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DS12C887 - Real Time Clock

Description

The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287.

Features

  • Drop-In Replacement for IBM AT Computer Clock/Calendar.
  • RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Through 2099.
  • Binary or BCD Time Representation.
  • 12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode.
  • Daylight Saving Time Option.
  • Selectable Intel or Motorola Bus Timing.
  • Interfaced with Software as 128 RAM Locations.
  • 14 Bytes of Clock and Control Registers.
  • 114 Byt.

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Other Datasheets by Maxim Integrated (Analog Devices)

Part Number Description
DS12C887A Real Time Clock
DS12CR887 (DS12xxx) RTC
DS1249W 3.3V 2048kb Nonvolatile SRAM
DS1265AB 8M Nonvolatile SRAM
DS1265Y 8M Nonvolatile SRAM

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
Rev 0; 6/05 Real-Time Clock General Description The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287. The devices provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of batterybacked static RAM (113 bytes in the DS12C887 and DS12C887A). The DS12887 integrates a quartz crystal and lithium energy source into a 24-pin encapsulated DIP package. The DS12C887 adds a century byte at address 32h. For all devices, the date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years.
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