1337DVGI

Overview

The Renesas 1337DVGI is a low-power serial real-time clock (RTC) device featuring an I2C serial interface. It counts seconds, minutes, hours, day, date, month, and year with automatic leap-year compensation valid up to the year 2100. The device supports both 24-hour and 12-hour formats with AM/PM indicators. Key electrical parameters include an operating voltage range of 1.8 V to 5.5 V and an industrial temperature range of -40°C to +85°C. It includes two programmable time-of-day alarms and a programmable square-wave output that defaults to 32 kHz upon power-up.

Feature Summary

• I2C Serial Interface supporting Normal and Fast modes for address and data transfer
• Automatic date adjustment for months with fewer than 31 days and leap years
• Two programmable time-of-day alarms and an oscillator stop flag
• Programmable square-wave output defaulting to 32 kHz on power-up

Applications

• General purpose system control applications requiring precise timekeeping
• Embedded systems needing low-power RTC functionality
• Industrial equipment operating within -40°C to +85°C environments

Procurement Notes

Verify the specific suffix 'D' against official Renesas documentation to confirm package type and temperature grade. Confirm RoHS compliance status via the manufacturer's current datasheet. Check for moisture sensitivity level requirements during storage and handling. Ensure I2C bus compatibility with the host controller before integration.

Selection Notes

Select this component when an external crystal is not integrated and the design requires a separate 32 kHz oscillator connection. Verify that the target application operates within the 1.8 V to 5.5 V supply range. Consider the MSOP-8 or SOIC-8 package availability based on board space constraints. Ensure the system supports I2C communication protocols for register access.

Part Context

The 1337DVGI belongs to the IDT/Renesas 1337G family of real-time clocks. This series offers various packaging options including 8-pin MSOP, 8-pin SOIC, and 16-pin QFN/SOIC variants. The 'DVGI' suffix typically denotes a specific package style and temperature rating within this product line, distinguishing it from parts with integrated crystals or different pin configurations.

Replacement Considerations

Direct substitutes within the same family include other 1337G variants such as 1337AGDVGI or 1337BGDVGI, provided package and electrical specifications match. Cross-reference tools may identify parametrically similar RTCs, but functional verification of I2C registers and alarm features is required.