X1228S14I-2.7

Overview

The X1228S14I-2.7 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, belonging to the X1228 family. It provides clock/calendar functionality with time formats of HH:MM:SS (12/24 hour) and date formats of YY-MM-DD-dd. The device operates via an I2C, 2-wire serial interface and features alarms, leap year compensation, a supervisor, and a watchdog timer. It supports a supply voltage range of 2.7V to 5.5V, with battery backup from 1.8V to 5.5V. Timekeeping current consumption is 10µA to 20µA at 2.7V to 5V. It is housed in a 14-SOIC package (0.154", 3.90mm width) and functions within an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrated Real-Time Clock with Calendar functionality supporting HH:MM:SS and YY-MM-DD-dd formats
• I2C, 2-Wire Serial Interface for communication
• Built-in Alarm, Leap Year, Supervisor, and Watchdog Timer features
• Low power consumption: 10µA ~ 20µa @ 2.7V ~ 5V during timekeeping

Applications

• Systems requiring precise timekeeping and calendar tracking
• Industrial equipment needing watchdog timer and supervisor functions
• Battery-backed real-time clock applications

Procurement Notes

The X1228S14I-2.7 is listed as obsolete or not recommended for new designs. Verification of availability through authorized distributors is required. Check for RoHS compliance status, as some variants in this series may not meet current environmental standards. Confirm package type (14-SOIC) and voltage specifications match system requirements before procurement.

Selection Notes

Select this component when an I2C-based RTC with integrated safety features like watchdog timers and supervisors is needed. Ensure the system voltage aligns with the 2.7V to 5.5V supply range. Consider the 14-SOIC package constraints for PCB layout. Verify if the -40°C to 85°C industrial temperature range meets application needs.

Part Context

This part belongs to the X1228 series of Real-Time Clock ICs from Renesas. It shares core functionalities with other variants like the X1228S14I and X1228V14IZ-2.7A, differing primarily in package type (SOIC vs TSSOP) and specific suffix designations. The series is designed for general-purpose timekeeping in embedded systems.

Replacement Considerations

Publicly confirmed substitute part numbers for X1228S14I-2.7 are not explicitly provided in the available source data. Users should consult manufacturer documentation for direct pin-to-pin replacements or evaluate similar I2C RTCs with comparable feature sets.