PCF8563P/F4,112

Real Time Clock Overview

The PCF8563P/F4,112 is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption. It provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal. The device features a programmable clock output, interrupt output, and voltage-low detector. All addresses and data are transferred serially via a two-line bidirectional I²C-bus with a maximum bus speed of 400 kbit/s. Register addresses increment automatically after each written or read data byte.

Real Time Clock Feature Summary

• Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
• Clock operating voltage: 1.0 V to 5.5 V at room temperature
• Low backup current; typical 0.25 μA at VDD = 3.0 V and Tamb = 25 °C
• 400 kHz two-wire I²C-bus interface (at VDD = 1.8 V to 5.5 V)
• Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz, and 1 Hz)

Real Time Clock Applications

• Mobile telephones
• Portable instruments
• Electronic metering
• Battery-powered products

Real Time Clock Procurement Notes

Verify the specific package type required for the design, as the PCF8563 family is available in multiple packages including SO8, TSSOP8, and HVSON10. Confirm that the ordering suffix corresponds to the desired package variant. Note that this component may be subject to end-of-life status; check for recommended replacement parts if long-term supply is required.

Real Time Clock Selection Notes

Select the PCF8563 for applications requiring low-power real-time keeping with I²C interface compatibility. Ensure the system voltage falls within the 1.0 V to 5.5 V operating range. Consider the integrated oscillator capacitor and internal Power-On Reset (POR) when designing the external circuitry. Verify that the 400 kHz I²C bus speed meets the system communication requirements.

Real Time Clock Part Context

The PCF8563 is part of NXP's RTC portfolio, designed for cost-effective and power-efficient timekeeping solutions. It is widely used in consumer electronics where battery life is critical. The device integrates alarm and timer functions, making it suitable for complex scheduling tasks in portable devices.

Real Time Clock Replacement Considerations

The datasheet explicitly states that the PCF8563 is not recommended for new designs and recommends the PCF85063ATL as the replacement part.