X1227S8I-2.7

Overview

The X1227S8I-2.7 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, designed for precise timekeeping in electronic systems. It features an I2C serial interface and supports both 12-hour and 24-hour time formats alongside a YY-MM-DD-dd date format. The device includes alarm capabilities, leap year compensation, a watchdog timer, and a power-fail monitor. Operating within a supply voltage range of 2.7V to 5.5V, it consumes between 10µA and 20µA during timing operations at temperatures ranging from -40°C to 85°C. The component is housed in an 8-SOIC package.

Feature Summary

• Integrated Real-Time Clock with Calendar functionality
• I2C, 2-wire serial interface for communication
• Includes Alarm, Leap Year, Watchdog Timer, and Power-Fail Monitor features
• Supports HH:MM:SS (12/24 hour) and YY-MM-DD-dd formats

Applications

• Systems requiring accurate time and date tracking via I2C
• Devices utilizing battery backup for continuous timekeeping
• Applications needing watchdog timer protection and power-fail monitoring

Procurement Notes

Verify the specific suffix 'I' against official documentation to confirm temperature grade and RoHS compliance status, as variations exist within the X1227 family. Confirm availability status, as this part number may be discontinued or subject to last-time-buy notices. Ensure the selected package matches the 8-SOIC footprint required for the design.

Selection Notes

Select this component when a dedicated RTC with integrated system management features like watchdog and power-fail detection is required. Compare current consumption specifications against other RTC options if low-power operation is critical. Verify that the I2C address and register map are compatible with the host microcontroller's software architecture.

Part Context

This part belongs to the X1227 series of real-time clocks from Renesas. It shares functional similarities with the X1226 and X1228 models but differs in package options and specific feature sets such as the inclusion of a watchdog timer. It serves as a standalone timekeeping solution for embedded applications.

Replacement Considerations

Check for direct replacements within the X1227 series or cross-reference with the X1226 series if pin compatibility is required. Verify if updated versions with different suffixes offer improved compliance or availability.