DS1312:非易失控制器,带有锂电池监测器

The DS1312 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 DS1312 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 DS1312 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.

关键特性
  • 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
  • Optional 5% or 10% power-fail detection
  • 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
DS1312:功能原理框图
DS1312:功能原理框图
数据手册DataSheet
语言下载文件备注
英文DS1312.pdfRev 3; 07/2012
关键参数
Part NumberCE Cntrl.Smart Socket w/Int. Batt.Li Batt. MonitorPwr. Fail OutRAMs ControlledVSUPPLY
(V)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
See Notes
DS1312YesNoYesYes15
  • PDIP(N)/8
  • SOIC(N)/8
  • SOIC(W)/16
  • TSSOP/20
-40 to +85$6.29 @1k
技术资料
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
DS1312停止供货DS1312+PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:否
DS1312+生产中PDIP(N),;8引脚;79.7mm²-40°C至+85°CRoHS/无铅:无铅
DS1312E停止供货DS1312E+TSSOP,;20引脚;45.2mm²-40°C至+85°CRoHS/无铅:否
DS1312E+生产中TSSOP,;20引脚;45.2mm²-40°C至+85°CRoHS/无铅:无铅
DS1312E+T&R生产中TSSOP,;20引脚;45.2mm²-40°C至+85°CRoHS/无铅:无铅
DS1312E/T&R停止供货DS1312E+T&RTSSOP,;20引脚;45.2mm²-40°C至+85°CRoHS/无铅:否
DS1312S停止供货DS1312S+SOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:否
DS1312S+生产中SOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:无铅
DS1312S+T&R生产中SOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:无铅
DS1312S-2停止供货DS1312S-2+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?
DS1312S-2+生产中SOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
DS1312S-2/T&R停止供货DS1312S-2+T&RSOIC(N),;8引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
DS1312S/T&R停止供货DS1312S+T&RSOIC(W),;16引脚;111.8mm²-40°C至+85°CRoHS/无铅:否
DS1312.pdf DS1312
DS1312.pdf DS1312
DS1312.pdf DS1312
Battery Monitoring in NV SRAM Modules DS1350Y
NV SRAM Frequently Asked Questions DS1350Y
DS1312.pdf DS1312
DS1312.pdf DS1312