X1226S8IZ

Overview

The X1226S8IZ is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock/calendar functionality with alarm and leap year compensation features. The device communicates via an I²C, 2-wire serial interface. It supports HH:MM:SS time formats in both 12-hour and 24-hour modes, and YY-MM-DD-dd date formats. The component operates within a supply voltage range of 2.7V to 5.5V, with a battery supply range of 1.8V to 5.5V. Maximum current consumption during timekeeping is specified as 10µA to 20µA at 2.7V to 5V. It is housed in an 8-SOIC package (0.154", 3.90mm width) and is rated for an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrated Real-Time Clock with Calendar functionality
• I²C, 2-Wire Serial Interface
• Alarm and Leap Year Compensation features
• Low Power Consumption: 10µA ~ 20µa @ 2.7V ~ 5V

Applications

• Data logging systems requiring precise timestamping
• Consumer electronics with calendar functions
• Industrial equipment needing real-time tracking
• Battery-powered devices utilizing low standby current

Procurement Notes

The X1226S8IZ is classified as Obsolete by the manufacturer. Verification of availability should focus on surplus distributors or alternative sources. Designers must confirm lead times and authenticity through authorized channels due to the discontinued status. Replacement parts such as ISL12026IBZ-T are available from Renesas.

Selection Notes

Select this component when an I²C RTC with alarm capabilities is required in an 8-SOIC package. Ensure the system voltage aligns with the 2.7V to 5.5V supply range. For applications requiring extended temperature ranges beyond standard commercial limits, verify the industrial grade (-40°C to 85°C) suffices. Consider the obsolete status and plan for long-term supply chain risks or migration to newer equivalents like the ISL12026 series.

Part Context

The X1226S8IZ belongs to the X1226 family of real-time clocks. It shares functional similarities with other Renesas RTCs but is distinguished by its specific package and feature set including alarms. The base product number is X1226. This part is superseded by the ISL12026 series, which offers similar functionality with updated manufacturing support.

Replacement Considerations

The ISL12026IBZ-T is a confirmed similar replacement from Renesas Electronics Corporation. It maintains I²C interface and RTC functionality. Verify pinout compatibility and register mapping before substitution.