STM819MM6F

STM819 系列 4.4 V 200 ms 表面贴装 监控器 带电池切换 - SOIC-8

The STM690A/692A/703/704/802/805/817/818/819 supervisors are self-contained devices which provide microprocessor supervisory functions with the ability to non-volatize and write-protect external LPSRAM. A precision voltage reference and comparator monitors the VCCinput for an out-of-tolerance condition. When an invalid VCCcondition occurs, the reset output RST is forced low or high in the case of RST. These devices also offer a watchdog timer except for STM703/704/819 as well as a power-fail comparator except for STM818 to provide the system with an early warning of impending power failure.

These devices are available in a standard 8-pin SOIC package or a space-saving 8-pin TSSOP package.

**Key Features**

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5 V operating voltage

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NVRAM supervisor for external LPSRAM

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Chip-enable gating STM818 only for external LPSRAM 7 ns max prop delay

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RST andRST outputs

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200 ms typ trec

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Watchdog timer - 1.6 sec typ

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Automatic battery switchover

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Low battery supply current - 0.4 μA typ

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Power-fail comparator PFI/PFO

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Low supply current - 40 μA typ

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GuaranteedRST RST assertion down to VCC = 1.0 V

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Operating temperature: –40 °C to +85 °C industrial grade

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RoHS compliance

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Lead-free components are compliant with the RoHS directive