1339-2DCGI8

Overview

The Renesas Electronics Corporation 1339-2DCGI8 is a serial real-time clock (RTC) IC designed for low-power applications. It counts seconds, minutes, hours, day, date, month, and year with automatic leap-year compensation valid up to the year 2100. The device features an I2C serial interface for address and data transfer. It includes two programmable time-of-day alarms, a programmable square-wave output, and an oscillator stop flag. A built-in power-sense circuit detects power failures and automatically switches to a backup supply to maintain timekeeping. The component operates within an industrial temperature range of -40°C to +85°C.

Feature Summary

• I2C Serial Interface: Supports fast mode I2C communication for efficient data transfer.
• Automatic Calendar Adjustment: Handles variable month lengths and leap years automatically.
• Dual Alarms: Equipped with two programmable time-of-day alarm functions.
• Power-Fail Detection: Integrated circuitry detects power loss and switches to backup supply seamlessly.

Applications

• Smart metering systems requiring precise timekeeping
• Wireless gaming tables and interactive displays
• Industrial equipment with I2C bus architectures

Procurement Notes

Verify component authenticity through authorized channels due to potential availability constraints. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Check for end-of-life notifications or product change notices that may affect long-term supply stability.

Selection Notes

Select this RTC when an I2C interface is required for system integration. Ensure the design accommodates the specified voltage ranges and industrial temperature limits. Verify that the package type matches the PCB footprint requirements before finalizing the bill of materials.

Part Context

This part belongs to the 1339 series of serial real-time clocks from Renesas Electronics. It shares functional similarities with other variants in the family but differs in packaging and specific electrical characteristics. The 1339 series is widely used in embedded systems requiring reliable calendar and timekeeping functions.

Replacement Considerations

Consult official documentation for direct pin-to-pin substitutes. Cross-reference with other 1339 series variants if package compatibility allows. Verify electrical parameter alignment before considering alternative manufacturers.