1337GDVGI

Overview

The Renesas 1337GDVGI is a low-power serial real-time clock (RTC) device belonging to the 1337G series. It counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to the year 2100. The device features an I2C serial interface supporting Normal and Fast modes for address and data transfer. It includes two programmable time-of-day alarms and a programmable square-wave output that defaults to 32 kHz upon power-up. The oscillator stop flag indicates loss of main power. Operating voltage ranges from 1.8 V to 5.5 V, and it supports industrial temperature applications from -40°C to +85°C.

Feature Summary

• I2C Serial Interface: Supports Normal mode (up to 100 kHz) and Fast mode (up to 400 kHz).
• Calendar Functionality: Automatically adjusts for months with fewer than 31 days and leap years through 2100.
• Alarm System: Equipped with two independent programmable time-of-day alarms.
• Square-Wave Output: Programmable output frequency defaulting to 32 kHz at power-up.
• Oscillator Stop Flag: Detects when the main power supply fails and the backup battery takes over.

Applications

• Industrial control systems requiring precise timekeeping in harsh environments.
• Consumer electronics needing low-power RTC solutions.
• Data logging devices where calendar accuracy is critical.
• Embedded systems utilizing I2C communication buses.

Procurement Notes

Verify component authenticity through authorized Renesas distributors or direct channels. Confirm RoHS compliance status via official documentation before integration. Check current availability as supply may be limited or subject to factory special orders. Ensure proper handling for moisture-sensitive devices during storage and assembly processes.

Selection Notes

Select this part for designs requiring a standalone RTC with I2C connectivity. Verify that the system voltage falls within the 1.8 V to 5.5 V operating range. Consider the TSSOP-8 package dimensions for PCB layout constraints. Ensure external crystal requirements are met if not using the integrated variant options available in the broader 1337G family.

Part Context

The 1337GDVGI is part of the Renesas 1337G series of real-time clocks. This series offers various packaging options including MSOP, SOIC, QFN, and SOIC with integrated crystals. The 'GD' suffix typically denotes specific package and temperature grade characteristics within the product line. It serves as a general-purpose timing solution for microcontroller-based systems.

Replacement Considerations

Direct substitutes include other parts within the IDT/Renesas 1337G family such as those with different package types (e.g., MSOP or SOIC) but identical functionality. Cross-reference pinouts and electrical specifications carefully when considering alternative RTC ICs from other manufacturers.