MAX699:低成本、上电复位与看门狗控制器

The MAX698/MAX699 monitor the +5V supply in microprocessor (µP) and digital systems. They supply a active-low RESET pulse of at least 140ms duration on power-up, power-down, and during low-voltage brownout conditions. Circuit reliability is increased at reduced cost by eliminating all external components and adjustments. The MAX699 includes all features of the MAX698, but also provides a watchdog input to monitor microprocessor activity. The active-low RESET output goes low if the watchdog input (WDI) is not toggled within 1 second. The watchdog feature can be disabled by leaving WDI open. Both parts are supplied in 8-lead PDIP and 16-lead 0.3in wide small outline (SO) packages and are specified from 0°C to +70°C for C grade devices and -40°C to +85°C for E devices. The SO versions, with more pins than the 8-lead PDIP, have additional outputs not available in DIP packages. These are RESET (without inversion) and watchdog output (active-low WDO).

关键特性
  • Precision Voltage Monitor
  • Power-OK/Reset Time Delay
  • Watchdog Timer
  • Minimum Component Count
MAX698、MAX699:典型工作电路
MAX698、MAX699:典型工作电路
应用
  • 计算机
  • 控制器
  • 精确的µP电源监控
  • 智能仪表
数据手册DataSheet
语言下载文件备注
英文MAX698-MAX699.pdfRev 5; 11/2014
关键参数
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureWatchdog TimeoutReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX6983.3 to 5.5
  • Active High
  • Active Low
  • Open Drain
  • Push-Pull
85ms to 300msNo Watchdog-2.55000
  • PDIP(N)/8
  • SOIC(W)/16
$2.33 @1k
MAX699
  • Input (WDI)
  • Input/Output (WDI/WDO)
1s to 2s
  • PDIP(N)/8
  • SOIC(W)/16
$2.23 @1k
相关产品
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  • MAX6320:5引脚微处理器监控电路,带有看门狗定时及手动复位
  • MAX6316:5引脚微处理器监控电路,带有看门狗定时及手动复位
  • MAX6321:5引脚微处理器监控电路,带有看门狗定时及手动复位
  • MAX6322:5引脚微处理器监控电路,带有看门狗定时及手动复位
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX699CPA停止供货MAX699CPA+PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:否
MAX699CPA+生产中PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:无铅
MAX699CWE生产中SOIC(W),;16引脚;111.8mm²0°C至+70°CRoHS/无铅:否
MAX699CWE+生产中SOIC(W),;16引脚;111.8mm²0°C至+70°CRoHS/无铅:无铅
MAX699CWE+T生产中SOIC(W),;16引脚;111.8mm²0°C至+70°CRoHS/无铅:无铅
MAX699CWE-T停止供货MAX699CWE+TW.SO;16引脚0°C至+70°C参考数据资料
MAX699EPA停止供货MAX699EPA+PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
MAX699EPA+生产中PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:无铅
MAX699EPA-4生产中MAX699EPAPDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
MAX699EWE停止供货MAX699EWE+SOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:否
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?
MAX699EWE+生产中SOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:无铅
MAX699EWE+T生产中SOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:无铅
MAX699EWE-T停止供货MAX699EWE+TW.SO;16引脚-40°C至+85°C参考数据资料
MAX698-MAX699.pdf MAX699
MAX698-MAX699.pdf MAX699