PCF85263ATT1/AZ

Real Time Clock Overview

The PCF85263ATT1/AZ is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption, featuring automatic switching to battery on main power loss. It provides year, month, day, weekday, hours, minutes, seconds, and 100th seconds based on a 32.768 kHz quartz crystal. The device includes two independent alarms, three timestamp registers triggered by battery switch-over or input events, and a watchdog timer. It operates with a clock voltage of 0.9 V to 5.5 V and features a 400 kHz I2C-bus interface.

Real Time Clock Feature Summary

• Automatic battery switch-over circuit maintains timekeeping during power loss
• Two independent alarms and three timestamp registers for event logging
• Stop-watch mode for elapsed time counting from 100th seconds to 999,999 hours
• Low current consumption: typical 0.28 µA at VDD = 3.0 V and Tamb = 25 °C

Real Time Clock Applications

• Printers and copiers
• Electronic metering
• Digital cameras
• White goods
• Data loggers

Real Time Clock Procurement Notes

Verify the ordering suffix 'AZ' corresponds to the Static Shielding Bag (SSB) packing method as specified in the NXP data sheet. Ensure compatibility with the TSSOP10 package dimensions and pin configuration before procurement.

Real Time Clock Selection Notes

Select this component for applications requiring precise timekeeping with backup capabilities. Consider the TSSOP10 package if additional pins like CLK and TS are needed compared to the TSSOP8 variant. Verify operating temperature range requirements against the -40 °C to +85 °C specification.

Real Time Clock Part Context

The PCF85263ATT1/AZ belongs to the PCF85263A family of tiny RTCs. It serves as a drop-in replacement for the discontinued PCF85263ATT1/AJ, maintaining functional compatibility while utilizing a different packaging solution (SSB).

Real Time Clock Replacement Considerations

The PCF85263ATT1/AZ is the confirmed drop-in replacement for the PCF85263ATT1/AJ per PCN 202104008A. Both share identical functionality but differ in packaging handling requirements.