X1288S16-2.7AT1

Overview

The X1288S16-2.7AT1 is a Real Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock and calendar functions via an I²C, 2-Wire Serial interface. The device is housed in a 16-SOIC package with dimensions of 0.295 inches (7.50mm) width. It operates within a supply voltage range of 2.7V to 5.5V. The component supports date formats including YY-MM-DD-dd and time formats for both 12-hour and 24-hour cycles. It is designed for surface mount mounting types.

Feature Summary

• Integrated real-time clock and calendar functionality with leap year compensation
• Supports alarm capabilities and supervisor functions
• Includes watchdog timer features for system reliability
• Utilizes standard I²C two-wire serial communication interface

Applications

• General purpose timing and scheduling systems
• Data logging applications requiring accurate timestamping
• Embedded systems needing calendar maintenance
• Industrial control units with power loss protection requirements

Procurement Notes

Verify the exact suffix AT1 against official Renesas documentation to confirm tape and reel packaging specifications. Confirm that the 2.7V minimum operating voltage aligns with your system's power rail design. Check current production status as this specific part number may be obsolete or superseded by newer revisions. Ensure compatibility with your target I²C bus voltage levels before integration.

Selection Notes

Select this component when a dedicated RTC with EEPROM and supervisor functions is required in a 16-pin SOIC package. It is suitable for designs needing low-power timekeeping with battery backup support. Consider the 0°C to 70°C operating temperature range for environmental constraints. Evaluate if the I²C interface speed meets your system's data throughput needs compared to SPI alternatives.

Part Context

This part belongs to the X1288 series of Real Time Clocks from Renesas. The series typically combines RTC, EEPROM, and CPU supervisor functions into a single chip. The S16 designation indicates the 16-pin SOIC package variant. The 2.7 suffix denotes the minimum operating voltage threshold. This family is designed for cost-effective timing solutions in consumer and industrial electronics.

Replacement Considerations

Public sources indicate this product is no longer manufactured. Verify cross-reference lists in official Renesas databases for direct replacements. Consider the X1288V14Z-2.7 for similar functionality in a 14-TSSOP package if pinout compatibility allows. Always validate electrical parameters and pin assignments before substituting.