DS1553

64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM

Part Details

  • Integrated NV SRAM, RTC, Crystal, Power-Fail Control Circuit, and Lithium Energy Source
  • Clock Registers are Accessed Identically to the Static RAM; These Registers are Resident in the 16 Top RAM Locations
  • Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power
  • Precision Power-On Reset
  • Programmable Watchdog Timer and RTC Alarm
  • BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap Year Compensation Valid Up to the Year 2100
  • Battery Voltage Level Indicator Flag
  • Power-Fail Write Protection Allows for ±10% VCC Power-Supply Tolerance
  • Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
DS1553
64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
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Hardware Ecosystem

Parts Product Life Cycle Description
DS9034PCX RECOMMENDED FOR NEW DESIGNS PowerCap with Crystal
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