3引脚微处理器复位电路

 

器件号	Replacement	Explanation

说明

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The MAX803/MAX809/MAX810 are microprocessor (µP) supervisory circuits used to monitor the 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, +3.3V, +3.0V, or +2.5V powered circuits.

These circuits perform a single function: they assert a reset signal whenever the V_CC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after V_CC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available.

The MAX803 has an open-drain output stage, while the MAX809/MAX810 have push-pull outputs. The MAX803's open-drain active-low RESET output requires a pullup resistor that can be connected to a voltage higher than V_CC. The MAX803/MAX809 have an active-low RESET output, while the MAX810 has an active-high RESET output. The reset comparator is designed to ignore fast transients on V_CC, and the outputs are guaranteed to be in the correct logic state for V_CC down to 1V.

Low supply current makes the MAX803/MAX809/MAX810 ideal for use in portable equipment. The MAX803 is available in a 3-pin SC70 package, and the MAX809/MAX810 are available in 3-pin SC70 or SOT23 packages.

MAX803L、MAX803M、MAX803R、MAX803S、MAX803T、MAX803Z、MAX809、MAX809J、MAX809L、MAX809M、MAX809R、MAX809S、MAX809T、MAX809Z、MAX810、MAX810L、MAX810M、MAX810R、MAX810S、MAX810T、MAX810Z：典型工作电路 放大+

关键特性

• Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages
• Fully Specified Over Temperature
• Available in Three Output Configurations
  • Open-Drain Active-Low RESET Output (MAX803)
  • Push-Pull Active-Low RESET Output (MAX809)
  • Push-Pull RESET Output (MAX810)
• 140ms min Power-On Reset Pulse Width
• 12µA Supply Current
• Guaranteed Reset Valid to V_CC= +1V
• Power Supply Transient Immunity
• No External Components
• 3-Pin SC70 and SOT23 Packages
• AEC-Q100 Qualified. Refer to Ordering Information for Specific /V Versions

应用

• 汽车
• 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