MAX802L:微处理器监控电路

工业标准、功能完备的µP监控电路

The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (µP) systems. They significantly improve system reliability and accuracy compared to separate ICs or discrete components. These parts provide four functions: 1) A reset output during power-up, power-down, and brownout conditions. 2) Battery-backup switching for CMOS RAM, CMOS µP, or other low-power logic. 3) A reset pulse if the optional watchdog timer has not been toggled within 1.6sec. 4) A 1.25V threshold detector for power-fail warning or low-battery detection, or to monitor a power supply other than +5V. The parts differ in their reset-voltage threshold levels and reset outputs. The MAX690A/MAX802L/MAX805L generate a reset pulse when the supply voltage drops below 4.65V, and the MAX692A/MAX802M generate a reset below 4.40V. The MAX802L/MAX802M guarantee power-fail accuracies to ±2%. The MAX805L is the same as the MAX690A except that RESET is provided instead of active-low RESET. All parts are available in 8-pin DIP and SO packages. The MAX690A/MAX802L are pin compatible with the MAX690 and MAX694. The MAX692A/MAX802M are pin compatible with the MAX692.

关键特性
  • Precision Supply Voltage Monitor:
    • 4.65V for MAX690A/MAX802L/MAX805L
    • 4.40V for MAX692A/MAX802M
  • Reset Time Delay: 200ms
  • Watchdog Timer: 1.6s Timeout
  • Battery-Backup Power Switching
  • 200µA Quiescent Supply Current
  • 50nA Quiescent Supply Current in Battery-Backup Mode
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Power-Fail Accuracy Guaranteed to ±2% (MAX802L/M)
  • Guaranteed Active-Low RESET Assertion to VCC = 1V
  • 8-Pin SO and DIP Packages
MAX690A、MAX692A、MAX802L、MAX802M、MAX805L:典型工作电路
MAX690A、MAX692A、MAX802L、MAX802M、MAX805L:典型工作电路
应用
  • 电池供电计算机/控制器
  • 精确的µP监控
  • 智能仪表
数据手册DataSheet
语言下载文件备注
英文MAX690A-MAX805L.pdfRev 5; 04/2015
关键参数
Part NumberReset Thresh.
(V)
Reset OutICC
(µA)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX690A4.5 to 5.0
  • Active Low
  • Push-Pull
350
  • -55 to +125
  • -40 to +85
  • 0 to +70
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$3.88 @1k
MAX692A4.0 to 4.5
  • Active Low
  • Push-Pull
  • -55 to +125
  • -40 to +85
  • 0 to +70
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$4.37 @1k
MAX802L4.5 to 5.0
  • Active Low
  • Push-Pull
  • -40 to +85
  • 0 to +70
  • PDIP(N)/8
  • SOIC(N)/8
$4.04 @1k
MAX802M4.0 to 4.5
  • Active Low
  • Push-Pull
  • -40 to +85
  • 0 to +70
  • PDIP(N)/8
  • SOIC(N)/8
$6.22 @1k
MAX805L4.5 to 5.0
  • Active High
  • Push-Pull
  • -55 to +125
  • -40 to +85
  • 0 to +70
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$3.55 @1k
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX802LCPA停止供货MAX802LCPA+PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:否
MAX802LCPA+生产中PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:无铅
MAX802LCSA停止供货MAX802LCSA+SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:否
MAX802LCSA+生产中SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:无铅
MAX802LCSA+T生产中SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:无铅
MAX802LCSA-T停止供货MAX802LCSA+TN.SO;8引脚0°C至+70°C参考数据资料
MAX802LEPA停止供货MAX802LEPA+PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
MAX802LEPA+生产中PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:无铅
MAX802LESA停止供货MAX802LESA+SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX802LESA+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°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?
MAX802LESA+T生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX802LESA-T停止供货MAX802LESA+TN.SO;8引脚-40°C至+85°C参考数据资料
MAX690A-MAX805L.pdf MAX805L