1337AGCSRGI

Overview

The Renesas 1337AGCSRGI is a low-power serial real-time clock (RTC) and calendar device. It tracks seconds, minutes, hours, day of the week, date, month, and year with automatic leap-year compensation valid through 2100. The component operates on an I2C serial interface supporting Normal and Fast modes. It features two programmable time-of-day alarms and a programmable square-wave output that defaults to 32 kHz upon power-up. The device supports operating voltages from 1.8 V to 5.5 V and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• I2C Serial Interface: Supports Normal mode (100 kHz) and Fast mode (400 kHz) data transfer rates for efficient communication with host processors.
• Calendar Functionality: Automatically adjusts for months with fewer than 31 days and includes leap-year correction logic valid up to the year 2100.
• Dual Alarms: Equipped with two independent time-of-day alarms that can be set to trigger interrupts at specific seconds, minutes, hours, or dates.
• Wide Voltage Operation: Designed for flexible system integration with an operating voltage range of 1.8 V to 5.5 V.

Applications

• Utility Meters
• HVAC Equipment
• Set-Top Boxes and Televisions

Procurement Notes

Verify the package type and suffix against official Renesas documentation, as the 'GCSR' designation may indicate specific tape-and-reel packaging or regional variants. Confirm RoHS compliance status directly with the manufacturer's current product status reports before finalizing procurement plans.

Selection Notes

Select this component when a cost-effective, low-power RTC with dual alarms is required for systems using I2C buses. Ensure the host microcontroller supports the required I2C speed modes. Verify that the 1.8 V to 5.5 V supply range aligns with the target system's power architecture and that the industrial temperature rating meets environmental constraints.

Part Context

This part belongs to the 1337G series of real-time clocks manufactured by Renesas Electronics. The series is functionally equivalent to legacy Maxim DS1337 devices, facilitating drop-in replacements in existing designs. The 1337AGCSRGI specifically denotes the industrial temperature grade variant packaged in an SOIC-8 format.

Replacement Considerations

The ISL12057 is a pin-compatible and functionally equivalent alternative from Renesas/Intersil. Designers should verify register compatibility and interrupt polarity settings when substituting components to ensure seamless integration without firmware modifications.