X1227S8I-2.7A

Overview

The X1227S8I-2.7A is a Real-Time Clock (RTC) IC manufactured by Renesas Electronics Corporation, belonging to the X1227 series. It provides clock/calendar functionality with alarm capabilities and leap year compensation. The device supports I2C and 2-wire serial interfaces for data communication. It operates within a supply voltage range of 2.7V to 5.5V, with battery backup support from 1.8V to 5.5V. The time format supports both 12-hour and 24-hour modes (HH:MM:SS), while the date format is YY-MM-DD-dd. Key features include an alarm function, leap year adjustment, a watchdog timer, and a monitor timer. The component is housed in an 8-SOIC package (0.154 inch / 3.90mm width) and is rated for an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrated Real-Time Clock (RTC) with calendar and alarm functions
• Supports I2C and 2-wire serial communication interfaces
• Includes watchdog timer and monitor timer for system reliability
• Operates on 2.7V to 5.5V supply with 1.8V to 5.5V battery backup

Applications

• Industrial control systems requiring precise timekeeping
• Consumer electronics with battery-backed real-time clock needs
• Automotive infotainment and monitoring systems
• IoT devices needing low-power time synchronization

Procurement Notes

Verify the exact suffix '2.7A' against official Renesas documentation, as standard listings often show 'X1227S8IZ-2.7'. Confirm RoHS compliance status, as some variants may not meet current standards. Check for obsolescence notices, as this part number family has seen discontinuation updates. Ensure the 8-SOIC package matches your PCB footprint requirements.

Selection Notes

Select this RTC if I2C or 2-wire interface compatibility is required. Ensure the 8-SOIC package fits your design constraints. Verify that the 2.7V minimum supply voltage aligns with your system's power rails. Consider the X1228 series for higher pin counts or additional features if needed.

Part Context

The X1227 series is part of Renesas' portfolio of non-volatile RAM and RTC solutions. These components are designed for applications requiring reliable timekeeping and data retention. The X1227 specifically focuses on compact RTC functionality with minimal external components.

Replacement Considerations

Check for direct replacements like the X1227S8IZ-2.7. For pin-compatible alternatives, consider the X1228 series if more pins are available. Verify electrical parameters match before substitution.