AB-RTCMC-32.768KHZ-EOZ9-S3-HAT

Overview

The Abracon AB-RTCMC-32.768KHZ-EOZ9-S3-HAT is a digitally temperature-compensated real-time clock (DTCXO) module featuring an SPI interface. It integrates a 32.768 kHz tuning fork crystal, EEPROM, and a trickle charger within a compact 10-SMD package measuring 3.7 x 2.5 x 0.9 mm. The device operates on a supply voltage of 1.4V to 5.5V with timekeeping current ranging from 4.6µA to 5.5µA across the -40°C to +125°C operating range. It provides year, month, day, weekday, hours, minutes, and seconds tracking with factory-calibrated accuracy.

Feature Summary

• Integrated DTCXO with built-in tuning fork crystal for high stability
• SPI serial interface supporting up to 1 MHz SCL clock frequency
• On-board EEPROM for user data storage
• Main power to backup battery switchover with integrated trickle charger

Applications

• Communication and measuring equipment
• Automotive electronics applications
• Wireless communications systems
• Commercial and industrial devices

Procurement Notes

Verify the specific suffix 'HAT' against official documentation to confirm packaging quantity and timing accuracy option, as datasheet references indicate 'T' for tape and reel and 'A/B' for accuracy grades. Ensure the SPI interface requirement matches the system design, as this model differs from I2C variants in the same series.

Selection Notes

Select this component when extended temperature operation up to 125°C is required alongside precise timekeeping. The DTCXO architecture eliminates external temperature compensation components. Verify that the host microcontroller supports the SPI protocol and can handle the specified voltage levels for both VDD and the interface.

Part Context

This module belongs to the AB-RTCMC family of real-time clocks. Unlike standard RTCs, it incorporates digital temperature compensation circuitry to maintain accuracy across wide thermal ranges. The 10-SMD module form factor allows for space-constrained designs while providing integrated power management features.

Replacement Considerations

Direct replacements must match the SPI interface and 10-SMD package dimensions. Models like AB-RTCMC-32.768kHz-EOA9-S3 offer similar functionality but may differ in accuracy options or interface speed specifications.