X1227V8IZ-4.5A

Overview

The X1227V8IZ-4.5A is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock and calendar functions via an I2C, 2-wire serial interface. The device operates within a supply voltage range of 4.5V to 5.5V and supports battery backup from 1.8V to 5.5V. It features a maximum current consumption of 10µA to 20µA at 2.7V to 5V. The component is housed in an 8-TSSOP package with dimensions of 0.173 inches (4.40mm) width. It supports surface mount installation and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Provides accurate timekeeping with clock and calendar capabilities including leap year compensation.
• Interfaces with host systems using standard I2C, 2-wire serial communication protocols.
• Supports alarm functionality for system event triggering or wake-up operations.

Applications

• Industrial control systems requiring precise time tracking
• Data logging equipment needing calendar date storage
• Embedded devices utilizing I2C-based real-time synchronization

Procurement Notes

This component is officially listed as obsolete or discontinued by the manufacturer. Procurement must focus on verifying stock availability through authorized distributors or surplus suppliers. Buyers should confirm authenticity and date codes carefully, as replacement parts may require validation against original specifications. No new production units are expected; ensure supply chain stability before finalizing orders.

Selection Notes

Select this part only if a 4.5V to 5.5V supply voltage is mandatory, as newer variants support lower voltages. Verify that the 8-TSSOP package fits the PCB layout constraints. Consider the I2C interface compatibility with the target microcontroller. Since the part is discontinued, evaluate alternative RTC models with similar pinouts and electrical characteristics for long-term design sustainability.

Part Context

The X1227 series belongs to Renesas' family of standalone real-time clock ICs designed for low-power applications. These components typically integrate a quartz oscillator and provide binary-coded decimal time data. The V8IZ suffix indicates specific voltage and packaging variations within the broader X1227 product line, tailored for industrial-grade temperature ranges and surface-mount assembly requirements.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Users should consult Renesas official resources for cross-reference recommendations or consider generic I2C RTC alternatives with compatible voltage and package specifications.

FAQ

What is the operating supply voltage range for the X1227V8IZ-4.5A?

The device operates with a main supply voltage between 4.5V and 5.5V.

Does the X1227V8IZ-4.5A support leap year calculations?

Yes, the component includes hardware logic for automatic leap year compensation.

What is the maximum current consumption of this RTC?

The typical current consumption ranges from 10µA to 20µA depending on the supply voltage.