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3V、非易失控制器,带有锂电池监测器

产品详情

主要特征

Parametric specs for Non-Volatile RAM Controllers
CE Cntrl. Yes
Smart Socket w/Int. Batt. No
Li Batt. Monitor Yes
Pwr. Fail Out Yes
RAMs Controlled 1
VSUPPLY (V) 3.3
Package/Pins SOIC (N)/8
SOIC (W)/16
TSSOP/20
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
6.89
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参量

Parametric specs for Non-Volatile RAM Controllers
CE Cntrl. Yes
Smart Socket w/Int. Batt. No
Li Batt. Monitor Yes
Pwr. Fail Out Yes
RAMs Controlled 1
VSUPPLY (V) 3.3
Package/Pins SOIC (N)/8
SOIC (W)/16
TSSOP/20
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
6.89

主要特征

  • Converts CMOS SRAM into nonvolatile memory
  • Unconditionally write-protects SRAM when VCC is out of tolerance
  • Automatically switches to battery backup supply when VCC power failure occurs
  • Monitors voltage of a lithium cell and provides advanced warning of impending battery failure
  • Signals low-battery condition on active low Battery Warning output signal
  • Automatic VCC power-fail detection for 3.0V or 3.3V power supplies
  • Space-saving 8-pin DIP and SOIC packages
  • Optional 16-pin SOIC and 20-pin TSSOP versions reset processor when power failure occurs and hold processor in reset during system power-up
  • Industrial temperature range of -40°C to +85°C

应用/用途

描述

The DS1314 Nonvolatile Controller with Battery Monitor is a CMOS circuit which solves the application problem of converting CMOS RAM into nonvolatile memory. Incoming power is monitored for an out-of-tolerance condition. When such a condition is detected, chip enable is inhibited to accomplish write protection and the battery is switched on to supply the RAM with uninterrupted power. Special circuitry uses a low-leakage CMOS process which affords precise voltage detection at extremely low battery consumption.

In addition to battery-backup support, the DS1314 performs the important function of monitoring the remaining capacity of the lithium battery and providing a warning before the battery reaches end-of-life. Because the open-circuit voltage of a lithium backup battery remains relatively constant over the majority of its life, accurate battery monitoring requires loaded-battery voltage measurement. The DS1314 performs such measurement by periodically comparing the voltage of the battery as it supports an internal resistive load with a carefully selected reference voltage. If the battery voltage falls below the reference voltage under such conditions, the battery will soon reach end-of-life. As a result, the Battery Warning pin is activated to signal the need for battery replacement.

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DS1314:功能原理框图 DS1314:功能原理框图 Zoom icon

Technical Docs

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在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心