1337GCSRI8

Overview

The Renesas 1337GCSRI8 is a Real-Time Clock (RTC) integrated circuit featuring an I2C serial interface. It counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to 2100. The device operates within a voltage range of 1.8 V to 5.5 V and supports Industrial temperature ranges from -40°C to +85°C. It includes two programmable time-of-day alarms and a programmable square-wave output that defaults to 32 kHz on power-up. The component is packaged in an 8-pin MSOP format.

Feature Summary

• Provides accurate timekeeping with automatic date adjustment for varying month lengths and leap years.
• Supports I2C bus communication in Normal and Fast modes for address and data transfer.
• Includes two independent programmable time-of-day alarms for system event triggering.

Applications

• Embedded systems requiring precise real-time tracking
• Industrial equipment operating in wide temperature environments
• Consumer electronics utilizing low-power clock/calendar functions

Procurement Notes

Verify the specific suffix 'SRI8' to confirm the 8-pin MSOP package configuration and reel packaging type. Ensure compatibility with the required I2C voltage levels between 1.8 V and 5.5 V. Confirm that the industrial temperature rating meets the operational environment requirements. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a compact 8-pin footprint is required alongside standard I2C connectivity. It is suitable for designs needing built-in leap-year correction without external microcontroller intervention. Consider the 32 kHz default square-wave output if a periodic interrupt source is needed. Evaluate the 1.8 V to 5.5 V operating range against the system's available power rails.

Part Context

This part belongs to the 1337G series of low-power serial real-time clocks manufactured by Renesas Electronics. The series is designed to replace older RTC solutions by integrating crystal-less operation or supporting external crystals depending on the specific variant. It falls under the Clock & Timer ICs subcategory, specifically targeting applications requiring robust calendar functionality.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the available documentation. Verify pin-to-pin compatibility and register map alignment with any potential alternative devices before implementation.