X1288S16-4.5AT1

Overview

The X1288S16-4.5AT1 is a Real-Time Clock (RTC) IC manufactured by Renesas Electronics Corporation, formerly Intersil. It integrates a clock/calendar function with 32KB of EEPROM and SRAM memory. The device communicates via an I2C, 2-wire serial interface and 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, Y2K compliance, and a watchdog timer. It is housed in a 14-TSSOP package and supports data formats including YY-MM-DD-dd and HH:MM:SS:hh.

Feature Summary

• Integrated 32KB EEPROM and SRAM memory alongside RTC functionality
• I2C, 2-wire serial interface for system communication
• Supports alarm, watchdog timer, and leap year correction
• Operates at 4.5V ~ 5.5V VCC and 1.8V ~ 5.5V VBAT

Applications

• Data logging systems requiring persistent time and storage
• Industrial control units needing watchdog protection
• Embedded systems with I2C bus architecture

Procurement Notes

Verify the manufacturer designation as Renesas Electronics Corporation or Intersil on official datasheets. Confirm the specific suffix 'T1' indicates tape and reel packaging if required for assembly. Ensure compatibility with the 4.5V to 5.5V operating voltage range before integration into the target circuit design.

Selection Notes

Select this component when a combined RTC and non-volatile memory solution is required on a single I2C bus. The 32KB capacity suits applications needing significant data retention alongside timekeeping. Verify that the system voltage aligns with the 4.5V minimum requirement for VCC operation.

Part Context

This part belongs to the X1288 series of real-time clock and calendar ICs. The series typically combines timekeeping with substantial EEPROM storage. The manufacturer transitioned from Intersil to Renesas Electronics Corporation during industry consolidation, affecting branding but maintaining technical specifications.

Replacement Considerations

Check for direct cross-references from Renesas or Intersil legacy product lists. Verify pinout compatibility with existing 14-TSSOP footprints. Ensure substitute parts support the same I2C protocol and voltage ranges.