DS1321

Flexible Nonvolatile Controller with Lithium Battery

Data Sheet (Rev. 3) Product Selection Table
Part Models
4
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Starting From $6.89
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Part Details

  • 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
  • Flexible memory organization
    • Mode 0: 4 banks with 1 SRAM each
    • Mode 1: 2 banks with 2 SRAMs each
    • Mode 2: 1 bank with 4 SRAMs each
  • 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
  • Resets processor when power failure occurs and holds processor in reset during system power-up
  • Optional 5% or 10% power-fail detection
  • 16-pin PDIP, 16-pin SO and 20-pin TSSOP packages
  • Industrial temperature range of -40°C to +85°C
DS1321
Flexible Nonvolatile Controller with Lithium Battery
DS1321: Functional Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 2

Technical Articles 1

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