AB-RTCMC-32.768KHZ-EOA9-S3-HAT

Overview

The AB-RTCMC-32.768KHZ-EOA9-S3-HAT is a temperature-compensated real-time clock module with an integrated tuning fork crystal oscillating at 32.768 kHz. It features a DTCXO architecture for high time accuracy and operates on a wide supply voltage range of 1.4V to 5.5V. The device utilizes an SPI interface supporting SCL frequencies up to 1 MHz. Key electrical parameters include a typical current consumption of 800nA at 3.0V, an operating temperature range of -40°C to +125°C, and a compact 10-SMD package measuring 3.7 x 2.5 x 0.9 mm.

Feature Summary

• Digitally Temperature Compensated Crystal Oscillator (DTCXO) with built-in calibration circuitry
• SPI serial interface with fast mode SCL clock frequency of 1 MHz
• Integrated low-voltage detector, power-on reset, and main-to-backup switchover with trickle charger
• Programmable CLKOUT pins providing 32.768 kHz, 1024 Hz, 32 Hz, or 1 Hz signals

Applications

• Wide range in communication & measuring equipment
• Commercial & Industrial applications
• Automotive electronics applications
• Wireless communications
• PDA and Palm Pilots
• Credit Cards with Security Technology

Procurement Notes

Verify the specific time accuracy option required, as the base model supports Option A or B with different ppm tolerances across temperature ranges. Confirm the extended temperature grade (-40°C to +125°C) matches the application environment. Ensure the SPI interface timing requirements align with the host controller's capabilities.

Selection Notes

Select based on the required time accuracy specification; Option A offers tighter tolerance than Option B at extreme temperatures. Consider the 1.4V minimum supply voltage for low-power battery applications. Verify that the 10-SMD package dimensions fit the PCB layout constraints. Check if the programmable CLKOUT functionality is needed for peripheral synchronization.

Part Context

This component belongs to Abracon's AB-RTCMC series of real-time clock modules. It distinguishes itself from standard RTCs by incorporating a Digitally Temperature Compensated Crystal Oscillator (DTCXO) to maintain precision without external compensation components. The module integrates memory and power management functions into a single small footprint.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.