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DS1308 - Low-Current I2C RTC

General Description

The DS1308 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV RAM.

Address and data are transferred serially through an I2C interface.

The clock/calendar provides seconds, minutes, hours, day, date, month, and year information.

Key Features

  • Compatible with Crystal ESR Up to 100kΩ Allows a Crystal to be Optimized for Cost and Space.
  • Low-Power Operation Extends Battery Backup Run Time.
  • Low Timekeeping Current of 250nA (typ).
  • Automatic Power-Fail Detect and Switch Circuitry.
  • Completely Manages All Timekeeping Functions.
  • Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2400.
  • E.

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Full PDF Text Transcription for DS1308 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for DS1308. For precise diagrams, and layout, please refer to the original PDF.

DS1308 Low-Current I2C RTC with 56-Byte NV RAM General Description The DS1308 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar ...

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(RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV RAM. Address and data are transferred serially through an I2C interface. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator. The DS1308 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply, maintaining time and date operation.

More Datasheets from Maxim Integrated (now Analog Devices)

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