1339BC-31SRGI

Overview

The 1339BC-31SRGI is a Real-Time Clock (RTC) manufactured by Renesas Electronics Corporation. It provides timekeeping functions including seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to the year 2100. The device features an embedded crystal oscillator and utilizes a Fast mode I2C serial interface for data transfer. It supports both 12-hour and 24-hour time formats with AM/PM indicators. The component includes two programmable time-of-day alarms and a programmable square-wave output. An automatic power-fail detect and switch circuit ensures continuous operation during power transitions.

Feature Summary

• Integrated real-time clock with calendar functionality and leap-year correction
• Embedded crystal oscillator eliminates external components
• Automatic power-fail detection and backup supply switching
• Fast mode I2C serial interface for address and data transfer

Applications

• Wireless gaming tables requiring precise timing synchronization
• Smart three-phase electricity meters with bidirectional communication
• Smart single-phase electricity meters with tamper detection capabilities

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential counterfeit risks. Confirm RoHS compliance status as indicated in official documentation. Check for specific moisture sensitivity level requirements during storage and handling. Ensure the package type matches the intended PCB footprint design constraints before finalizing procurement orders.

Selection Notes

Select this component when a low-power RTC with integrated crystal is required for industrial applications. Consider the operating temperature range of -40°C to +85°C for environmental suitability. Evaluate the need for dual alarms and square-wave outputs against system timing requirements. Verify voltage supply compatibility with the target circuit design specifications.

Part Context

This part belongs to the 1339 series of serial real-time clocks from Renesas Electronics. The series is designed for low-power clock and date applications using an I2C bus interface. These devices are commonly utilized in metering systems and electronic equipment requiring accurate timekeeping with minimal external component count.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.