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DS1672 - I2C 32-Bit Binary Counter RTC

Description

The DS1672 incorporates a 32-bit counter and power-monitoring functions.

The 32-bit counter is designed to count seconds and can be used to derive time-of-day, week, month, month, and year by using a software algorithm.

Features

  • 32-Bit Counter.
  • I2C Serial Interface.
  • Automatic Power-Fail Detect and Switch Circuitry.
  • Power-Fail Reset Output.
  • Low-Voltage Oscillator Operation (1.3V min).
  • Trickle-Charge Capability.
  • Underwriters Laboratories (UL) Recognized.
  • -40°C to +85°C Ope.

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Full PDF Text Transcription

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19-6032; Rev 9/11 DS1672 I2C 32-Bit Binary Counter RTC GENERAL DESCRIPTION The DS1672 incorporates a 32-bit counter and power-monitoring functions. The 32-bit counter is designed to count seconds and can be used to derive time-of-day, week, month, month, and year by using a software algorithm. A precision, temperature-compensated reference and comparator circuit monitors the status of VCC. When an out-of-tolerance condition occurs, an internal power-fail signal is generated that forces the reset to the active state. When VCC returns to an in-tolerance condition, the reset signal is kept in the active state for a period of time to allow the power supply and processor to stabilize.
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