General Description

The DS3234 is a low-cost, extremely accurate SPI bus real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The DS3234 incorporates a precision, temperature-compensated voltage reference and comparator circuit to monitor VCC.

Benefits and Features

• Highly Accurate RTC with Integrated Crystal and

   SRAM Completely Manages All Timekeeping

   Functions

   • Accuracy ±2ppm from 0°C to +40°C

   • Accuracy ±3.5ppm from -40°C to +85°C

   • Real-Time Clock Counts Seconds, Minutes, Hours,

      Day, Date, Month, and Year, with Leap Year

      Compensation Valid Up to 2099

   • Digital Temp Sensor Output: ±3°C Accuracy

   • Register for Aging Trim

   • RST Input/Output

   • Two Time-of-Day Alarms

   • Programmable Square-Wave Output

• Simple Serial Interface Connects to Most

   Microcontrollers

   • 4MHz SPI Bus Supports Modes 1 and 3

• Battery-Backup Input for Continuous Timekeeping

   • Low Power Operation Extends Battery Backup Run

      Time

• Operating Temperature Ranges: Commercial: 0°C to

   +70°C, Industrial: -40°C to +85°C

• 300-Mil, 20-Pin SO Package

• Underwriters Laboratories® (UL) Recognized

Applications

   Servers

   Utility Power Meters

   Telematics

   GPS