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DS1315 - Phantom Time

General Description

The DS1315 Phantom Time Chip is a combination of a CMOS timekeeper and a nonvolatile memory controller.

In the absence of power, an external battery maintains the timekeeping operation and provides power for a CMOS static RAM.

Key Features

  • Real-Time Clock Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years.
  • Automatic Leap Year Correction Valid Up to 2100.
  • No Address Space Required to Communicate with RTC.
  • Provides Nonvolatile Controller Functions for Battery Backup of SRAM.
  • Supports Redundant Battery Attachment for High-Reliability.

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Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
DS1312 Nonvolatile Controller
DS1314 3V Nonvolatile Controller
DS1318 Parallel-Interface Elapsed Time Counter
DS1302 Trickle-Charge Timekeeping Chip
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.

View original datasheet text
19-6080; Rev 11/11 www.dalsemi.com DESCRIPTION The DS1315 Phantom Time Chip is a combination of a CMOS timekeeper and a nonvolatile memory controller. In the absence of power, an external battery maintains the timekeeping operation and provides power for a CMOS static RAM. The watch keeps track of hundredths of seconds, seconds, minutes, hours, day, date, month, and year information. The last day of the month is automatically adjusted for months with fewer than 31 days, including leap year correction. The watch operates in one of two formats: a 12-hour mode with an AM/PM indicator or a 24-hour mode. The nonvolatile controller supplies all the necessary support circuitry to convert a CMOS RAM to a nonvolatile memory.