1337GDCGI8

Overview

The Renesas 1337GDCGI8 is a low-power serial real-time clock (RTC) IC from the 1337G series, manufactured by Renesas Electronics. It provides timekeeping for seconds, minutes, hours, day, date, month, and year with automatic leap-year compensation valid up to the year 2100. The device operates on an I2C serial interface supporting Normal and Fast modes and functions within a supply voltage range of 1.8 V to 5.5 V. It includes two programmable time-of-day alarms and a programmable square-wave output that defaults to 32 kHz upon power-up. The component is housed in an 8-pin SOIC package and supports industrial temperature ranges.

Feature Summary

• I2C Serial Interface: Supports Normal and Fast modes for address and data transfer.
• Automatic Date Adjustment: Corrects for months with fewer than 31 days and leap years up to 2100.
• Dual Alarms: Features two programmable time-of-day alarms.
• Square-Wave Output: Programmable output defaulting to 32 kHz at power-up.

Applications

• General-purpose embedded systems requiring precise timekeeping.
• Industrial equipment operating within -40°C to +85°C environments.
• Consumer electronics utilizing I2C communication protocols.

Procurement Notes

Verify the specific suffix 'CGI8' against official Renesas documentation to confirm package type and environmental compliance details. Factory packaging quantities may vary; consult current distributor catalogs for reel or cut-tape availability. Ensure compatibility with system voltage levels between 1.8 V and 5.5 V before integration.

Selection Notes

Select this component when a low-power RTC with I2C connectivity is required. It is suitable for designs needing automatic calendar calculations without external microcontroller intervention. Verify that the 8-pin SOIC package fits the board layout constraints and that the operating temperature range meets the application's environmental requirements.

Part Context

The 1337GDCGI8 belongs to the Renesas 1337G family of real-time clocks. This series offers various package options including MSOP, SOIC, and QFN configurations. The device integrates oscillator functionality but requires an external crystal if not using the specific variant with an integrated crystal, though standard SOIC packages typically require external components for the clock source.

Replacement Considerations

Cross-reference with other 1337G series variants such as 1337GDVGI8 for different package types like TSSOP-8. Ensure pinout compatibility and electrical specifications match before substituting. Verify that any alternative maintains the same I2C interface and voltage operating range.