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

Real Time Clock Overview

The RV-3129-C3-32.768KHZ-OPTION-B-TB-QC is a hermetically sealed SMT Real-Time Clock Module from 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. This specific variant features Option B temperature compensation for ±25 ppm accuracy between -40°C and +85°C, and supports an extended operating temperature range of -40°C to +125°C (TB). It includes an I²C interface, automatic backup switchover, and AEC-Q200 automotive qualification.

Real Time Clock Feature Summary

• Hermetically sealed ceramic package with metal lid connected to VSS
• Option B time accuracy: ±25 ppm @ -40°C to +85°C
• Extended operating temperature range: -40°C to +125°C
• Low power consumption: 800 nA @ 3 V

Real Time Clock Applications

• IoT devices
• Metering systems
• Industrial equipment
• Automotive electronics
• Health care devices

Real Time Clock Procurement Notes

Verify the ordering suffix 'QC' indicates Commercial Grade standard quality, while 'QA' denotes Automotive Grade AEC-Q200 qualification. Confirm that 'TB' specifies the extended temperature range up to +125°C. Ensure compatibility with IPC/JEDEC J-STD-020C soldering profiles at 260°C for 20–40 seconds. Check availability as this component may be subject to change without notice.

Real Time Clock Selection Notes

Select Option B when ±25 ppm accuracy is sufficient for the application, offering a cost-effective alternative to Option A's ±6 ppm precision. Choose the TB suffix if the environment exceeds +85°C but remains within +125°C. The module requires a backup supply on VBACKUP for continuous operation during main power loss. Verify I²C bus speed requirements against the 400 kHz maximum specification.

Real Time Clock Part Context

This part belongs to the RV-3129-C3 series of real-time clock modules. The C3 designation refers to the specific 3.7 x 2.5 x 0.9 mm package size. The series combines a quartz resonator with oscillator and RTC ICs in a miniature SMD ceramic package, designed for low-power applications requiring high reliability and vacuum operation.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When replacing, ensure the new component matches the 3.7 x 2.5 x 0.9 mm footprint, 10-pin SON package, and I²C interface compatibility.