RV-3028-C8-32.768KHZ-1PPM-TA-QC

Real Time Clock Overview

The RV-3028-C8 is an ultra-small SMD Real-Time Clock Module integrating a CMOS circuit and a 32.768 kHz tuning fork crystal within a hermetically sealed ceramic package with a metal lid. It operates on a supply voltage of 1.1 V to 5.5 V, consuming 70 nA in timekeeping mode at 3 V. Factory calibrated to ±1 ppm at 25°C, it provides year, month, date, weekday, hours, minutes, seconds, and UNIX time via a 400 kHz I2C interface. The device includes 43 bytes of non-volatile user memory, 2 bytes of RAM, and supports automatic backup switchover.

Real Time Clock Feature Summary

• Extreme low power consumption: 70 nA @ 3 V
• Factory calibrated time accuracy of ±1 ppm at 25°C
• Integrated 43 bytes EEPROM and 2 bytes RAM
• Supports programmable clock outputs (32.768 kHz to 1 Hz)
• Automatic Backup Switchover and Trickle Charger function

Real Time Clock Applications

• IoT
• Metering
• Industrial
• Automotive
• Health Care
• Wearables, Portables

Real Time Clock Procurement Notes

Verify the specific ordering suffix for the requested model. The 'QC' suffix indicates Commercial Grade qualification, whereas 'QA' denotes Automotive Grade AEC-Q200 qualification. Confirm that the C8 package size (2.0 x 1.2 x 0.60 mm) matches the design requirements, as it differs from the C7 version despite having the same pinout.

Real Time Clock Selection Notes

Select this component for applications requiring minimal footprint and ultra-low power consumption. Ensure the system voltage remains within the 1.1 V to 5.5 V range. For automotive environments, verify if the QC grade is sufficient or if the QA grade is required. The device supports user-programmable password protection for write protection of time and configuration data.

Real Time Clock Part Context

The RV-3028-C8 belongs to the RV-3028 series of RTC modules from Micro Crystal AG. It shares the same function and pinout as the C7 version but utilizes a smaller package size of 2.0 x 1.2 x 0.60 mm. The module incorporates a tuning fork crystal operating under vacuum in a hermetically sealed ceramic package.

Real Time Clock Replacement Considerations

The RV-3028-C7 offers identical functionality and pinout but features a larger package size of 3.2 x 1.5 mm. Other RV-3028 variants may differ in package dimensions or qualification grades.