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STM6821：Reset + Watchdog

The STM6xxx supervisors are self-contained devices which provide microprocessor supervisory functions. A precision voltage reference and comparator monitors the V_CCinput for an out-of-tolerance condition. When an invalid V_CCcondition occurs, the reset output (RST) is forced low (or high in the case of RST). These devices also offer a watchdog timer (except for STM6322/6825) and/or a push-button (MR) reset input.

These devices are available in a standard 5-pin SOT23 package.

Key Features

• Precision VCC monitoring of 5, 3.3, 3, or 2.5 V power supplies
• RST outputs (active low, push-pull or open drain)
• RST outputs (active high, push-pull)
• Reset pulse width of 1.4 ms, 200 ms and 240 ms (typ.)
• Watchdog timeout period of 1.6 s (typ.)
• Manual reset input (MR )
• Low supply current - 3 μA (typ.)
• GuaranteedRST (RST) assertion down to VCC = 1.0 V
• Operating temperature: –40 to +85 °C (industrial grade)
• RoHS complianceLead-free components are compliant with the RoHS directive

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