X1288V14Z-4.5A

Overview

The X1288V14Z-4.5A is a Real-Time Clock (RTC) and calendar device manufactured by Renesas Electronics Corporation, housed in a 14-TSSOP surface-mount package. It operates with a supply voltage range of 4.5V to 5.5V and supports I²C and 2-Wire Serial interfaces for data communication. The component provides timekeeping capabilities including hours, minutes, seconds, days, dates, months, and years, with automatic leap year compensation up to 2100. Key features include an alarm function, a watchdog timer, and a supervisor circuit. The device is designed for applications requiring precise time tracking within standard industrial temperature ranges.

Feature Summary

• Integrated Real-Time Clock with Calendar functionality supporting YY-MM-DD-dd format
• Dual interface support: I²C and 2-Wire Serial communication protocols
• Built-in Watchdog Timer and Supervisor circuit for system reliability
• Automatic Leap Year Compensation valid until the year 2100

Applications

• Industrial control systems requiring precise timestamping
• Consumer electronics with real-time clock dependencies
• Data logging equipment needing accurate date/time records

Procurement Notes

Verify the specific suffix '4.5A' against official Renesas documentation to confirm if it denotes a specific tape-and-reel quantity or packaging variant, as standard datasheets may list generic suffixes like 'Z'. Confirm current product status, as the base X1288 series has been marked obsolete in some distributor databases. Ensure compatibility with 4.5V–5.5V logic levels before integration.

Selection Notes

Select this component when a dedicated RTC with integrated supervisor and watchdog functions is required in a small 14-pin package. It is suitable for designs operating strictly on 5V logic rails. For lower voltage applications (down to 1.8V), consider alternative models from the same family that support wider input ranges. Verify I²C address configuration requirements against system bus constraints.

Part Context

The X1288 belongs to a family of RTCs combining timekeeping with non-volatile memory management. It serves as a standalone timing solution without requiring external crystals in some configurations, though external components may be needed depending on the specific board design and accuracy requirements. It complements microcontrollers by offloading time-critical tasks.

Replacement Considerations

Check for direct pin-compatible replacements within the X1288 series or newer Renesas RTC offerings. Verify if the 'Obsolete' status of the base model impacts long-term availability. Ensure substitute parts maintain the same 14-TSSOP footprint and interface compatibility.