X1226V8IZT1

Overview

The X1226V8IZT1 is a micro power real-time clock (RTC) IC manufactured by Renesas Electronics Corporation. It integrates a crystal oscillator, calendar, and timer functions with I2C interface capability. The device supports 12/24-hour time formats and YY-MM-DD-day-of-week date tracking with automatic leap year correction through 2099. It operates on a main supply voltage of 2.7V to 5.5V and a battery backup supply of 1.8V to 5.5V. Timekeeping current consumption ranges from 10µA to 20µA at 2.7V to 5V. The component is housed in an 8-TSSOP package with a width of 4.40mm and is rated for industrial temperatures between -40°C and +85°C.

Feature Summary

• Integrated I2C 2-wire serial interface for communication
• Automatic leap year correction valid through 2099
• Intelligent battery backup switching mechanism
• Two programmable periodic or polled alarms

Applications

• Data logging systems requiring precise timestamping
• Industrial control equipment needing reliable timekeeping
• Battery-powered consumer electronics with low power constraints

Procurement Notes

Verify the obsolete status of this specific part number before design finalization. Confirm that the manufacturer has officially discontinued production. Ensure that any available stock is genuine and stored under appropriate conditions to maintain reliability. Check for RoHS compliance status as older batches may not meet current environmental regulations.

Selection Notes

Select this component only if legacy compatibility with the X1226 family is required. Verify that the 8-TSSOP package dimensions fit the PCB layout constraints. Ensure the system design accommodates the external 32.768kHz crystal requirement. Consider the maximum timekeeping current when calculating battery life expectancy for long-term deployment.

Part Context

This part belongs to the X1226 series of real-time clocks. It shares functional similarities with the ISL12026 series but utilizes different power control settings. The 'V' suffix indicates the TSSOP package variant, while 'ZT1' typically denotes tape and reel packaging configuration within the manufacturer's coding scheme.

Replacement Considerations

The ISL12026IBZ-T is listed as a similar replacement option by distributors. Verify pin-to-pin compatibility and register mapping differences before substitution. The PCA8565TS/1,118 is another alternative but requires interface and feature verification against specific application requirements.