PCF8563T/F4,118

Real Time Clock Overview

The PCF8563T/F4,118 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 400 kHz two-wire I²C-bus interface with target addresses A2h (write) and A3h (read). Operating voltage ranges from 1.0 V to 5.5 V at room temperature, with a typical backup current of 0.25 μA at VDD = 3.0 V and Tamb = 25 °C. It includes programmable clock outputs, alarm/timer functions, an integrated oscillator capacitor, and an internal Power-On Reset.

Real Time Clock Feature Summary

• Provides complete timekeeping (year/month/day/weekday/hours/minutes/seconds) using a 32.768 kHz quartz crystal.
• Supports 400 kHz I²C-bus interface operating at VDD levels between 1.8 V and 5.5 V.
• Features low backup current, typically 0.25 μA at VDD = 3.0 V and Tamb = 25 °C.
• Includes programmable clock output (32.768 kHz, 1.024 kHz, 32 Hz, 1 Hz), alarm, timer, and voltage-low detector.

Real Time Clock Applications

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

Real Time Clock Procurement Notes

Verify the specific ordering suffix /F4,118 against the manufacturer's latest documentation to confirm package type and availability status. The datasheet indicates that certain variants within the PCF8563 family are not recommended for new designs; ensure this specific part number is approved for current production use before finalizing procurement plans.

Real Time Clock Selection Notes

Select this component when a low-power RTC with I²C interface is required for battery-operated systems. Ensure the system voltage falls within the 1.0 V to 5.5 V range. Note that the register address increments automatically after each byte transfer. For new designs, verify if replacement parts like the PCF85063ATL are more suitable, as some PCF8563 variants are marked as not recommended for new designs.

Real Time Clock Part Context

The PCF8563 series is a line of CMOS real-time clocks and calendars designed by NXP Semiconductors. The PCF8563T/F4,118 specifically denotes the SO8 plastic small outline package variant. This series is widely used in consumer electronics where accurate timekeeping and low power consumption are critical requirements.

Real Time Clock Replacement Considerations

The datasheet explicitly states that the PCF8563T/F4 is not recommended for new designs. The confirmed replacement part is PCF85063ATL. Designers should evaluate the PCF85063ATL for new projects to ensure long-term supply availability.