PCF8563T/5,518 – Real Time Clock Binary I2C IC SOIC-8

Resources:
Datasheet
Low Power I2C Real-Time Clock and Calendar IC with Programmable Clock Output
The PCF8563T/5,518 is a CMOS real-time clock (RTC) and calendar IC designed for low power timekeeping applications. Manufactured by NXP Semiconductors, this device provides accurate tracking of seconds, minutes, hours, days, weekdays, months, and years while consuming very low power. It communicates with microcontrollers through a two-wire I2C interface, making it easy to integrate into embedded systems, IoT devices, and battery-powered electronics.
The RTC includes additional features such as a programmable clock output, interrupt output, and voltage-low detector to improve system reliability. Data and register addresses are transferred serially over the I2C bus with automatic address increment for efficient communication. With a maximum bus speed of 400 kbit/s and a compact SOIC-8 package, the PCF8563T is widely used in devices requiring reliable real-time tracking, such as industrial controllers, consumer electronics, and smart metering systems.
Key Features

Real-Time Clock and Calendar Tracks seconds, minutes, hours, days, weekdays, months, and years.
Low Power CMOS Design Optimised for battery-powered and low-power embedded systems.
I2C Communication Interface Two-wire bidirectional interface with up to 400 kbit/s bus speed.
Programmable Clock Output Provides configurable clock signal for system timing applications.
Interrupt Output Enables alarm and timer-based interrupt events for microcontroller control.
Voltage-Low Detection Detects supply voltage drops for improved system reliability.
Automatic Address Increment Simplifies multi-byte register read and write operations.
Compact SOIC-8 Package Suitable for compact PCB layouts.