RV-3149-C3-32.768KHZ-OPTION-A-TB-QC

Real Time Clock Overview

The RV-3149-C3-32.768KHZ-OPTION-A-TB-QC is a Real-Time Clock (RTC) module from Micro Crystal AG, integrating a CMOS circuit with a 32.768 kHz tuning fork crystal in a hermetically sealed ceramic SON-10 package (3.7 x 2.5 x 0.9 mm). It features an SPI-bus interface and operates within a wide voltage range of 1.3 V to 5.5 V. The device provides timekeeping accuracy of ±6 ppm across the -40°C to +85°C temperature range, with extended operation up to +125°C. Key electrical parameters include a typical current consumption of 800 nA at 3 V during timekeeping mode.

Real Time Clock Feature Summary

• Time accuracy of ±6 ppm (Option A) with automatic temperature compensation.
• Extended operating temperature range from -40°C to +125°C.
• Integrated 2 bytes non-volatile EEPROM and 8 bytes user RAM.
• Automotive qualification according to AEC-Q200.

Real Time Clock Applications

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

Real Time Clock Procurement Notes

Verify that the specific ordering suffix matches the required specifications: Option A for ±6 ppm accuracy, TB for the -40°C to +125°C temperature range, and QC for commercial grade or QA for automotive grade. Confirm the package size is C3 (3.7 x 2.5 x 0.9 mm) and ensure compatibility with the 4-wire SPI interface requirements.

Real Time Clock Selection Notes

Select this component when high time accuracy (±6 ppm) and extended temperature capability (+125°C) are required. Ensure the system supports the 1 MHz SPI bus speed and utilizes the 4-wire interface. Consider the AEC-Q200 qualification if the application demands automotive reliability standards.

Real Time Clock Part Context

This part belongs to the RV-3149-C3 series of Real-Time Clock Modules. The 'C3' designation indicates the specific miniature SMD ceramic package dimensions. The series combines a quartz resonator with oscillator and RTC IC technology to provide precise timekeeping in a compact form factor suitable for space-constrained designs.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When evaluating alternatives, verify that the replacement maintains the same SON-10 footprint, SPI interface protocol, and meets the ±6 ppm accuracy requirement over the extended temperature range.

Real Time Clock FAQ

What is the time accuracy specification for Option A?

Option A provides a time accuracy of ±6 ppm across the temperature range of -40°C to +85°C.

How does the device handle power loss?

The module includes an Automatic Backup Switchover function and a trickle charger to maintain timekeeping via the VBACKUP pin during main supply failure.

What clock output frequencies are supported?

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