X1226S8IT1

Real Time Clock Overview

The X1226S8IT1 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, belonging to the X1226 series. It provides clock and calendar functionality with an I²C, 2-wire serial interface. The device supports time formats of HH:MM:SS in both 12-hour and 24-hour modes, and date formats of YY-MM-DD-dd. Key features include alarm capabilities and leap year compensation. It operates within a supply voltage range of 2.7V to 5.5V for main power and 1.8V to 5.5V for battery backup. Maximum current consumption during timekeeping is 10µA to 20µA at 2.7V to 5V. The component is housed in an 8-SOIC package with a width of 3.90mm.

Real Time Clock Feature Summary

• I²C 2-Wire Serial Interface
• Alarm Functionality
• Leap Year Compensation
• 12/24 Hour Time Format Support

Real Time Clock Applications

• Clock/Calendar Systems
• Data Logging Devices
• Industrial Control Equipment

Real Time Clock Procurement Notes

The X1226S8IT1 is classified as obsolete or not recommended for new designs. Verification of availability requires checking distributor stock lists for remaining inventory or end-of-life status confirmation. Sourcing may involve limited quantities from authorized channels or secondary markets.

Real Time Clock Selection Notes

Designers should consider that this part is obsolete. When selecting a replacement, verify pin compatibility and software register mapping. Ensure the substitute supports the required I²C interface and voltage ranges. Check if the alternative offers improved power consumption or extended temperature ranges suitable for the specific application environment.

Real Time Clock Part Context

This component is part of the X1226 family of real-time clocks. It shares core functionalities with other variants in the series, such as different packaging options or temperature grades. The 'T1' suffix typically indicates tape and reel packaging, distinguishing it from tube-packaged versions like the X1226S8I.

Real Time Clock Replacement Considerations

Public confirmed substitutes include ISL12026IBZ-T and PCA8565TS/1,118. Verify functional equivalence regarding I²C protocol and memory map before integration.