PCF85263ATL/AX

Real Time Clock Overview

The PCF85263ATL/AX is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption, manufactured by NXP Semiconductors. It features automatic switching to battery backup upon main power loss and supports I2C-bus interface at up to 400 kHz. The device provides year, month, day, weekday, hours, minutes, seconds, and 100th seconds based on a 32.768 kHz quartz crystal. Operating voltage ranges from 0.9 V to 5.5 V with typical current consumption of 0.28 µA at 3.0 V. It includes two independent alarms, three timestamp registers, a watchdog timer, and programmable clock outputs.

Real Time Clock Feature Summary

• Automatic battery switch-over function for continuous timekeeping during power loss
• Two independent alarms and three timestamp registers triggered by events or battery switch-over
• Stop-watch mode for elapsed time counting from 100th seconds to 999,999 hours
• Configurable oscillator circuit supporting CL = 6 pF, 7 pF, and 12.5 pF

Real Time Clock Applications

• Printers and copiers
• Electronic metering devices
• Digital cameras and white goods
• Data loggers and digital voice recorders
• Battery-backed systems and mobile equipment

Real Time Clock Procurement Notes

Verify the ordering part number PCF85263ATL/AX corresponds to the DFN2626-10 package in Reel 7" packing with a minimum order quantity of 4000 units. Confirm the temperature range is -40 °C to +85 °C. Ensure compatibility with the specified 7-inch reel format for automated assembly processes.

Real Time Clock Selection Notes

Select this component when a tiny RTC with battery switch-over and timestamp input is required. The DFN2626-10 package offers an extremely thin profile suitable for space-constrained designs. Ensure the application supports the 400 kHz I2C bus speed and utilizes a 32.768 kHz quartz crystal compatible with the configurable load capacitance options.

Real Time Clock Part Context

The PCF85263ATL/AX belongs to the PCF85263A family of tiny RTCs. It is distinct from other packages like SO8 or TSSOP8 by its DFN2626-10 form factor. The 'AX' suffix indicates the specific packing method (Reel 7") and temperature grade within the broader PCF85263ATL/A type number.

Real Time Clock Replacement Considerations

For discontinued PCF85263ATT1/AJ, the drop-in replacement is PCF85263ATT1/AZ. For the AT/L variant, verify if PCF85263ATL/AJ serves as a direct substitute depending on packaging requirements.