QT325S-37.400MEEJ-T

Overview

The QST QT325S-37.400MEEJ-T is a surface-mount quartz crystal resonator designed for precise frequency generation in electronic circuits. It operates at a nominal frequency of 37.4 MHz with a frequency tolerance and stability of ±10 ppm within the -20°C to +70°C temperature range. The component features an equivalent series resistance (ESR) of 50 Ohms maximum and a load capacitance of 18 pF. It utilizes a compact 4-SMD, no-lead package with body dimensions of 3.2 x 2.5 x 0.7 mm, suitable for automated assembly processes.

Feature Summary

• Compact 4-SMD no-lead package design facilitating automated surface-mount assembly
• High frequency stability of ±10 ppm across specified industrial temperature ranges
• Low equivalent series resistance ensuring efficient oscillation performance

Applications

• Microcontroller clock sources
• Communication module timing references
• Digital signal processing circuitry

Procurement Notes

Verify the specific suffix codes against official QST documentation to confirm exact electrical parameters and temperature ratings. Ensure compatibility with PCB footprint dimensions and reflow soldering profiles. Cross-reference part numbers carefully as minor suffix variations may indicate different load capacitances or stability grades. Confirm availability through authorized distributors to guarantee genuine components.

Selection Notes

Select this component when a 37.4 MHz reference is required with tight stability constraints in space-constrained designs. Evaluate the 18 pF load capacitance requirement against the oscillator circuit design to ensure proper frequency accuracy. Consider the operating temperature range limits relative to the final application environment. Verify that the 50 Ohm ESR specification aligns with the driving capability of the host oscillator IC.

Part Context

This model belongs to the QT325S series of thin-film or bulk acoustic wave crystals manufactured by QST. The series offers various frequency options and package configurations tailored for consumer electronics and industrial applications. The specific designation indicates a standard SMD variant optimized for high-volume manufacturing environments requiring consistent performance.

Replacement Considerations

Direct substitutes must match the 37.4 MHz frequency, 18 pF load capacitance, 50 Ohm ESR, and ±10 ppm stability. Compatible packages include 3.2x2.5mm 4-SMD no-lead footprints. Verify thermal characteristics and mounting reliability before integration.