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完整的数据资料 (PDF, 192kB) 英文 下载 The MAX811/MAX812 are low-power microprocessor (µP) supervisory circuits used to monitor power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V- powered or 3V-powered circuits. The MAX811/MAX812 also provide a debounced manual reset input. These devices perform a single function: They assert a reset signal whenever the VCC supply voltage falls below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. The only difference between the two devices is that the MAX811 has an active-low RESET output (which is guaranteed to be in the correct state for VCC down to 1V), while the MAX812 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC. Reset thresholds are available for operation with a variety of supply voltages. Low supply current makes the MAX811/MAX812 ideal for use in portable equipment. The devices come in a 4-pin SOT143 package.

关键特性		应用/使用
Precision Monitoring of 3V, 3.3V, and 5V Power-Supply Voltages 6µA Supply Current 140ms Min Power-On Reset Pulse Width; active-low RESET Output (MAX811), RESET Output (MAX812) Guaranteed Over Temperature Guaranteed active-low RESET Valid to VCC = 1V (MAX811) Power-Supply Transient Immunity No External Components 4-Pin SOT143 Package		计算机：台式机、工作站和服务器 控制器 精确的µP与µC电源监控 智能仪表 便携式电池供电设备

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