RV-3028-C7 32.768KHZ 1PPM-TA-QA

Real Time Clock Overview

The RV-3028-C7 is a hermetically sealed SMD Real-Time Clock module integrating CMOS circuitry and a 32.768 kHz quartz crystal within an 8-WCDFN package (3.2 x 1.5 x 0.8 mm). It operates on a supply voltage of 1.1 V to 5.5 V with a typical timekeeping current consumption of 45 nA at 3 V. Factory calibrated for ±1 ppm accuracy at 25°C, the device features an I2C interface supporting up to 400 kHz. Key functionalities include automatic backup switchover, trickle charging capabilities, programmable alarms, timers, external event timestamping, and 43 bytes of non-volatile user EEPROM.

Real Time Clock Feature Summary

• Extreme low power consumption of 45 nA @ 3 V in timekeeping mode
• Factory calibrated time accuracy of ±1 ppm at 25°C
• Integrated battery backup switch with trickle charger function
• Supports 400 kHz I2C bus interface and programmable clock outputs

Real Time Clock Applications

• IoT devices
• Metering systems
• Industrial equipment
• Automotive electronics
• Health care devices
• Wearables and portables

Real Time Clock Procurement Notes

Verify automotive qualification status by confirming the 'QA' suffix in the part number, which denotes AEC-Q200 compliance. Ensure the ordering quantity matches the specified tape and reel packaging options, such as 1,000 or 3,000 pieces per 7-inch reel. Confirm that the selected variant aligns with the required temperature range and package dimensions for the target PCB layout.

Real Time Clock Selection Notes

Select this module when ultra-low power consumption and high precision are critical. The integrated crystal eliminates the need for external components, simplifying design. Verify that the system voltage falls within the 1.1 V to 5.5 V operating range. Consider the 43-byte EEPROM capacity for data storage needs and ensure the I2C address conflicts are resolved if multiple RTCs are used.

Real Time Clock Part Context

This component belongs to the RV-3028 series of real-time clock modules from Micro Crystal AG. The C7 designation refers to the specific 3.2 x 1.5 x 0.8 mm ceramic package size. The TA suffix indicates a standard operating temperature range of -40°C to +85°C. This model represents a specialized solution for space-constrained applications requiring long-term battery life without calibration.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Micro Crystal AG directly for cross-reference recommendations or evaluate other models within the RV-3028 family based on specific performance requirements.