RV-3129-C3-32.768KHZ-OPTION-A-TA-QC-T3

Real Time Clock Overview

The RV-3129-C3 is a hermetically sealed SMT Real-Time Clock Module integrating a CMOS circuit and a 32.768 kHz tuning fork crystal within a miniature ceramic package (3.7 x 2.5 x 0.9 mm). It operates on an I²C bus interface with a maximum clock frequency of 400 kHz. The device provides timekeeping for year, month, weekday, date, hours, minutes, and seconds, alongside timer and alarm functions. Electrical specifications include a supply voltage range of 1.3 V to 5.5 V and a typical current consumption of 800 nA at 3 V during timekeeping mode.

Real Time Clock Feature Summary

• Time accuracy of ±6 ppm from -40°C to +85°C (Option A) with automatic temperature compensation.
• Integrated 2 bytes non-volatile user EEPROM and 8 bytes user RAM.
• Automatic backup switchover and trickle charger function for continuous operation.
• Programmable clock output frequencies: 32.768 kHz, 1024 Hz, 32 Hz, and 1 Hz.

Real Time Clock Applications

• IoT devices
• Metering systems
• Industrial equipment
• Portable electronics
• Automotive applications

Real Time Clock Procurement Notes

Verify the specific ordering suffixes against the manufacturer's datasheet to ensure correct configuration. The suffix 'TA' indicates a standard operating temperature range of -40°C to +85°C, while 'QC' denotes Commercial Grade qualification. Confirm that the required automotive qualification (AEC-Q200) corresponds to the 'QA' suffix if needed for the target application environment.

Real Time Clock Selection Notes

Select Option A for high precision requirements (±6 ppm) or Option B for lower cost applications (±25 ppm). Ensure the system design accommodates the extended temperature range up to +125°C if utilizing the TB suffix variant. Verify that the I²C bus voltage levels are compatible with the 1.3 V to 5.5 V supply range and that the package dimensions fit the PCB layout constraints.

Real Time Clock Part Context

This component belongs to the RV-3129-C3 series of real-time clock modules manufactured by Micro Crystal AG. These modules are designed to replace traditional discrete RTC solutions by combining the oscillator and IC in a single surface-mount package. The series supports various temperature ranges and accuracy options to suit different industrial and consumer electronic needs.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. When evaluating alternatives, verify compatibility with the 10-pin SON package dimensions and I²C interface protocols. Ensure replacement components meet the same hermetic sealing and vacuum operation requirements for the internal crystal resonator.

Real Time Clock FAQ

What is the power consumption of the RV-3129-C3 during timekeeping?

The typical current consumption is 800 nA at 3 V when the I²C bus is inactive and the device is in timekeeping mode.

How does the device handle power loss?

The module features an automatic backup switchover function and a trickle charger, allowing it to switch seamlessly to a backup supply voltage (VBACKUP) to maintain timekeeping.

What memory resources are available for user data?

The RV-3129-C3 includes 2 bytes of non-volatile user EEPROM and 8 bytes of user RAM for storing application-specific data.