I²C, 32-Bit, Binary Counter Clock with 64-Bit ID

Ideal Clock for Portable Media Players

Please check latest availability status for a specific part variant.


The DS1372 is a 32-bit binary up counter and 24-bit down counter with a unique 64-bit ID. The counters, ID, configuration, and status registers are accessed using an I²C serial interface. The DS1372 includes a SQW/active-low INT open-drain output that can output either a square wave at one of four predefined frequencies, or it can output an active-low signal when the 24-bit down counter reaches 0.
DS1372: Typical Operating Circuit DS1372: Typical Operating Circuit Enlarge+

Key Features

  • Compliant with Microsoft Windows Media® DRM 10 for Portable Devices
  • 32-Bit Binary Counter
  • Programmable Alarm
  • 64-Bit Factory-Programmed ID
  • Interrupt Output
  • I²C Serial Interface
  • Two Selectable I²C Addresses
  • 2.4V to 5.5V Operating Voltage Range
  • 1.3V to 5.5V Timekeeping Operating Range
  • -40°C to +85°C Operating Temperature Range
  • 8-Pin µSOP


  • Portable Audio and Video Players
Part NumberInterfaceVSUPPLY
Time Keeping Current
Memory TypeTime of Day AlarmsFunctionsPackage/PinsBudgetary
typSee Notes
DS1372 I2C
Elapsed Time Counter
Watchdog Timekeeper
$1.26 @1k
See All Timekeeping & Real-Time Clocks (77)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

Tutorial 5791 Tips for Writing Bulletproof Real-Time Clock Control Code
App Note 58 Crystal Considerations with Maxim Real-Time Clocks (RTCs)

Quality and Environmental Data

Product Reliability Reports: DS1372.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • DS1372U+
  • DS1372U+T&R
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >


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