 - 10] Capacitor-adjustable [0.01 - 2.24] DFN8 2x1x0.55 1 push-pull output STM6519 0 Factory-trimming [0.5 - 10] Factory-programmed [0.001 - 0.36] QFN6 1x1.45x0.55 Customer test mode STM6520 0 Dual-state [7.5 - 12.5] - - DFN8 2x1x0.55 1 push-pull output STM6522 0 Capacitor-adjustable [2 - 15] Factory-programmed 0.21 DFN8 2x1x0.55 - STM6524 0 Factory-trimming [0.5 - 10] Factory-programmed [0.001 - 0.36] DFN6 1.3X1.6 X0.55 Customer test mode Part number © STMicroelectronics - February 2015 - Printed in United Kingdom - All rights reserved The STMicroelectronics corporate logo is a registered trademark of the STMicroelectronics group of companies All other names are the property of their respective owners Order code: FLSTM65XX0215 For more information on ST products and solutions, visit www.st.com