X1228V14I

Overview

The X1228V14I is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It combines clock/calendar functionality with CPU supervision and EEPROM storage in a single device. The component operates on a 2-wire serial interface, specifically I2C. It supports a main supply voltage range of 2.7V to 5.5V and a battery backup range of 1.8V to 5.5V. The timekeeping current consumption is specified between 10µA and 20µA at the operating voltage. The device is housed in a 14-TSSOP package with a width of 4.40mm and is rated for an industrial operating temperature range of -40°C to 85°C.

Feature Summary

• Integrated Real-Time Clock/Calendar with CPU Supervisor and EEPROM
• I2C 2-Wire Serial Interface for communication
• Low Power Consumption: 10µA ~ 20µA during timekeeping
• Dual Supply Support: Main (2.7V-5.5V) and Battery (1.8V-5.5V)

Applications

• Industrial control systems requiring precise timekeeping
• Embedded devices needing non-volatile date/time logging
• Systems utilizing CPU supervisor functions for reliability

Procurement Notes

The X1228V14I is listed as obsolete or not recommended for new designs in available distributor records. Verification of current manufacturing status and end-of-life notices from Renesas Electronics Corporation is required before procurement planning. Alternative components may need to be evaluated for long-term supply chain stability.

Selection Notes

Select this component when a combined RTC, EEPROM, and supervisor function is required in a 14-pin surface-mount package. Ensure the design accommodates the 2.7V minimum VCC and 1.8V minimum VBAT requirements. Verify that the I2C bus speed and addressing align with the system controller capabilities.

Part Context

The X1228V14I belongs to the X1228 family of real-time clocks. This series integrates memory and timing functions to reduce board space. The 'V14' suffix typically denotes the 14-TSSOP package variant within the product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source data. Designers should consult Renesas Electronics Corporation for official cross-reference recommendations or equivalent functional replacements.