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

Real Time Clock Overview

The Micro Crystal RV-3129-C3-32.768KHZ-OPTION-B-TB-QA is a hermetically sealed SMT Real-Time Clock module integrating a CMOS circuit and a 32.768 kHz tuning fork crystal within a 3.7 x 2.5 x 0.9 mm ceramic package with a metal lid. It operates on a supply voltage of 1.3 V to 5.5 V, consuming 800 nA at 3 V in timekeeping mode. The component provides year, month, weekday, date, hours, minutes, and seconds via an I²C interface (400 kHz). It features automatic backup switchover, a trickle charger, and Option B temperature compensation accuracy of ±25 ppm from -40°C to +85°C.

Real Time Clock Feature Summary

• Hermetically sealed SON-10 ceramic package with Au-flashed pads
• Low power consumption: 800 nA @ 3 V in timekeeping mode
• Option B time accuracy: ±25 ppm (-40°C to +85°C)
• Extended operating temperature range: -40°C to +125°C
• Automotive qualification according to AEC-Q200

Real Time Clock Applications

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

Real Time Clock Procurement Notes

Verify the specific ordering suffixes for this part number against official documentation. The 'TB' suffix indicates an extended temperature range up to +125°C, while 'QA' denotes automotive grade qualification per AEC-Q200. Confirm that the Option B specification aligns with the required ±25 ppm accuracy tolerance for the target application environment before procurement.

Real Time Clock Selection Notes

Select this module when high reliability and vacuum-sealed stability are required. The Option B accuracy (±25 ppm) suits general timing needs, whereas Option A offers ±6 ppm for higher precision. Ensure the design supports the 1.3 V to 5.5 V supply range and utilizes the I²C bus for communication. The integrated trickle charger simplifies battery management for backup power scenarios.

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 3.7 x 2.5 x 0.9 mm package size. The series combines a quartz resonator with oscillator logic in a miniature surface-mount form factor, designed for space-constrained applications requiring precise timekeeping without external crystals.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. When evaluating alternatives, ensure compatibility with the SON-10 footprint, I²C interface protocol, and voltage requirements.