MAX805L

微处理器监控电路

工业标准、功能完备的µP监控电路


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说明

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.
MAX690A、MAX692A、MAX802L、MAX802M、MAX805L:典型工作电路 MAX690A、MAX692A、MAX802L、MAX802M、MAX805L:典型工作电路 放大+

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

应用

  • 电池供电计算机/控制器
  • 精确的µP监控
  • 智能仪表

请查看具体的参数规格 Battery Backup Circuits (80)


Part NumberReset Thresh.
(V)
Reset OutICC
(µA)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX690A 4.5 to 5.0
Active Low
Push-Pull
350
-55 to +125
-40 to +85
0 to +70
CDIP/8
PDIP/8
SOIC (N)/8
$4.07 @1k
MAX692A 4.0 to 4.5
Active Low
Push-Pull
-55 to +125
-40 to +85
0 to +70
CDIP/8
DICE SALES
PDIP/8
SOIC (N)/8
$4.59 @1k
MAX802L 4.5 to 5.0
Active Low
Push-Pull
-40 to +85
0 to +70
PDIP/8
SOIC (N)/8
$4.24 @1k
MAX802M 4.0 to 4.5
Active Low
Push-Pull
-40 to +85
0 to +70
PDIP/8
SOIC (N)/8
$6.53 @1k
MAX805L 4.5 to 5.0
Active High
Push-Pull
-55 to +125
-40 to +85
0 to +70
CDIP/8
PDIP/8
SOIC (N)/8
$3.73 @1k

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。
申请可靠性报告: MAX805L 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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