X1288V14Z-2.7T1

Overview

The X1288V14Z-2.7T1 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, housed in a 14-TSSOP surface-mount package. It provides clock/calendar functionality via an I²C and 2-wire serial interface. The device operates on a supply voltage range of 2.7V to 5.5V, with battery backup support from 1.8V to 5.5V. Key features include alarm capabilities, leap year compensation, a supervisor function, and a watchdog timer. Time format supports HH:MM:SS in both 12-hour and 24-hour modes, while date format is YY-MM-DD-dd. The typical timekeeping current is 10µA to 20µA at the specified voltage range.

Feature Summary

• Integrated Real-Time Clock with Calendar functionality
• I²C and 2-Wire Serial Interface for communication
• Built-in Alarm, Leap Year, Supervisor, and Watchdog Timer features
• Low power consumption with 10µA–20µA timekeeping current

Applications

• Data logging systems requiring precise timestamping
• Consumer electronics needing calendar and timekeeping functions
• Industrial equipment with watchdog timer requirements
• Battery-powered devices utilizing low standby current

Procurement Notes

This component is classified as Obsolete by the manufacturer. Verification of availability should focus on surplus distributors or secondary market sources rather than direct manufacturing channels. Ensure compatibility with existing PCB footprints and firmware drivers before procurement, as replacement components may require design adjustments.

Selection Notes

Select this part when a non-volatile RTC with I²C interface and additional system management features like watchdog timers are required. Verify that the operating temperature range meets application needs, as datasheet variations exist between tube and tape-and-reel packaging regarding temperature specs. Confirm voltage levels align with the 2.7V–5.5V supply requirement.

Part Context

The X1288 series belongs to Renesas' portfolio of real-time clock ICs designed for general-purpose timing applications. The 'V14' suffix indicates the 14-pin TSSOP package, while 'Z-2.7' typically denotes the voltage range and lead-free status. This specific model is part of a legacy product line now marked as obsolete, often succeeded by newer generations with enhanced integration or lower power profiles.

Replacement Considerations

Direct pin-to-pin replacements may be limited due to the obsolete status. Evaluate newer Renesas RTC models or competitors offering I²C interfaces and similar feature sets (alarm, watchdog). Verify package compatibility (14-TSSOP) and electrical parameters such as supply voltage and current consumption during selection.