X1227S8I-2.7T2

Overview

The X1227S8I-2.7T2 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, housed in an 8-SOIC surface-mount package. It provides clock/calendar functionality with HH:MM:SS and YY-MM-DD-dd formats via an I2C interface. The device supports 12/24-hour time modes and includes features such as alarms, leap year compensation, a watchdog timer, and a monitor. Operating voltages range from 1.8V to 5.5V for battery backup and 2.7V to 5.5V for main supply, with a maximum current consumption of 10µA to 20µA at 2.7V to 5V across an industrial temperature range of -40°C to 85°C.

Feature Summary

• Integrated Real-Time Clock with Calendar supporting HH:MM:SS and YY-MM-DD-dd formats
• I2C (2-wire serial) interface for communication
• Built-in alarm, leap year compensation, watchdog timer, and monitor functions
• Wide operating voltage range: 1.8V–5.5V (battery), 2.7V–5.5V (main)

Applications

• Data logging systems requiring precise timestamping
• Industrial control equipment needing real-time tracking
• Consumer electronics with calendar and alarm capabilities

Procurement Notes

The X1227S8I-2.7T2 is listed as obsolete or not recommended for new designs. Verification of availability through authorized distributors is required. Check for end-of-life notices and ensure compliance with RoHS status if applicable, as older variants may not meet current environmental standards.

Selection Notes

Select this component when an I2C-connected RTC with low power consumption and basic alarm/watchdog features is needed. Ensure the system voltage aligns with the 2.7V–5.5V operating range. Consider pin compatibility and software driver support for I2C registers before integration.

Part Context

This part belongs to the X1227 series of real-time clocks from Renesas. It is functionally similar to the X1226 but may include additional features like the watchdog timer. The 'T2' suffix typically indicates tape-and-reel packaging, while 'S8I' denotes the 8-SOIC package and industrial temperature grade.

Replacement Considerations

Direct replacements are not explicitly confirmed in public sources. Evaluate ISL12026IBZ-T or PCA8565TS/1,118 as potential alternatives, verifying pinout, register compatibility, and feature parity before substitution.