QT325S-32.768MEEQ-T

Overview

The QT325S-32.768MEEQ-T is a quartz crystal oscillator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 32.768 MHz with a frequency tolerance and stability of ±10 ppm across specified temperature ranges. The component features a load capacitance of 10 pF and an equivalent series resistance (ESR) of 50 Ohms. It utilizes a 4-SMD, no-lead package with dimensions of 3.2mm x 2.5mm, suitable for compact electronic designs requiring precise timing signals.

Feature Summary

• Seam-sealed construction for enhanced environmental protection
• Surface-mount design for automated assembly compatibility
• High frequency stability within tight tolerance limits

Applications

• Real-time clock circuits in consumer electronics
• Microcontroller system clocks
• Communication device timing references

Procurement Notes

Verify the manufacturer designation on the component marking against official QST documentation to ensure authenticity. Confirm that the specific suffix matches the required frequency and tolerance specifications. Check for RoHS compliance status as indicated in the latest datasheet revision. Ensure storage conditions meet moisture sensitivity level requirements prior to soldering.

Selection Notes

Select this component when a 32.768 MHz reference is required for low-power or timekeeping applications. Consider the ±10 ppm stability requirement against the system's clock accuracy needs. Evaluate the 3.2x2.5mm footprint constraints against the PCB layout. Verify the load capacitance matches the oscillator circuit design parameters.

Part Context

This part belongs to the QT325S series of MHz quartz crystals from QST. The series offers various standard frequencies tailored for general-purpose timing applications. The 32.768 MHz variant is specifically optimized for binary division in digital systems. It represents a standard solution for cost-sensitive, space-constrained designs requiring reliable oscillation.

Replacement Considerations

Compatible substitutes include the TXC Corporation QT325S-32.768MEEQ-T, which shares identical electrical parameters and physical dimensions. Ensure the replacement maintains the same seam-seal technology and SMD package type. Verify that the substitute meets the same ±10 ppm stability and 10pF load capacitance requirements.