RV-1805-C3-32.768KHZ-2PPM-TA-QC

Real Time Clock Overview

The RV-1805-C3-32.768KHZ-2PPM-TA-QC is a discontinued SMD Real-Time Clock Module by Micro Crystal AG, integrating a CMOS circuit with a tuning fork crystal in a hermetically sealed ceramic package (3.7 x 2.5 x 0.9 mm). It operates on a supply voltage of 1.5 V to 3.6 V and achieves extreme low power consumption, drawing as little as 17 nA in RC mode at 3 V. The module provides factory-calibrated time accuracy of ±2 ppm at 25°C, supports I²C communication up to 400 kHz, and includes features such as automatic backup switchover, trickle charging, and 256 bytes of user RAM.

Real Time Clock Feature Summary

• Extreme low power consumption: 60 nA (XTAL mode), 17 nA (RC mode), and 22 nA (RC autocalibration) at 3 V.
• High time accuracy: Factory calibrated to ±2 ppm at 25°C with user-programmable offset capability.
• Integrated functionality: Combines RTC logic, vacuum-sealed XTAL, and 256 bytes of user RAM in a single SON-10 package.
• Robust protection: Features automatic backup switchover, trickle charger, watchdog timer, and AEC-Q200 qualification.

Real Time Clock Applications

• IoT devices requiring long battery life
• Metering equipment
• Industrial control systems
• Health care monitoring devices
• Wearables and portable electronics

Real Time Clock Procurement Notes

This component is officially classified as a Discontinued Product by the manufacturer. Availability is limited to existing stock or last-time buys; new design-in is not recommended. Verify end-of-life status and lead times with authorized distributors before procurement planning.

Real Time Clock Selection Notes

Select this module for applications prioritizing ultra-low standby current over high-frequency clock outputs. Ensure the system supports the 1.5 V to 3.6 V operating range and utilizes an I²C interface compatible with 400 kHz speeds. Consider the discontinuation status when designing for long-term production runs.

Real Time Clock Part Context

The RV-1805-C3 series belongs to Micro Crystal’s line of integrated RTC modules that combine quartz resonators with CMOS timing circuits. This specific variant offers ±2 ppm accuracy and is housed in a compact 3.7 x 2.5 x 0.9 mm SON-10 package. It is designed for environments demanding high stability and minimal power drain.

Real Time Clock Replacement Considerations

As this part is discontinued, no direct official replacement is listed in the provided documentation. Engineers should evaluate alternative RTC modules from other manufacturers that offer similar form factors, low power profiles, and I²C interfaces.

Real Time Clock FAQ

What is the maximum current consumption in RC mode?

The maximum current consumption in RC mode at 3 V is 25 nA, with a typical value of 17 nA.

How does the module handle power loss?

It features an automatic backup switchover function that seamlessly transitions to the VBACKUP pin supply when the main VDD voltage drops, ensuring continuous timekeeping.

Is the device qualified for automotive applications?

Yes, the RV-1805-C3 is qualified according to the AEC-Q200 standard.