1338C-31SRI8

Overview

The Renesas Electronics Corporation 1338C-31SRI8 is a Real-Time Clock (RTC) IC belonging to the 1339C series. It features an embedded crystal oscillator and communicates via a Fast mode I2C serial interface. The device counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to 2100. It includes two programmable time-of-day alarms, a programmable square-wave output, and an automatic power-fail detect and switch circuitry for battery backup. The component is housed in a 16-pin SOIC package.

Feature Summary

• Integrated Crystal: Features an embedded crystal oscillator within the 16-pin SOIC package.
• I2C Interface: Utilizes a Fast mode I2C serial bus for address and data transfer.
• Power Management: Includes automatic power-fail detection and switching to maintain time during outages.
• Alarm Functions: Provides two programmable time-of-day alarms and a programmable square-wave output.

Applications

• Wireless electronic game tables
• Smart three-phase electricity meters
• Smart single-phase electricity meters

Procurement Notes

The 1338C-31SRI8 is listed as End-of-Life (EOL) or discontinued by the manufacturer. Availability is restricted, and sourcing may require checking for obsolete stock or alternative distributors. Verify RoHS compliance status and moisture sensitivity levels before procurement planning.

Selection Notes

Select this component when a low-power RTC with an integrated crystal is required to minimize board space. Ensure compatibility with the Fast mode I2C interface and verify that the 16-pin SOIC package fits the design constraints. Consider the industrial temperature range (-40°C to +85°C) for environmental suitability.

Part Context

This part is part of the 1339C family of real-time clocks. It shares functional similarities with other variants in the series but is distinguished by its specific packaging and embedded crystal configuration. It serves as a clock/calendar solution for systems requiring precise timekeeping without external oscillators.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the part is discontinued, consult Renesas for current recommended replacements or evaluate similar RTCs with embedded crystals from other manufacturers if pin-compatible alternatives are needed.