X1288S16I-4.5AT1

Overview

The X1288S16I-4.5AT1 is a Real Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock and calendar functions via an I2C, 2-Wire Serial interface. The device is housed in a 16-SOIC package with a width of 0.295 inches (7.50mm). Key functional features include alarm capabilities, leap year compensation, a supervisor function, and a watchdog timer. The date format supports YY-MM-DD structure.

Feature Summary

• Integrated real-time clock and calendar functionality with I2C serial interface
• Includes alarm generation, leap year compensation, supervisor, and watchdog timer features

Applications

• General purpose timekeeping in embedded systems
• Data logging applications requiring accurate timestamping
• Systems utilizing I2C communication protocols for peripheral control

Procurement Notes

Verify component status as the X1288S16I-4.5AT1 is listed as obsolete in available distributor records. Confirm availability through authorized channels or approved alternative sources if current production units are required. Ensure compatibility with existing PCB footprints and software drivers before procurement.

Selection Notes

Select this component for designs requiring a dedicated RTC with minimal external components. The I2C interface simplifies connectivity with microcontrollers. Consider the obsolete status when planning long-term production runs. Verify that the SOIC package dimensions fit the mechanical constraints of the target enclosure.

Part Context

This part belongs to the Renesas RTC family, designed for low-power timekeeping applications. It complements microcontroller-based systems by offloading time management tasks. The inclusion of a watchdog timer and supervisor adds system reliability features beyond basic timekeeping.

Replacement Considerations

Due to the obsolete status, direct substitutes should be identified based on pin compatibility and I2C interface support. Consult Renesas official cross-reference documentation for validated alternatives. Ensure replacement parts maintain similar feature sets such as leap year correction and alarm functions.