X1227V8I-2.7

Overview

The X1227V8I-2.7 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, housed in an 8-TSSOP package with a width of 4.40mm. It provides clock/calendar functionality via I2C and 2-Wire Serial interfaces, supporting HH:MM:SS time formats in both 12-hour and 24-hour modes, alongside YY-MM-DD-dd date formatting. The device operates within a supply voltage range of 2.7V to 5.5V, with battery backup support from 1.8V to 5.5V. Timekeeping current consumption ranges from 10µA to 20µA at 2.7V to 5V. It features alarms, leap year correction, a supervisor function, and a watchdog timer, operating across a temperature range of -40°C to 85°C.

Feature Summary

• Integrates real-time clock and calendar functions with alarm capabilities and leap year adjustment.
• Includes CPU supervisor and watchdog timer for system monitoring and reset management.
• Supports dual communication protocols including I2C and 2-Wire Serial interfaces.

Applications

• Embedded systems requiring precise timekeeping and calendar tracking
• Industrial control units needing watchdog timer protection
• Consumer electronics utilizing low-power RTC solutions

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential counterfeiting risks. Confirm the specific suffix 'I' indicates industrial temperature grade (-40°C to 85°C) and '2.7' denotes the minimum operating voltage. Check for RoHS compliance status as historical data may vary. Ensure packaging matches the 8-TSSOP specification. Request batch-specific documentation to validate manufacturing origin and quality certifications prior to final procurement decisions.

Selection Notes

Select this component when a compact RTC solution with integrated supervision is required. The 8-TSSOP package suits space-constrained designs. Verify interface compatibility with the host microcontroller for either I2C or 2-Wire Serial operation. Consider the low standby current for battery-backed applications. Ensure the operating temperature range meets environmental requirements. Evaluate if the built-in watchdog and supervisor functions eliminate the need for external components, simplifying the bill of materials.

Part Context

This part belongs to the X1227 series of real-time clocks from Renesas, designed for general-purpose timing applications. It complements other variants like the X1227S8IZ-2.7 and X1227V8I-2.7A, differing primarily in package type and minor electrical characteristics. The series targets cost-sensitive embedded markets requiring reliable timekeeping without complex external circuitry.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Renesas lifecycle notices for end-of-life alternatives or cross-reference with similar RTC ICs offering compatible pinouts and interface protocols.