X1227V8IZ-2.7

Overview

The X1227V8IZ-2.7 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, belonging to the X1227 family. It provides clock/calendar functionality with an I²C interface and supports 12/24-hour time formats alongside YY-MM-DD-dd date formats. The device operates within a supply voltage range of 2.7V to 5.5V and features low power consumption, drawing 10µA to 20µA during timekeeping at 2.7V to 5V. It includes alarm capabilities, leap year compensation, a supervisor function, and a watchdog timer. The component is housed in an 8-SOIC package and is rated for operation between -40°C and 85°C.

Feature Summary

• Integrated Real-Time Clock with Calendar functionality supporting HH:MM:SS and YY-MM-DD-dd formats
• I²C (2-Wire Serial) interface for communication
• Built-in Alarm, Leap Year, Supervisor, and Watchdog Timer features
• Low current consumption of 10µA ~ 20µA @ 2.7V ~ 5V

Applications

• Data logging systems requiring precise timestamping
• Battery-backed real-time monitoring equipment
• Industrial control panels needing calendar functions
• Consumer electronics with scheduling requirements

Procurement Notes

Verify the exact part number against official Renesas documentation, as availability may vary due to product lifecycle status. Confirm package specifications and electrical parameters match system requirements before procurement. Check for obsolescence notices or end-of-life announcements from the manufacturer.

Selection Notes

Select this component when an I²C-connected RTC with integrated watchdog and supervisor features is required. Ensure the system voltage aligns with the 2.7V to 5.5V operating range. Consider the 8-SOIC package size for PCB layout constraints. Verify if the specific feature set (alarm, leap year) meets application needs compared to simpler RTC alternatives.

Part Context

The X1227 series represents Renesas' line of non-volatile real-time clocks designed for cost-sensitive applications requiring reliable timekeeping without external batteries for short durations. This model integrates standard RTC functions with additional system management features like watchdog timers, distinguishing it from basic timekeeping ICs.

Replacement Considerations

Check for direct pin-to-pin replacements within the X1227 family or compatible I²C RTCs from other manufacturers. Verify functional equivalence regarding voltage ranges, interface protocols, and package dimensions before substitution.