DS3231SN#T&R

• Integrated 32.768 K Hz Temperature-Compensated Crystal Oscillator
• I2C Serial interface, One Clock Output
• 2.3 V to 5.5 V supply, 3.3 V Nominal Operating Voltage
• Date Format YY-MM-DD-dd, Time Format HH:MM:SS
• 16-Pin SOIC, Tin-Plated contacts, Surface mount, 2.65 Mm Height
• -40 C to 85 C Operating range, RoHS Compliant and Lead Free

The DS3231SN#T&R is an I2C real-time clock with an integrated 32.768 k Hz temperature-compensated crystal oscillator, offered by Analog Devices in a 16-pin SOIC package. Integrating the crystal into the RTC package removes the external tuning-fork crystal and its layout-dependent load capacitance, which is the main source of drift in a discrete RTC design. The device runs from 2.3 V to 5.5 V with a 3.3 V nominal operating supply and keeps date in YY-MM-DD-dd form and time in HH:MM:SS form. It is rated -40 C to 85 C with a 125 C maximum junction temperature.

Integrated-crystal RTCs are specified where timekeeping accuracy must hold over temperature without per-unit calibration: data loggers, energy meters, industrial controllers, medical instrumentation, telecom line cards, and any equipment that timestamps records for audit or billing. The I2C interface means the clock adds two wires to an existing sensor bus rather than dedicated pins. Buyers are typically instrumentation and industrial-controls OEMs replacing a discrete crystal-plus-RTC subcircuit. The part is in Production status and ships on tape and reel in 1, 000-piece quantities.