X1288V14I-4.5AT1

Overview

The X1288V14I-4.5AT1 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, formerly Intersil. It combines a clock/calendar function with 32KB of EEPROM storage in a single package. The device communicates via an I2C, 2-wire serial interface and operates within a supply voltage range of 4.5V to 5.5V. Key features include alarm capabilities, leap year compensation, a watchdog timer, and Y2K compliance. It supports time formats of HH:MM:SS:hh (24-hour) and date formats of YY-MM-DD-dd. The maximum current consumption during timekeeping is specified between 10µA and 20µA at voltages from 2.7V to 5V.

Feature Summary

• Integrated 32KB EEPROM for data storage alongside RTC functionality
• I2C, 2-Wire Serial Interface for communication
• Features include Alarm, Leap Year, Supervisor, Watchdog Timer, and Y2K compliance
• Operating temperature range of -40°C to 85°C (TA)
• Available in 14-TSSOP package

Applications

• Industrial control systems requiring precise timekeeping and non-volatile data storage
• Consumer electronics with battery backup requirements
• Automotive infotainment or instrument clusters needing RTC and memory integration

Procurement Notes

Verify the manufacturer status as the component originates from Intersil, which was acquired by Renesas. Confirm the specific suffix 'T1' indicates tape-and-reel packaging if required for automated assembly. Check for RoHS compliance status and ensure the 14-TSSOP package dimensions match the design constraints. Availability may vary due to the legacy nature of the product line.

Selection Notes

Select this component when a combined RTC and EEPROM solution is needed to save board space. Ensure the system voltage aligns with the 4.5V to 5.5V operating range. Verify that the I2C bus speed is compatible with the device's specifications. Consider the -40°C to 85°C industrial temperature range for environmental suitability. Compare power consumption against other RTC options if low-power standby is critical.

Part Context

This part belongs to the X1288 series of real-time clock and calendar ICs with embedded EEPROM. The series is designed for applications requiring both timekeeping and persistent data storage without external components. The 'V14' designation typically refers to the industrial temperature grade and package type. The 'I' suffix often denotes industrial temperature range, while '4.5A' specifies the voltage range.

Replacement Considerations

Direct replacements should be sought from the Renesas X1288 family. Verify pin compatibility and software register mapping before substitution. Alternative parts must support I2C interface and similar EEPROM capacity. Check for updated manufacturing sources if the original Intersil stock is depleted.