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DS1312 - Nonvolatile Controller

General Description

VCCI VCCO VBAT - +5V Power Supply Input - SRAM Power Supply Output - Backup Battery Input CEI - Chip Enable Input CEO TOL BW - Chip Enable Output - VCC Tolerance Select - Battery Warning Output (Open Drain) RST GND NC - Reset Output (Open Drain) - Ground - No Connection DESCRIPTION The DS131

Key Features

  • 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 S.

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Other Datasheets by Maxim Integrated (now Analog Devices)

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DS1314 3V Nonvolatile Controller
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DS1305 Serial Alarm Real-Time Clock

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-6306; Rev 6/12 ` DS1312 Nonvolatile Controller with Lithium Battery Monitor FEATURES  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 PIN ASSIGNMENT VCCO VBAT TOL GND 1 2 3 4 8 VCCI 7 BW 6 CEO 5 CEI