X1B000271A00500

Real-Time Clock Module (I²C Bus) Automotive-Grade, Built-in DTCXO, High Accuracy, Integrated Power Switching

Key features

• Built-in 32.768kHz crystal unit (frequency accuracy pre-adjusted) and DTCXO
• Interface type: I²C-Bus interface (400kHz)
• Operating voltage range: 2.5V - 5.5V
• Temperature compensation voltage: 2.0V - 5.5V
• Timekeeping (backup) voltage range: 1.6V - 5.5V
• Selectable output frequency: 32.768kHz, 1024Hz, or 1Hz
• Functions include full calendar, alarm, timer, and temperature sensor
• High accuracy:
• UA ±3.4x10⁻⁶ / -40°C - +85°C (equivalent to ±9 seconds per month)
• UB ±5.0x10⁻⁶ / -40°C - +85°C (equivalent to ±13 seconds per month)
• UC ±5.0x10⁻⁶ / -30°C - +70°C (equivalent to ±13 seconds per month)
• 32.768kHz frequency output function:
• FOUT pin output (CMOS output), CL = 30pF
• Selectable output frequency: 32.768kHz, 1024Hz, or 1Hz
• Power switchover function: when VDD drops, internal supply switches to VBAT with minimal leakage current
• Timer function: timer interrupt interval configurable between 1/4096 seconds and 4095 minutes
• Alarm function: alarm setting via combination of day, hour, and minute
• Temperature sensor function: temperature data output by the temperature sensor to a register (Bank.2_Add17h)