X1288V14-4.5AT1

Overview

The X1288V14-4.5AT1 is a Real-Time Clock (RTC) and calendar integrated circuit manufactured by Renesas Electronics Corporation, belonging to the X1288 series. It provides timekeeping functions with an I²C interface and supports both 12-hour and 24-hour formats. The device operates within a supply voltage range of 4.5V to 5.5V for main power and 1.8V to 5.5V for battery backup. Key features include alarm capabilities, leap year compensation, a supervisor function, and a watchdog timer. It is housed in a 14-TSSOP package and is designed for surface mount installation.

Feature Summary

• Integrated Real-Time Clock and Calendar with YY-MM-DD-dd date format
• I²C serial interface for communication
• Built-in Alarm, Leap Year correction, Supervisor, and Watchdog Timer
• Dual supply capability: 4.5V–5.5V VCC and 1.8V–5.5V Battery Backup

Applications

• Industrial control systems requiring precise timekeeping
• Consumer electronics with data logging needs
• Automotive infotainment and monitoring systems

Procurement Notes

This component is classified as Obsolete. Availability is limited to existing stock or last-time buy scenarios through authorized distributors. Verify specific lot dates and authenticity when sourcing from secondary markets due to end-of-life status.

Selection Notes

Select this part if a 5V logic interface is required for the I²C bus. Ensure the application environment stays within the 0°C to 70°C operating temperature range. Consider the X1288V14Z variant if a tube package is preferred over tape-and-reel, noting that both share similar electrical characteristics.

Part Context

The X1288V14-4.5AT1 is part of the broader X1288 family of RTCs. It shares core functionality with variants like the X1288V14Z but differs in packaging and specific voltage tolerances. It serves as a legacy solution for applications transitioning from discrete clock circuits to integrated RTCs.

Replacement Considerations

Direct pin-to-pin replacements may be limited due to the obsolete status. Evaluate the X1288V14Z for functional equivalence, though package differences exist. New designs should consider modern alternatives with lower power consumption and wider voltage ranges.