X1226V8ZT1

Overview

The X1226V8ZT1 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock/calendar functionality with an I²C, 2-wire serial interface. The device supports HH:MM:SS time format in 12/24-hour modes and YY-MM-DD-dd date formats. It features alarm capabilities and leap year compensation. The component operates within a supply voltage range of 2.7V to 5.5V, with battery supply support from 1.8V to 5.5V. Timekeeping current consumption ranges from 10µA to 20µA at 2.7V to 5V. It is housed in an 8-TSSOP package with a width of 0.173 inches (4.40mm).

Feature Summary

• Provides precise clock and calendar tracking with alarm functions.
• Supports both 12-hour and 24-hour time formats.
• Includes automatic leap year compensation logic.
• Utilizes standard I²C two-wire serial communication.

Applications

• Data logging systems requiring timestamp accuracy.
• Consumer electronics with real-time scheduling needs.
• Industrial equipment monitoring applications.
• Embedded systems utilizing I²C interfaces.

Procurement Notes

Verify the specific suffix ZT1 against official Renesas documentation to confirm tape-and-reel packaging specifications. Confirm RoHS compliance status as historical data indicates potential variations within the X1226 family. Ensure compatibility with system voltage levels, noting the distinct battery supply range compared to main supply requirements. Cross-reference the manufacturer part number with authorized distributors to avoid obsolete or counterfeit components.

Selection Notes

Select this component for designs requiring low-power real-time tracking via I²C. Consider the 8-TSSOP package constraints for PCB layout. Evaluate power budget against the specified timekeeping current range. Verify that the operating temperature range meets environmental requirements. Check for available substitutes if production volume requires active status parts.

Part Context

The X1226 series represents Renesas' line of real-time clock ICs designed for general-purpose timing applications. This model integrates calendar and alarm functions into a compact surface-mount package. It serves as a cost-effective solution for maintaining accurate time in battery-backed systems. The series is widely used in embedded applications where precise timekeeping is critical for data integrity.

Replacement Considerations

The ISL12026IBZ-T is listed as a similar substitute part number by Renesas. Verify pinout and feature compatibility before replacement. Note that the X1226V8I is also identified as obsolete with available alternatives. Confirm functional equivalence regarding I²C protocol and alarm configurations.