X1227V8I-2.7A

Overview

The X1227V8I-2.7A is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, designed for precise timekeeping in electronic systems. It features an I2C, 2-Wire Serial interface for communication and supports both 12-hour and 24-hour time formats (HH:MM:SS). The device provides date tracking in YY-MM-DD-dd format and includes functional features such as alarms, leap year compensation, a supervisor, and a watchdog timer. It operates within a supply voltage range of 2.7V to 5.5V, with battery backup support from 1.8V to 5.5V. The maximum current consumption during timekeeping is specified between 10µA and 20µA at operating voltages of 2.7V to 5V. The component is housed in an 8-TSSOP package with a width of 0.173 inches (4.40mm) and is rated for an industrial operating temperature range of -40°C to 85°C.

Feature Summary

• Integrated real-time clock functionality with calendar capabilities including leap year adjustment
• Supports programmable alarm functions and system monitoring via supervisor and watchdog timer
• Utilizes standard I2C 2-wire serial interface for efficient data exchange
• Maintains timekeeping through low-power battery backup mode

Applications

• Industrial control systems requiring accurate timestamping
• Consumer electronics needing persistent timekeeping
• Embedded devices with power management requirements
• Data logging equipment

Procurement Notes

This component is listed as obsolete or not recommended for new designs. Verify availability through authorized distributors or secondary markets. Confirm that the specific suffix indicates the correct package variant. Ensure compatibility with existing board layouts before procurement due to potential end-of-life status.

Selection Notes

Select this part when a dedicated RTC with I2C interface and low standby current is required. Consider the 8-TSSOP package constraints and verify voltage levels match the system's main and backup power rails. Evaluate if the built-in supervisor and watchdog features meet system reliability needs without additional discrete components.

Part Context

The X1227 series represents Renesas' line of real-time clock ICs designed for general-purpose applications. This specific model integrates timekeeping, calendar, and system management functions into a single small-footprint package. It serves as a cost-effective solution for maintaining accurate time in battery-backed environments where space and power efficiency are critical design factors.

Replacement Considerations

Check for direct pin-to-pin replacements or functionally equivalent RTCs with I2C interfaces. Verify that alternative parts support similar voltage ranges and feature sets like alarms and watchdog timers. Consult manufacturer substitution guides for updated recommendations.