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DS12R885 - (DS12xxx) RTC

This page provides the datasheet information for the DS12R885, a member of the DS12CR887 (DS12xxx) RTC family.

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.

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Datasheet preview – DS12R885

Datasheet Details

Part number DS12R885
Manufacturer Maxim Integrated Products
File Size 727.10 KB
Description (DS12xxx) RTC
Datasheet download datasheet DS12R885 Datasheet
Additional preview pages of the DS12R885 datasheet.

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Full PDF Text Transcription

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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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