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STM6513：Dual push-button smart reset with dual reset outputs and user-selectable setup delay

The STM6513 has two separate delayed Smart Reset inputs (SR0, SR1) which when taken low simultaneously provide three user-selectable delayed Smart Reset setup time (t_SRC) options of 2 s, 6 s and 10 s. These are selected through a three-state TSR input pin: when connected to ground, t_SRC= 2 s; when left open, t_SRC= 6 s; when connected to V_CC, t_SRC= 10 s (all the times are minimum). There are two reset outputs, both going active simultaneously after both the Smart Reset inputs were held active for the selected t_SRCdelay time. The first reset output, RST1, is active-high, push-pull; the second reset output, RST2, is active-low, open-drain requiring an external pull-up resistor. The duration of the output reset pulses is independently programmable: t_REC1is user-programmable (by external capacitor C_tREC), t_REC2is factory-programmed to 210 ms (typ.), with the option of 360 ms typ. Additionally, the V_CCis monitored and if it drops below the selected V_RSTthreshold, both the reset outputs go active and remain so while V_CCis below the V_RSTthreshold, plus the defined duration of the reset pulse t_RECon each output.

Key Features

• Dual Smart Reset push-button inputs with user-selectable extended reset setup delay (by three-state input logic): tSRC = 2, 6, 10 s (min.)
• Capacitor-adjustable reset pulse duration (tREC1 )
• Power-on reset
• Dual reset output (RST1 is active-high, push-pull type,RST2 is active-low, open-drain)
• Factory-programmable thresholds to monitor VCC in the range of 1.575 to 4.625 V typ.
• Operating voltage 1.0 V (active-low output valid) to 5.5 V
• Low supply current 3 μA
• Operating temperature: industrial grade –40 °C to +85 °C
• TDFN8 package: 2 mm x 2 mm x 0.75 mm
• RoHS compliant

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