AB-RTCMC-32.768KHZ-EOA9-S3-DBT

Overview

The Abracon AB-RTCMC-32.768KHZ-EOA9-S3-DBT is a DTCXO temperature-compensated real-time clock module with an SPI interface. It features a built-in 32.768 kHz crystal, 8 bytes of EEPROM, and SRAM. Operating voltages range from 1.4V to 5.5V for both main supply and backup. Timekeeping current consumption is 1.5µA to 2.2µA at 1.4V to 5V. The device supports HH:MM:SS time format and YY-MM-DD-dd date format. It operates within -40°C to +125°C in a 10-SMD Module package (3.7 x 2.5 x 0.9 mm).

Feature Summary

• Integrated DTCXO with factory calibration for high time accuracy.
• SPI serial interface supporting up to 1 MHz SCL clock frequency.
• Includes alarm, timer, leap year calculation, square wave output, and trickle charger.
• Main power to backup battery switchover circuitry with integrated low-voltage detector.

Applications

• Wide range communication & measuring equipment
• Commercial & Industrial applications
• Automotive electronics applications
• Wireless communications

Procurement Notes

Verify the specific suffix 'DBT' against official documentation to confirm packaging details such as tape and reel or cut tape quantities. Confirm the exact time accuracy option (Option A or B) required for the application, as this affects performance specifications across different temperature ranges.

Selection Notes

Select Option A for tighter time accuracy requirements across extended temperatures (-40°C to +125°C), where accuracy is ±5 to ±8 ppm. Select Option B if looser tolerances are acceptable. Ensure the system voltage remains within the 1.4V to 5.5V range to maintain specified current consumption and timing stability.

Part Context

This component belongs to the AB-RTCMC series of real-time clock modules from Abracon. These modules integrate a tuning fork crystal and temperature compensation circuitry into a compact surface-mount package, designed to replace discrete RTC solutions in space-constrained designs.

Replacement Considerations

Check for availability of Option A vs Option B variants. Verify pin compatibility with existing layouts, specifically CLKOE, INT, CE, SCL, SDO, and SDI functions on the 10-SMD Module package.