The PCF8563 RTC Module is a low-power Real-Time Clock and Calendar module based on the NXP PCF8563 chip, featuring I2C communication and a backup battery holder for timekeeping retention.

Chipset: PCF8563 (NXP) Communication Protocol: I2C (Inter-Integrated Circuit) Operating Voltage: 3.3V - 5V DC Time Format: HH:MM:SS (24-hour format) Calendar: Year, Month, Day, Weekday Oscillator: On-chip 32.768 kHz crystal Backup Power: CR2032 battery holder (battery not included) Current Consumption: < 250nA (typical) in timekeeping mode Dimensions: 55mm x 16mm Weight: 5g Pin Count: 4 pins (VCC, GND, SDA, SCL) Operating Temperature: -40°C to +85°C

