X1227S8IZ-2.7

Overview

The X1227S8IZ-2.7 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, housed in an 8-SOIC surface-mount package. It operates within a supply voltage range of 2.7V to 5.5V and supports I2C and 2-wire serial interfaces for data communication. The device provides timekeeping capabilities with HH:MM:SS formats in both 12-hour and 24-hour modes, alongside date tracking in YY-MM-DD-dd format. Key functional features include alarm generation, leap year compensation, power failure monitoring, and a watchdog timer. The maximum current consumption during timing operations ranges from 10µA to 20µA depending on the supply voltage. It is rated for industrial operating temperatures between -40°C and +85°C.

Feature Summary

• Integrated Real-Time Clock with calendar functions including leap year adjustment
• Supports I2C and 2-wire serial communication interfaces
• Includes hardware alarms, power failure monitor, and watchdog timer
• Operates on 2.7V to 5.5V supply with low standby current

Applications

• Data logging systems requiring precise timestamping
• Industrial control units needing independent timekeeping
• Embedded devices with power failure event recording requirements

Procurement Notes

This component is listed as discontinued or obsolete in available distributor records. Verification of current availability requires checking authorized channels for remaining stock or end-of-life status confirmation. Sourcing should prioritize verified distributors to ensure authenticity, as replacement components may be necessary for new designs.

Selection Notes

Select this part when an I2C-compatible RTC with integrated power supervision and watchdog functionality is required in an 8-pin SOIC package. Ensure the system voltage aligns with the 2.7V to 5.5V operating range. Verify that the 2-wire serial interface compatibility matches the host microcontroller's peripheral capabilities.

Part Context

The X1227 series belongs to Renesas' portfolio of real-time clock and calendar ICs designed for standalone timekeeping applications. The 'S8IZ' suffix indicates the specific 8-SOIC package variant and temperature rating. This model integrates supervisory functions typically found in separate voltage monitor chips, consolidating multiple system management tasks into a single component.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status, alternative solutions require evaluating other Renesas RTC models or third-party equivalents with matching I2C interfaces, package dimensions, and feature sets.