X1226V8T2

Overview

The X1226V8T2 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 both 12 and 24-hour modes, and YY-MM-DD-dd date format. Key features include alarm capabilities and leap year compensation. It operates within a supply voltage range of 2.7V to 5.5V for the main supply and 1.8V to 5.5V for battery backup. The maximum current consumption during timing is between 10µA and 20µA at 2.7V to 5V. The component is housed in an 8-TSSOP package with a width of 0.173 inches (4.40mm). It is designed for surface mount installation and functions within a temperature range of -40°C to 85°C.

Feature Summary

• Provides accurate real-time clock and calendar tracking with leap year compensation
• Supports programmable alarms for system event triggering
• Enables low-power operation with dedicated battery backup input
• Interfaces via standard I2C 2-wire serial protocol

Applications

• Data logging systems requiring precise timestamping
• Industrial control equipment needing time-stamped event records
• Consumer electronics with clock display or scheduling functions
• Embedded systems requiring power-fail time retention

Procurement Notes

Verify the specific suffix T2 indicates tape and reel packaging when sourcing. Confirm RoHS compliance status as older variants may differ. Ensure the supplier provides genuine Renesas products due to potential counterfeits. Check for obsolescence notices as this part number may be discontinued or superseded by newer series like ISL12026. Validate the 8-TSSOP package dimensions against your PCB footprint requirements before ordering.

Selection Notes

Select this component when an I2C interface RTC is required for space-constrained designs using 8-pin packages. Consider the 2.7V minimum operating voltage for compatibility with lower voltage logic levels. Evaluate the 10µA to 20µA current consumption against battery life requirements for portable devices. Ensure the design accommodates the external 32.768kHz crystal typically required for this family, although not explicitly detailed in the snippet, it is standard for this architecture.

Part Context

The X1226 series represents Renesas' line of low-power real-time clocks. The X1226V8T2 specifically denotes the 8-TSSOP variant with tape-and-reel packaging. This model belongs to a family known for integrating calendar functions and alarms into a compact form factor. It serves as a timekeeping solution for applications where microcontroller resources are limited or precise independent timekeeping is necessary.

Replacement Considerations

The ISL12026IBZ-T is a confirmed substitute part number from Renesas Electronics Corporation. Verify pinout compatibility and software register mapping differences between the X1226 and ISL12026 families before replacement. Ensure the alternative package type matches the existing PCB layout constraints.