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

Real Time Clock Overview

The RV-1805-C3-32.768KHZ-2PPM-TA-QA is a discontinued SMD Real-Time Clock Module by Micro Crystal AG, integrating a CMOS circuit and a 32.768 kHz tuning fork crystal within a hermetically sealed ceramic SON-10 package (3.7 x 2.5 x 0.9 mm). It operates on a supply voltage of 1.5 V to 3.6 V with extreme low power consumption: 60 nA in XTAL mode, 17 nA in RC mode, and 22 nA in RC autocalibration mode at 3 V. Factory calibrated to ±2 ppm at 25°C, it features an I²C interface (400 kHz), 256 bytes user RAM, automatic backup switchover, and AEC-Q200 qualification.

Real Time Clock Feature Summary

• Extreme low power consumption: 60 nA (XTAL), 17 nA (RC), 22 nA (RC autocal) @ 3 V
• High time accuracy: ±2 ppm factory calibration at 25°C with user programmable offset
• Integrated functions: Automatic backup switchover, trickle charger, timer, alarm, watchdog, and external event detection
• Robust packaging: Hermetically sealed ceramic SON-10 package with metal lid connected to VSS

Real Time Clock Applications

• IoT devices
• Metering systems
• Industrial equipment
• Health care devices
• Wearables and portables

Real Time Clock Procurement Notes

This component is officially designated as a Discontinued Product by the manufacturer. Verification of current availability requires direct inquiry with authorized distributors or the manufacturer, as standard ordering suffixes may not apply to end-of-life stock. Designers should consider alternative solutions for new production runs.

Real Time Clock Selection Notes

Select this module for applications requiring ultra-low standby current and high precision timing without external crystals. The integrated RC oscillator option allows for cost-sensitive designs with autocalibration capabilities. Ensure the design supports the 1.5 V to 3.6 V operating range and utilizes the I²C interface for communication. Note that the metal lid must be connected to VSS.

Real Time Clock Part Context

The RV-1805-C3 belongs to Micro Crystal's RTC module family, which combines quartz resonators with CMOS logic in miniature ceramic packages. This specific model targets automotive and industrial sectors due to its AEC-Q200 qualification and hermetic sealing, offering superior shock and vibration resistance compared to standard surface-mount crystals.

Real Time Clock Replacement Considerations

As this part is discontinued, verify if the RV-3029-C3 series serves as a functional replacement. The RV-3029 offers similar I²C interfaces and low power characteristics but differs in package dimensions and specific feature sets such as temperature compensation options.