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DS12R887 - (DS12xxx) RTC

Download the DS12R887 datasheet PDF. This datasheet also covers the DS12CR887 variant, as both devices belong to the same (ds12xxx) rtc family and are provided as variant models within a single manufacturer datasheet.

Description

The DS12R885 is a functional drop-in replacement for the DS12885 real-time clock (RTC).

The device provides an RTC/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.

Features

  • Trickle-Charge Capability for a Rechargeable Battery or Super Cap.
  • Selectable Intel or Motorola Bus Timing.
  • RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap-Year Compensation to 2100.
  • Interrupt Output with Three Independently Maskable Interrupt Flags.
  • Time-of-Day Alarm is Once-per-Second to Onceper-Day.
  • Periodic Rates from 122µs to 500ms.
  • End-of-Clock Update Cycle Flag.
  • 14 Bytes of Clock and Control.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (DS12CR887_MaximIntegratedProducts.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Maxim Integrated (Analog Devices)

Part Number Description
DS12R885 (DS12xxx) RTC
DS1249W 3.3V 2048kb Nonvolatile SRAM
DS1265AB 8M Nonvolatile SRAM
DS1265Y 8M Nonvolatile SRAM
DS12885 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
Rev 2; 12/04 RTC with Constant-Voltage Trickle Charger General Description The DS12R885 is a functional drop-in replacement for the DS12885 real-time clock (RTC). The device provides an RTC/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. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years. It also operates in either 24-hour or 12-hour format with an AM/PM indicator. A precision temperature-compensated circuit monitors the status of VCC. If a primary power failure is detected, the device automatically switches to a backup supply.
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