PCF85063AT/AAZ

Real Time Clock Overview

The PCF85063AT/AAZ is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption, manufactured by NXP Semiconductors. It operates within a clock voltage range of 0.9 V to 5.5 V and features a 400 kHz two-line I2C-bus interface. The device provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal. Typical current consumption is 0.22 μA at VDD = 3.3 V and Tamb = 25 °C. It includes an offset register for fine-tuning the clock, selectable integrated oscillator load capacitors (7 pF or 12.5 pF), alarm functions, a countdown timer, minute/half-minute interrupts, and oscillator stop detection.

Real Time Clock Feature Summary

• Low current consumption: typical 0.22 μA at VDD = 3.3 V and Tamb = 25 °C
• 400 kHz two-line I2C-bus interface operating at VDD = 1.8 V to 5.5 V
• Programmable clock output for peripheral devices (32.768 kHz down to 1 Hz)
• Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF

Real Time Clock Applications

• Digital still camera
• Digital video camera
• Printers
• Copy machines
• Mobile equipment
• Battery-powered devices

Real Time Clock Procurement Notes

Verify the ordering suffix AAZ corresponds to the SO8 package with a minimum order quantity of 1000 units in a 7-inch reel packing method. Confirm the temperature range is -40 °C to +85 °C. Ensure compatibility with standard I2C bus protocols and check for any specific moisture sensitivity level requirements during storage and handling.

Real Time Clock Selection Notes

Select this component when low power consumption and high accuracy are required for battery-operated applications. The PCF85063AT/AAZ offers an offset register for frequency adjustment and selectable internal load capacitors, simplifying external crystal selection. Ensure the system voltage falls within the 0.9 V to 5.5 V range and that the I2C bus speed does not exceed 400 kHz.

Real Time Clock Part Context

The PCF85063AT/AAZ belongs to the PCF85063A family of tiny real-time clocks/calendars with alarm functions and I2C-bus interfaces. It is available in multiple packages including SO8, DFN2626-10, and TSSOP8. The AAZ suffix specifically denotes the SO8 plastic small outline package variant with a 7-inch reel packing method.

Real Time Clock Replacement Considerations

Direct replacements within the same package and functionality include other variants of the PCF85063A family such as PCF85063AT/AY (SO8, 13-inch reel). Verify pinout compatibility and register mapping before substitution.