DS1321 - 灵活的非易失控制器，带有锂电池

DS1321是Maxim美信半导体公司的一款存储器产品，DS1321是灵活的非易失控制器，带有锂电池，本站介绍了DS1321的封装应用图解、特点和优点、功能等，并给出了与DS1321相关的Maxim元器件型号供参考。

DS1321 - 灵活的非易失控制器，带有锂电池 - 存储器 - Maxim美信半导体高性能芯片品质 - 美信半导体

产品概述

The DS1321 Flexible Nonvolatile Controller with Lithium Battery Monitor is a CMOS circuit which solves the application problem of converting CMOS SRAMs into nonvolatile memory. Incoming power is monitored for an out-of-tolerance condition. When such a condition is detected, chip enable outputs are inhibited to accomplish write protection and the battery is switched on to supply the SRAMs with uninterrupted power. Special circuitry uses a low-leakage CMOS process which affords precise voltage detection at extremely low battery consumption. One DS1321 can support as many as four SRAMs arranged in any of three memory configurations.

In addition to battery-backup support, the DS1321 performs the important function of monitoring theremaining 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 DS1321 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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