X1227S8-2.7T1

Overview

The X1227S8-2.7T1 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, designed for precise timekeeping in embedded systems. It features an I2C interface and operates within a supply voltage range of 2.7V to 5.5V, with battery backup support from 1.8V to 5.5V. The device provides clock/calendar functionality including leap year compensation, alarms, and watchdog timers. It is housed in an 8-SOIC package and supports HH:MM:SS and YY-MM-DD-dd formats. The component has reached end-of-life status.

Feature Summary

• Integrated Real-Time Clock with Calendar and Alarm functions
• I2C Serial Interface for system communication
• Low power consumption: 10µA to 20µA at 2.7V to 5V
• Includes Watchdog Timer and Leap Year Compensation

Applications

• Embedded systems requiring accurate time stamping
• Data logging equipment needing calendar tracking
• Industrial control units with watchdog protection requirements

Procurement Notes

This component is officially listed as End-of-Life (EOL) by the manufacturer. Procurement is restricted to remaining stock or secondary market sources. Verification of authenticity and storage history is critical due to the discontinued status. No new production orders can be placed directly with Renesas Electronics Corporation.

Selection Notes

Designers should evaluate alternative RTCs with similar I2C interfaces and low-power characteristics. Consider packages such as 8-SOIC or 14-TSSOP depending on board space. Verify that replacement parts support the required voltage ranges (2.7V–5.5V) and include necessary features like watchdog timers if used in safety-critical applications.

Part Context

The X1227 series belongs to Renesas' line of real-time clock ICs offering integrated memory and supervision features. This specific model utilizes an 8-pin SOIC package, distinguishing it from higher-pin-count variants like the X1228. It serves as a standalone timing solution without requiring external crystals in some configurations, though datasheet verification is recommended for oscillator details.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users must identify cross-compatible RTCs based on pinout, interface, and electrical specifications independently.