X1227S8IZ-4.5A

Overview

The X1227S8IZ-4.5A is a Real-Time Clock (RTC) manufactured by Renesas Electronics Corporation, designed for precise timekeeping in electronic systems. It features an integrated I2C serial interface for communication and supports both 12-hour and 24-hour time formats alongside a YY-MM-DD-dd date format. The device includes hardware capabilities for alarm generation, leap year compensation, and power-fail monitoring. It operates within a supply voltage range of 1.8V to 5.5V on the main rail and 2.7V to 5.5V on the backup battery input, ensuring functionality across various industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Integrated I2C 2-wire serial interface for system communication
• Hardware support for alarms, leap year correction, and watchdog timer
• Dual power supply capability: 1.8V–5.5V VCC and 2.7V–5.5V VBAT
• Operational temperature range of -40°C to +85°C

Applications

• Industrial control systems requiring accurate time stamping
• Data logging equipment with power failure protection needs
• Embedded devices utilizing I2C bus architecture

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity upon receipt, as the unit utilizes an 8-SOIC surface-mount housing. Check manufacturing dates against current availability status, as this specific part number may be subject to end-of-life notices or discontinuation updates.

Selection Notes

Select this component when an I2C-compatible RTC with low-power standby modes is required. Ensure the system design accommodates the 1.8V minimum operating voltage for the main supply. Verify that the external circuitry supports the necessary pull-up resistors for the I2C bus lines and that the backup battery voltage falls within the specified 2.7V to 5.5V range for reliable operation.

Part Context

This model belongs to the X1227 series of real-time clocks from Renesas. It shares functional similarities with other variants in the family but is distinguished by its specific voltage thresholds and package configuration. The 'S8' suffix indicates the 8-pin SOIC package, while the '-4.5A' designation typically relates to specific manufacturing lot or revision codes rather than altering core electrical functions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineers should consult official Renesas lifecycle notices for potential obsolescence management strategies or cross-reference with newer generations of RTCs offering compatible pinouts and interfaces.