PCF8563 RTC (Real Time Clock) Module I2C Interface 1.8 V to 5.5 V

The I2C PCF8563 RTC Module with Battery Backup is a highly accurate real-time clock solution designed for applications requiring precise timekeeping even during power outages. Based on the renowned Philips PCF8563 clock chip, this module offers exceptional stability, accuracy, and ultra-low power consumption, making it superior to alternatives like the DS1302. Ideal for hobbyists, educators, and professionals, this compact module is perfect for data loggers, alarm systems, embedded projects, and any application where maintaining accurate time is critical.

Key Features:

• Wide Operating Voltage: 1.8V to 5.5V, compatible with both 3.3V and 5V microcontroller systems.
• I2C Interface: Simple two-wire communication protocol for easy integration with Arduino, Raspberry Pi, and other development platforms.
• Battery Backup: CR1220 coin cell socket ensures timekeeping continues during main power loss (battery not included).
• Compact PCB Design: Small form factor with standard pin headers for breadboard or direct PCB mounting.
• Onboard Components: Includes pull-up resistors and supporting circuitry for plug-and-play operation.
• Yellow Pin Headers Included: Convenient header pins provided for easy connection and prototyping.
• PCF8563 Real-Time Clock IC: Industry-leading Philips/NXP chip known for superior stability and accuracy.
• Ultra-Low Power Consumption: Minimal current draw, especially in battery backup mode, extending battery life significantly.
• Century Flag and Alarm Functions: Built-in century register and programmable alarm/timer features.
• CLKOUT Frequency: Programmable clock output pin (32.768 kHz, 1024 Hz, 32 Hz, 1 Hz).
• I2C Address: Fixed I2C address (0x51) for straightforward device communication.
• Temperature Range: Operates reliably across industrial temperature ranges.
• Low Standby Current: Typically 0.25 µA in battery backup mode, ensuring years of battery operation.
• Year/Month/Day/Weekday/Hour/Minute/Second Tracking: Complete calendar and time functions with automatic leap year compensation.
• SDA and SCL Lines: Dedicated I2C data and clock lines with onboard pull-up resistor network.

Applications

• Data Logging: Timestamp sensor readings and events in environmental monitoring and industrial applications.
• Embedded Systems: Maintain accurate system time in microcontroller projects and IoT devices.
• Home Automation: Schedule tasks and control time-based functions in smart home systems.
• Educational Projects: Teach students about I2C communication, timekeeping circuits, and low-power design.
• Battery-Powered Devices: Ideal for portable equipment requiring persistent timekeeping with minimal power consumption.

Why Choose the I2C PCF8563 RTC Module with Battery Backup? The PCF8563 chip is widely recognised as one of the most stable, accurate, and power-efficient real-time clock solutions available, far outperforming older alternatives. With its wide voltage range, battery backup capability, and simple I2C interface, this module provides reliable timekeeping for virtually any embedded project. Whether you're building a data logger, an alarm system, or simply need accurate time in your next creation, this RTC module delivers professional-grade performance with hobbyist-friendly ease of use.