MAX822:4引脚、微处理器电压监测器,引脚可设置上电复位超时周期

4引脚SOT复位IC,可选择复位超时延迟周期

The MAX821/MAX822 microprocessor (µP) supervisory circuits 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 MAX821/MAX822 also provide a power-on reset timeout delay that is pin selectable to 1ms (max), 20ms (min), or 100ms (min). These devices perform a single function: they assert a reset signal whenever the VCC supply voltage falls below a preset threshold, and they keep reset asserted for the pin-selected reset timeout delay after VCC has risen above the reset threshold. The only difference between the two devices is that the MAX821 has an active-low RESET output (which is guaranteed to be in the correct state for VCC down to 1V), while the MAX822 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC. Reset thresholds suitable for operation with a variety of supply voltages are available. Low supply current makes the MAX821/MAX822 ideal for use in portable equipment. These devices come in a 4-pin SOT143 package.

关键特性
  • Pin-Selectable, Precision Power-On Reset Delay: 1ms (max), 20ms (min), or 100ms (min)
  • Precision Monitoring of +3V to +5V Power-Supply Voltages
  • 2.5µA Supply Current
  • Guaranteed Over Temperature (-40°C to +125°C)
  • Guaranteed Active-Low RESET Valid to VCC = 1V (MAX821)
  • Power-Supply Transient Immunity
  • No External Components
  • SOT143 Package
MAX821、MAX821L、MAX821M、MAX821P、MAX821R、MAX821S、MAX821T、MAX821U、MAX822、MAX822L、MAX822M、MAX822R、MAX822S、MAX822T:典型工作电路
MAX821、MAX821L、MAX821M、MAX821P、MAX821R、MAX821S、MAX821T、MAX821U、MAX822、MAX822L、MAX822M、MAX822R、MAX822S、MAX822T:典型工作电路
应用
  • 条码扫描仪
  • 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
数据手册DataSheet
语言下载文件备注
英文MAX821-MAX822T.pdfRev 3; 03/2006
关键参数
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX821
  • 2.5 to 3.3
  • 3.3 to 5.5
  • Active Low
  • Push-Pull
  • 15ms to 85ms
  • 85ms to 300ms
  • <1ms
  • Adjustable
No Watchdog1.57SOT/4$1.31 @1k
MAX822
  • Active High
  • Push-Pull
SOT/4$1.36 @1k
相关产品
  • MAX6332:3引脚、超低电压、低功耗、微处理器复位电路
  • MAX6334:3引脚、超低电压、低功耗、微处理器复位电路
  • MAX6333:3引脚、超低电压、低功耗、微处理器复位电路
  • MAX6335:4引脚、超低电压、低功耗、微处理器复位电路,带有手动复位
  • MAX6336:4引脚、超低电压、低功耗、微处理器复位电路,带有手动复位
  • MAX6337:4引脚、超低电压、低功耗、微处理器复位电路,带有手动复位
  • MAX6315:漏极开路输出、SOT封装的微处理器复位电路
  • MAX6314:68HC11/双向微处理器复位电路
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX822LUS+生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
MAX822LUS+T生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
MAX822LUS-T停止供货MAX822LUS+TSOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:否
MAX822MUS+生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
MAX822MUS+T生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
MAX822MUS-T停止供货MAX822MUS+TSOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:否
MAX822RUS+生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
MAX822RUS+T生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
MAX822RUS-T停止供货MAX822RUS+TSOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:否
MAX822SUS+生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX822SUS+T生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
MAX822SUS-T停止供货MAX822SUS+TSOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:否
MAX822TUS+生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
MAX822TUS+T生产中SOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:无铅
MAX822TUS-T停止供货MAX822TUS+TSOT,;4引脚;8mm²-40°C至+125°CRoHS/无铅:否
MAX821-MAX822T.pdf MAX822
MAX821-MAX822T.pdf MAX821T