1339AC-2SRGI8

Overview

The Renesas 1339AC-2SRGI8 is a low-power serial real-time clock (RTC) IC featuring an I2C interface. It counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to the year 2100. The device includes two programmable time-of-day alarms and a programmable square-wave output. It is packaged in an 8-TSSOP or 8-SOIC form factor.

Feature Summary

• Serial I2C interface for system communication
• Automatic leap-year compensation through 2100
• Dual programmable time-of-day alarms
• Programmable square-wave output capability

Applications

• General purpose clock/calendar systems
• Data logging timestamping
• Embedded systems requiring precise timekeeping

Procurement Notes

Verify the specific package variant (TSSOP vs SOIC) against the datasheet revision. Confirm I2C address settings and alarm configuration requirements for the target application. Ensure supply chain availability aligns with project timelines as component status may vary.

Selection Notes

Select this RTC for applications requiring low power consumption and simple serial connectivity. Consider the 8-pin package constraints for board space. Evaluate if the built-in leap-year logic meets long-term deployment needs without external calculation overhead.

Part Context

This component belongs to the Renesas 1339 series of real-time clocks. It provides essential timekeeping functions via a standard serial interface, serving as a reliable timing source for microcontroller-based designs where battery backup and accuracy are prioritized.

Replacement Considerations

Check for direct pin-compatible substitutes within the same Renesas family. Verify interface compatibility and parameter equivalence before substituting with other manufacturers' RTCs.