MAX706S:监视+3V电压、低成本、微处理器监控电路

The MAX706P/R/S/T, MAX706AP/AR/AS/AT, and MAX708R/S/T microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor +3V power-supply levels in +3V to +5V µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX706P/R/S/T and MAX706AP/AR/AS/AT supervisory circuits provide the following four functions: 1) A reset output during power-up, power-down, and brownout conditions. 2) An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6s. 3) A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than the main supply. 4) An active-low, manual-reset input. The only difference between the MAX706R/AR, MAX706S/AS, and MAX706T/AT is the reset-threshold voltage levels, which are 2.63V, 2.93V, and 3.08V, respectively. All have active-low reset output signals. The MAX706P/AP are identical to the MAX706R/AR, except the reset output signal is active-high. The watchdog timer function for the MAX706AP/AR/AS/AT disables when the WDI input is left open or connected to a high-impedance state of a low-leakage tri-state output. The MAX708R/S/T provide the same functions as the MAX706R/S/T and MAX706AR/AS/AT except they do not have a watchdog timer. Instead, they provide both active-low RESET and RESET outputs. As with the MAX706, devices with R, S, and T suffixes have reset thresholds of 2.63V, 2.93V, and 3.08V, respectively. These devices are available in 8-pin SO, DIP, and µMAX® packages and are fully specified over the operating temperature range.

关键特性
  • µMAX Package, Small 8-Pin SO
  • Precision Supply-Voltage Monitors
    • 2.63V (MAX706P/R, MAX706AP/AR, and MAX708R)
    • 2.93V (MAX706S, MAX706AS, and MAX708S)
    • 3.08V (MAX706T, MAX706AT, and MAX708T)
  • 200ms Reset Time Delay
  • Debounced TTL/CMOS-Compatible Manual Reset Input
  • 100µA Quiescent Current
  • WDI Disable Feature (MAX706AP/AR/AS/AT)
  • Watchdog Timer: 1.6s Timeout
  • Reset Output Signal:
    • Active-High Only (MAX706P, MAX706AP)
    • Active-Low Only (MAX706R/S/T, MAX706AR/AS/AT)
    • Active-High and Active-Low (MAX708R/S/T)
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • 8-Pin Surface-Mount Package
  • Guaranteed active-low RESET Assertion to VCC = 1V
MAX706AP、MAX706AR、MAX706AS、MAX706AT、MAX706P、MAX706R、MAX706S、MAX706T、MAX708R、MAX708S、MAX708T:引脚配置
MAX706AP、MAX706AR、MAX706AS、MAX706AT、MAX706P、MAX706R、MAX706S、MAX706T、MAX708R、MAX708S、MAX708T:引脚配置
应用
  • 电池供电设备
  • 计算机
  • 控制器
  • 精确的µP电源监控
  • 智能仪表
  • 便携式仪表
数据手册DataSheet
语言下载文件备注
英文MAX706AP-MAX708T.pdfRev 5; 05/2006
关键参数
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureWatchdog TimeoutSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX706P2.5 to 3.3
  • Active High
  • Push-Pull
85ms to 300ms
  • Input (WDI)
  • Input/Output (WDI/WDO)
1s to 2s
  • Adjustable Reset Input
  • Manual Reset
  • Power Fail Comparator/Low Battery Detect
2.5200
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$1.82 @1k
MAX706R
  • Active Low
  • Push-Pull
  • Input (WDI)
  • Input/Output (WDI/WDO)
1s to 2s
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$1.77 @1k
MAX706S
  • Active Low
  • Push-Pull
  • Input (WDI)
  • Input/Output (WDI/WDO)
1s to 2s
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$1.77 @1k
MAX706T
  • Active Low
  • Push-Pull
  • Input (WDI)
  • Input/Output (WDI/WDO)
1s to 2s
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$1.77 @1k
MAX708R
  • Active High
  • Active Low
  • Push-Pull
No Watchdog-
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$2.01 @1k
MAX708S
  • Active High
  • Active Low
  • Push-Pull
No Watchdog-
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$3.01 @1k
MAX708T
  • Active High
  • Active Low
  • Push-Pull
No Watchdog-
  • µMAX/8
  • CDIP(N)/8
  • PDIP(N)/8
  • SOIC(N)/8
$2.58 @1k
质量和环境数据
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订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX706SC/D停止供货参考数据资料
MAX706SCPA停止供货PDIP(N),;8引脚;79.7mm²0°C至+70°CRoHS/无铅:否
MAX706SCSA停止供货MAX706SCSA+SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:否
MAX706SCSA+生产中SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:无铅
MAX706SCSA+T生产中SOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:无铅
MAX706SCSA-T停止供货MAX706SCSA+TSOIC(N),;8引脚;30.9mm²0°C至+70°CRoHS/无铅:否
MAX706SCUA+生产中µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:无铅
MAX706SCUA+T生产中µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:无铅
MAX706SEPA停止供货PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
MAX706SESA停止供货MAX706SESA+SOIC(N),;8引脚;30.9mm²-40°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?
MAX706SESA+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX706SESA+T生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX706SESA-T停止供货MAX706SESA+TSOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX706SEUA+生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX706SEUA+T生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX706SMJA生产中CDIP(N),;8引脚;82.6mm²-55°C至+125°CRoHS/无铅:否
MAX706AP-MAX708T.pdf MAX708T
MAX706S.pdf MAX706S
MAX706AP-MAX708T.pdf MAX706AP