DS1643

非易失时钟RAM

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产品详情

Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lithium Energy Source
Clock Registers are Accessed Identically to the Static RAM. These Registers Reside in the Eight Top RAM Locations
Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power
Access Times of 85ns and 100ns
BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Leap Year Compensation Valid Up to 2100
Power-Fail Write Protection Allows for ±10% V_CC Power Supply Tolerance
Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
DS1643 Only (DIP Module)
- Standard JEDEC Byte-Wide 8K x 8 RAM Pinout
- DS1643P Only (PowerCap Module Board)
  - Surface Mountable Package for Direct Connection to PowerCap Containing Battery and Crystal
  - Replaceable Battery (PowerCap)
  - Power-Fail Output
  - Pin-for-Pin Compatible with Other Densities of DS164XP Timekeeping RAM

这是最新版本的数据手册

部分模型	产品周期	描述
非易失性计时RAM 1
DS9034PCX		PowerCap，带有晶振