1337DCGI8

Overview

The Renesas 1337DCGI8 is a low-power serial real-time clock (RTC) IC featuring an I2C interface. It tracks seconds, minutes, hours, day, date, month, and year with automatic leap-year compensation valid up to the year 2100. The device supports both 12-hour and 24-hour time formats. It operates within a supply voltage range of 1.8 V to 5.5 V and 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.

Feature Summary

• I2C Serial Interface supporting Normal and Fast modes
• Automatic calendar adjustments including leap-year correction through 2100
• Two programmable time-of-day alarms
• Programmable square-wave output defaulting to 32 kHz

Applications

• General-purpose system control applications requiring precise timekeeping
• Battery-backed systems needing low-power RTC functionality
• Industrial equipment operating in extended temperature ranges

Procurement Notes

Verify the specific suffix 'DCGI8' against the manufacturer's current datasheet to confirm package type and temperature grade. Confirm availability status as distribution data may vary. Ensure the design accounts for the required external 32.768 kHz crystal oscillator if not integrated internally.

Selection Notes

Select this component when an I2C-compatible RTC with dual alarms and a fixed 32 kHz output is required. Verify that the 1.8 V to 5.5 V operating voltage aligns with the system's main supply. Check if the 8-pin SOIC package dimensions fit the PCB layout constraints compared to alternative packages like MSOP or QFN.

Part Context

This part belongs to the 1337G series of real-time clocks from Renesas Electronics. The series is characterized by low power consumption and compatibility with standard I2C buses. The 1337DCGI8 specifically denotes the SOIC-8 package variant within this family, designed for surface-mount assembly.

Replacement Considerations

Functionally equivalent parts include the Maxim DS1337. Verify pin compatibility and register mapping before substitution. Other members of the 1337G family with different packages (e.g., MSOP, QFN) may serve as physical replacements if electrical parameters match.