General Description

The DS3231 is a low-cost, extremely accurate I2C realtime clock (RTC) with an integrated temperature compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate time keeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3231 is available in commercial and industrial temperature ranges, and is offered in a 16-pin, 300-mil SO package.

Features

♦Accuracy ±2ppm from 0°C to +40°C

♦Accuracy ±3.5ppm from -40°C to +85°C

♦Battery Backup Input for Continuous Timekeeping

♦Operating Temperature Ranges

Commercial: 0°C to +70°C

Industrial: -40°C to +85°C

♦Low-Power Consumption

♦Real-Time Clock Counts Seconds, Minutes,Hours, Day, Date, Month, and Year with Leap Year

Compensation Valid Up to 2100

♦Two Time-of-Day Alarms

♦Programmable Square-Wave Output

♦Fast (400kHz) I2C Interface

♦3.3V Operation

♦Digital Temp Sensor Output: ±3°C Accuracy

♦Register for Aging Trim

♦RST Output/Pushbutton Reset Debounce Input

♦Underwriters Laboratories (UL) Recognized