1339A-31DVGI

Overview

The Renesas Electronics Corporation 1339A-31DVGI is a Real-Time Clock (RTC) IC featuring a serial I2C interface. It counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to the year 2100. The device operates within a supply voltage range of 1.3 V to 3.7 V and supports both 12-hour and 24-hour time formats. It is housed in an 8-pin TSSOP package and includes battery backup switching functionality for continuous operation during power loss.

Feature Summary

• Integrates a real-time clock capable of tracking seconds through years with automatic leap-year compensation valid until 2100
• Utilizes a standard two-wire serial I2C bus interface for communication
• Incorporates hardware-based battery backup switching to maintain timekeeping during main power failure

Applications

• Data logging systems requiring precise timestamping
• Consumer electronics needing calendar and time functions
• Industrial control units with low-power standby requirements

Procurement Notes

Verify the specific suffix 'A' against official Renesas documentation to confirm component revision and electrical characteristics. Ensure the selected package variant matches the required PCB footprint. Confirm that the I2C address and voltage levels are compatible with the host microcontroller system before finalizing procurement.

Selection Notes

Select this component when a dedicated RTC with integrated leap-year logic is required. The I2C interface simplifies board layout compared to parallel interfaces. Consider the 1.3 V minimum operating voltage for compatibility with low-voltage digital systems. Verify that the TSSOP-8 package dimensions fit the available space constraints on the target design.

Part Context

This part belongs to the Renesas 1339 series of real-time clocks. These devices are designed to provide accurate time and date information to embedded systems. The series typically offers low power consumption and reliable performance across industrial temperature ranges, serving as a critical timing reference for data integrity in various electronic applications.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Generic RTCs may lack the specific leap-year compensation or battery switching features found in this model.