DS1249W

3.3V 2048kb Nonvolatile SRAM

Data Sheet (Rev. 3)
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Overview

  • 10 years minimum data retention in the absence of external power
  • Data is automatically protected during power loss
  • Unlimited write cycles
  • Low-power CMOS operation
  • Read and write access times of 100ns
  • Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
  • Optional industrial (IND) temperature range of -40°C to +85°C
  • JEDEC standard 32-pin DIP package

    • The DS1249W 2048kb nonvolatile (NV) SRAMs are 2,097,152-bit, fully static, NV SRAMs organized as 262,144 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry that constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent data corruption. There is no limit on the number of write cycles that can be executed, and no additional support circuitry is required for microprocessor interfacing.

    Applications

    • Automated Test Equipment (ATE)
    • Automatic Utility Meter Reading
    • Building Energy Management (HVAC)
    • Cable Modems
    • Computers: Desktop, Workstation, Server
    • Digital Television (Receivers, Set-Top Boxes)
    • Modems (Analog, ISDN, DSL)
    • Network Hubs, Switches, Routers
    • Notebook Computers
    • Oscilloscopes
    • Printers and Faxes
    • Programmable Logic Controllers
    • Storage Systems
    • Test and Measurement Equipment
    DS1249W
    3.3V 2048kb Nonvolatile SRAM
    DS1249W: Pin Assignment
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    Documentation

    Data Sheet 1

    Reliability Data 1

    Design Note 3

    Technical Articles 1

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    Hardware Ecosystem

    Parts Product Life Cycle Description
    Memory & Data Loggers 7
    DS1249Y
    		RECOMMENDED FOR NEW DESIGNS 2048k Nonvolatile SRAM
    DS1249AB
    		RECOMMENDED FOR NEW DESIGNS 2048k Nonvolatile SRAM
    DS1230W
    		PRODUCTION 3.3V 256k Nonvolatile SRAM
    DS1245W
    		PRODUCTION 3.3V 1024k Nonvolatile SRAM
    DS1250W
    		PRODUCTION 3.3V 4096k Nonvolatile SRAM
    DS1265W
    		3.3V 8Mb Nonvolatile SRAM
    DS1270W
    		3.3V 16Mb Nonvolatile SRAM
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