RTC DS3231

DS3231 Real-Time Clock – Precision, Low-Power, I²C‑Ready

The DS3231 is a highly accurate integrated real‑time clock (RTC) featuring an integrated temperature‑compensated crystal oscillator (TCXO) for drift less than ±2 ppm. Designed for ultra‑low power operation (< 2 µA standby), it delivers reliable timekeeping even in battery‑powered or intermittently powered devices. The I²C interface with an optional 32 kHz output and battery‑backed backup ensures data integrity during power loss.

• Key Spec 1: Accuracy – ±2 ppm (±5 ppm at –40 °C to +85 °C)
• Key Spec 2: Power – 0.6 µA standby; < 300 µA active (VDD 1.71 V to 5.5 V)
• Key Spec 3: Interface – I²C (2‑line) with 7‑bit address, 32 kHz output
• Common Use Case: Embedded controllers and IoT devices requiring accurate timestamping, sleep scheduling, or event logging without frequent calibration.