MAX819L, MAX819M

+5V微处理器监控电路

低功耗、小尺寸、微处理器监控电路,带有备份电池切换


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说明

The MAX817/MAX818/MAX819 microprocessor (µP) supervisory circuits simplify power-supply monitoring, battery control, and chip-enable gating in µP systems by reducing the number of components required. These devices are designed for use in +5V-powered systems. Low supply current (11µA typical) and small package size make these devices ideal for portable applications. The MAX817/MAX818/MAX819 are specifically designed to ignore fast transients on VCC. Other supervisory functions include active-low reset, backup-battery switchover, watchdog input, battery freshness seal, and chip-enable gating. The Selector Guide in the full data sheet lists the specific functions available from each device.

These devices offer two pretrimmed reset threshold voltages for ±5% or ±10% power supplies: 4.65V for the L versions and 4.40V for the M versions. The MAX817/ MAX818/MAX819 are available in space-saving µMAX® packages, as well as 8-pin DIP/SO.
MAX817L、MAX817M、MAX818L、MAX818M、MAX819L、MAX819M:典型工作电路 MAX817L、MAX817M、MAX818L、MAX818M、MAX819L、MAX819M:典型工作电路 放大+

关键特性

  • Precision Supply-Voltage Monitor:
    • 4.65V (MAX81_L)
    • 4.40V (MAX81_M)
  • 11µA Quiescent Supply Current
  • 200ms Reset Time Delay
  • Watchdog Timer with 1.6sec Timeout (MAX817/MAX818)
  • Battery-Backup Power Switching; Battery Voltage Can Exceed VCC
  • Battery Freshness Seal
  • On-Board, 3ns Gating of Chip-Enable Signals (MAX818)
  • Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning (MAX817/MAX819)
  • Manual Reset Input (MAX819)

应用

  • 电池供电计算机/控制器
  • 精确的µP监控
  • 嵌入式控制器
  • 智能仪表
  • 便携式设备

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
(max)(See Notes)
MAX817 3.3 to 5.5
Active Low
Push-Pull
60
-40 to +85
0 to +70
PDIP/8
SOIC (N)/8
UMAX/8
$2.90 @1k
MAX818 45
PDIP/8
SOIC (N)/8
UMAX/8
$3.44 @1k
MAX819 45
PDIP/8
SOIC (N)/8
UMAX/8
$3.06 @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。
产品可靠性报告: MAX819L.pdf 
申请可靠性报告: MAX819M 
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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