RV-3129-C3-32.768KHZ-OPTION-A-TB-QC

Real Time Clock Overview

The RV-3129-C3-32.768KHZ-OPTION-A-TB-QC is a hermetically sealed SMT Real-Time Clock Module by Micro Crystal AG, integrating a CMOS circuit with a 32.768 kHz tuning fork crystal in a 3.7 x 2.5 x 0.9 mm ceramic package. It operates on a supply voltage of 1.3 V to 5.5 V, consuming 800 nA at 3 V during timekeeping. The module provides year, month, weekday, date, hours, minutes, and seconds via an I²C-bus interface (400 kHz). It features automatic backup switchover, trickle charging, and temperature-compensated time accuracy of ±6 ppm from -40°C to +85°C.

Real Time Clock Feature Summary

• Hermetically sealed ceramic package with metal lid connected to VSS for vacuum operation.
• Time accuracy of ±6 ppm (Option A) across the -40°C to +85°C range.
• Extended operating temperature range up to +125°C (TB suffix).
• Includes 2 bytes non-volatile user memory (EEPROM) and 8 bytes user RAM.

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 official datasheet to ensure correct qualification and temperature ratings. The 'QC' suffix indicates Commercial Grade standard, while 'QA' denotes Automotive Grade AEC-Q200 qualification. Confirm that the TB suffix matches the required extended temperature range of -40°C to +125°C for the target application environment.

Real Time Clock Selection Notes

Select Option A for higher time accuracy (±6 ppm) compared to Option B (±25 ppm) within the standard temperature range. Ensure the supply voltage remains above 2.1 V if thermometric functions are active. Verify compatibility with the 12 mm tape and reel packaging format for automated assembly processes.

Real Time Clock Part Context

This component belongs to the RV-3129-C3 series of Real-Time Clock Modules. The C3 designation refers to the specific miniature package dimensions of 3.7 x 2.5 x 0.9 mm. The series integrates the oscillator and RTC logic into a single SMD ceramic unit, distinguishing it from discrete crystal and IC combinations.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Replacement requires matching the I²C interface, package dimensions, and electrical specifications of the original RV-3129-C3 model.

Real Time Clock FAQ

What is the function of Pin 6?

Pin 6 is VSS (Ground). The metal lid of the ceramic package is also connected to this pin.

What clock output frequencies are supported?

The module provides clock output frequencies of 32.768 kHz, 1024 Hz, 32 Hz, and 1 Hz.

How does the module handle power loss?

It features an Automatic Backup Switchover function and a Trickle Charger function to maintain timekeeping using the VBACKUP supply.