X1288V14I-2.7AT1

Overview

The X1288V14I-2.7AT1 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation, part of the X1288 base product family. It provides clock/calendar functionality via an I2C or 2-Wire Serial interface. The device operates on a main supply voltage of 2.7V to 5.5V and supports a battery backup supply of 1.8V to 5.5V. It features non-volatile memory for timekeeping with a maximum current consumption of 10µA to 20µA at 2.7V to 5V. The component is housed in a 14-TSSOP package with a width of 4.40mm and is rated for commercial temperature ranges.

Feature Summary

• Integrated Real-Time Clock with Calendar supporting HH:MM:SS:hh time format and YY-MM-DD-dd date format
• Includes hardware features such as Alarm, Leap Year compensation, Supervisor, and Watchdog Timer
• Low power consumption with dedicated battery supply range of 1.8V ~ 5.5V
• Non-volatile memory retains time data during power loss

Applications

• Systems requiring precise timekeeping and calendar functions
• Devices needing alarm capabilities and watchdog timer supervision
• Battery-backed real-time clock applications in consumer electronics

Procurement Notes

This component is classified as Obsolete by the manufacturer. Verification of availability should focus on surplus distributors or secondary markets. Confirm RoHS compliance status, as specific variants may differ; the source data indicates non-compliance for this specific suffix configuration. Ensure the 14-TSSOP package dimensions match the target PCB footprint.

Selection Notes

Select this part when an I2C-connected RTC with integrated supervisor and watchdog features is required. Verify that the operating temperature range of -40°C to 85°C meets system requirements. Compare against the X1228 series if different pinouts or feature sets are needed. Ensure the I2C address configuration aligns with the system bus design.

Part Context

The X1288V14I-2.7AT1 belongs to the X1288 family of real-time clocks from Renesas. It shares functional similarities with the X1228 but includes specific timing formats and feature sets like the watchdog timer. The 'V14' indicates the 14-pin TSSOP package, 'I' denotes the industrial/commercial temperature grade, and '2.7AT1' specifies the voltage range and tape-and-reel packaging.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consider reviewing the X1228V14IZ-2.7A datasheet for potential functional overlaps, though pin compatibility and feature differences must be verified against official specifications.