X1228V14Z

Overview

The X1228V14Z is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock/calendar functionality via an I2C, 2-wire serial interface. The device supports time formats of HH:MM:SS in both 12-hour and 24-hour modes, and date formats of YY-MM-DD-dd. It operates with a supply voltage range of 2.7V to 5.5V, while battery backup support extends from 1.8V to 5.5V. Maximum current consumption during timekeeping is specified between 10µA and 20µA at 2.7V to 5V. The component is housed in a 14-TSSOP package with a width of 4.40mm.

Feature Summary

• Integrated alarm function and leap year compensation for accurate long-term timekeeping.
• Includes supervisor and watchdog timer features for system monitoring and reset capabilities.
• Supports low-power operation with battery backup voltage range down to 1.8V.
• Operates within an industrial temperature range of -40°C to 85°C.

Applications

• Industrial control systems requiring precise time synchronization.
• Data logging equipment needing calendar tracking.
• Consumer electronics utilizing I2C-based real-time clock management.

Procurement Notes

The X1228V14Z is classified as obsolete and no longer manufactured by Renesas Electronics Corporation. Verification of availability should focus on surplus or secondary market sources rather than direct manufacturer distribution. Buyers must confirm the specific suffix variations, such as RoHS compliance status, as different suffixes may indicate varying environmental certifications or packaging types. Cross-referencing with official replacement recommendations is advised for new designs.

Selection Notes

Select this component only if legacy compatibility with the X1228 family is required. Ensure the design accommodates the 14-TSSOP package dimensions and I2C interface constraints. Verify that the operating voltage requirements align with the 2.7V to 5.5V main supply and 1.8V to 5.5V battery supply specifications. Consider the maximum timekeeping current of 20µA for power budget calculations.

Part Context

This part belongs to the X1228 series of RTC ICs. It shares core functionalities with variants like the X1228S14I and X1228V14IZ-2.7A, differing primarily in package type and specific suffix designations. The series is characterized by its combination of timekeeping, alarms, and system supervision in a single I2C-accessible device.

Replacement Considerations

Publicly confirmed substitute part numbers are not explicitly listed for the X1228V14Z in the provided source data. Designers should consult Renesas documentation for recommended obsolescence replacements or evaluate similar I2C RTCs from other manufacturers if pin-compatible alternatives are needed.