X1226V8IT1

Real Time Clock Overview

The X1226V8IT1 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 supports I2C, 2-wire serial interface for communication. Time format includes HH:MM:SS in 12/24-hour modes, and date format is YY-MM-DD-dd. Supply voltage ranges from 2.7V to 5.5V, with battery backup support from 1.8V to 5.5V. Maximum current consumption during timekeeping is 10µA to 20µA at 2.7V to 5V. Operating temperature spans -40°C to 85°C. The component is housed in an 8-TSSOP package with a width of 0.173 inches (4.40mm).

Real Time Clock Feature Summary

• Provides accurate real-time clock and calendar tracking with automatic leap year adjustment.
• Supports programmable alarms for system wake-up or event triggering.
• Enables low-power operation suitable for battery-backed applications.
• Interfaces via standard I2C 2-wire serial protocol for simple host integration.

Real Time Clock Applications

• Data logging systems requiring precise timestamping.
• Battery-powered consumer electronics needing timekeeping capabilities.
• Industrial control systems with environmental monitoring requirements.
• Embedded devices utilizing I2C communication buses.

Real Time Clock Procurement Notes

Verify the specific suffix 'T1' against official Renesas documentation to confirm tape-and-reel packaging specifications, as generic datasheets may not detail this variant's handling requirements. Confirm RoHS compliance status for the specific manufacturing lot, as older production runs may differ. Ensure the source is an authorized distributor to avoid counterfeit components, given the obsolete status of some related family members. Check for any specific storage or moisture sensitivity level (MSL) constraints associated with the T1 packaging designation before procurement.

Real Time Clock Selection Notes

Select this component when a reliable RTC with I2C interface is required for space-constrained designs using 8-pin packages. Consider the wide supply voltage range for flexibility in power design. Evaluate the operating temperature range against the intended application environment. Compare power consumption metrics if battery life is a critical constraint. Verify pin compatibility with existing PCB layouts if replacing similar RTCs.

Real Time Clock Part Context

The X1226 series represents Renesas' line of real-time clock ICs designed for general-purpose timekeeping. The V8I suffix typically denotes the industrial temperature grade (-40°C to 85°C) and the TSSOP package type. This part belongs to a family that emphasizes low power consumption and ease of integration via I2C. While some variants in the series are marked obsolete, the X1226V8IT1 remains a specific configuration within this product line.

Real Time Clock Replacement Considerations

ISL12026IBZ-T is listed as a similar replacement option by distributors. PCA8565TS/1,118 is another alternative noted in market data. Verify pinout and register compatibility before substituting, as these parts may have different feature sets or electrical characteristics despite similar interfaces.