QT325S-32.000MEJQ-T

Overview

The QT325S-32.000MEJQ-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 32.000 MHz and utilizes a glass seal package construction to ensure environmental stability. The component features a load capacitance of 10 pF and an equivalent series resistance of 50 Ohms. Frequency stability is specified at ±10 ppm within the -20°C to +70°C temperature range, with an additional tolerance of ±15 ppm across the full operating spectrum. The physical dimensions are 3.2 mm x 2.5 mm, housed in a four-terminal no-lead SMD package suitable for automated assembly processes.

Feature Summary

• Glass seal construction provides enhanced environmental protection and long-term frequency stability.
• Compact 3.2x2.5 mm surface-mount footprint facilitates high-density PCB layout.
• Low equivalent series resistance supports efficient oscillator circuit design.
• High frequency accuracy ensures reliable timing performance in communication systems.

Applications

• Embedded communication modules requiring precise clock signals
• Microcontroller-based systems needing stable timekeeping references
• Consumer electronics utilizing surface-mount technology

Procurement Notes

Verify the specific suffix MEJQ-T corresponds to the required ±10 ppm stability and 10 pF load capacitance for your design. Confirm that the glass seal package type meets your environmental requirements. Ensure the 3.2x2.5 mm footprint aligns with your PCB land pattern. Check for any RoHS or REACH compliance documentation if required by your manufacturing standards. Validate compatibility with your reflow soldering profile.

Selection Notes

Select this component when a 32 MHz reference with high stability is needed in a small form factor. The glass seal offers better performance than standard ceramic packages in varying temperatures. Consider the 10 pF load capacitance requirement for your oscillator circuit design. The low ESR value may simplify driver circuit complexity. Evaluate the ±10 ppm tolerance against your system's jitter budget.

Part Context

This part belongs to the QT325S series of quartz crystals from QST, which are characterized by their glass-sealed construction and surface-mount compatibility. The series includes various frequency options and stability grades, differentiated by ordering suffixes. The QT325S line is positioned for applications demanding reliable timing in compact electronic devices, offering a balance between performance and size compared to larger through-hole alternatives.

Replacement Considerations

Direct substitutes must match the 32 MHz frequency, 3.2x2.5 mm package, glass seal type, and 10 pF load capacitance. Verify that alternative parts offer comparable ±10 ppm stability over the -20°C to +70°C range. Ensure the replacement has similar ESR characteristics to maintain oscillator startup reliability. Cross-reference pinout and terminal configuration for direct board compatibility.