DS3231S#

The DS3231S# is an extremely accurate I²C Real-time Clock (RTC) with an integrated temperature compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input and maintains accurate timekeeping 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 RTC maintains seconds, minutes, hours, day, date, month and year information. The date at the end of the month 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. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially through an I²C bidirectional bus.

• Highly accurate RTC completely manages all timekeeping functions
• ±3°C Accuracy digital temperature sensor output
• Register for aging trim
• Active-low RST output/pushbutton reset debounce input
• Programmable square-wave output signal
• Simple serial interface connects to most microcontrollers
• Battery-backup input for continuous timekeeping
• Underwriters Laboratories® (UL) recognized

Applications

Communications & Networking, Metering, Sensing & Instrumentation

Warnings

Negative undershoots below -0.3V while the part is in battery-backed mode may cause loss of data. Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party