X1228V14IZ-2.7

Overview

The X1228V14IZ-2.7 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, belonging to the X1228 series. It provides clock/calendar functionality via an I2C interface in a 14-TSSOP package. The device operates on a main supply voltage of 2.7V to 5.5V and supports a backup battery input ranging from 1.8V to 5.5V. Key electrical characteristics include a maximum timekeeping current of 10µA to 20µA at 2.7V to 5V. It features non-volatile memory for date and time retention and includes hardware alarms, leap year compensation, and watchdog timer capabilities.

Feature Summary

• Integrated Real-Time Clock with Calendar supporting HH:MM:SS and YY-MM-DD-dd formats
• I2C Serial Interface for communication
• Low Power Consumption with Timekeeping Current of 10µA ~ 20µA @ 2.7V ~ 5V
• Hardware Features including Alarm, Leap Year, Supervisor, and Watchdog Timer

Applications

• Data logging systems requiring precise timestamping
• Industrial equipment needing real-time monitoring and scheduling
• Consumer electronics utilizing low-power timekeeping functions

Procurement Notes

This component is classified as obsolete and no longer manufactured by Renesas Electronics Corporation. Verification of availability should focus on distributor surplus stock or authorized replacement components. Buyers must confirm RoHS compliance status, as specific suffix variations may differ in environmental certification. Cross-referencing with the manufacturer's official End-of-Life (EOL) notices is recommended before procurement planning.

Selection Notes

Designers should verify the operating temperature range of -40°C to 85°C against application requirements. The 14-TSSOP package dimensions (0.173" width) must be accommodated in the PCB layout. Since the part is obsolete, alternative RTC ICs with compatible I2C interfaces and similar power profiles should be evaluated for long-term production viability.

Part Context

The X1228V14IZ-2.7 is part of the broader X1228 family of real-time clocks. This series is designed for applications requiring accurate timekeeping with minimal power consumption. The 'V' indicates the TSSOP package, 'I' denotes the industrial temperature range, 'Z' signifies lead-free/RoHS compliance, and '2.7' specifies the minimum supply voltage rating.

Replacement Considerations

Publicly documented substitutes include the BU9873NUX-TTR from Rohm Semiconductor and the DS1388Z-5+ from Analog Devices Inc./Maxim Integrated. These alternatives offer similar RTC functionalities and should be validated for pin compatibility and electrical specifications.