QT325G-18.432MAHE-T

Overview

The QST QT325G-18.432MAHE-T is a quartz crystal resonator designed for surface-mount applications. It operates at a fundamental frequency of 18.432 MHz with a frequency stability of ±30 ppm over the temperature range of -40°C to +85°C. The component features a load capacitance of 12 pF and is housed in a compact 4-SMD, No Lead package with dimensions of 3.2 x 2.5 x 0.8 mm. This configuration ensures reliable performance in space-constrained electronic designs requiring precise timing signals.

Feature Summary

• Surface-mount quartz crystal resonator optimized for high-frequency stability
• Wide operating temperature range supporting industrial environmental conditions
• Compact 4-SMD no-lead package design for automated assembly integration

Applications

• Microcontroller clock sources
• Communication module timing circuits
• Industrial control system oscillators

Procurement Notes

Verify the specific suffix HE against official QST documentation to confirm the exact temperature range and tolerance specifications. Ensure compatibility with the target PCB footprint and soldering profile requirements. Cross-reference the load capacitance value with the host circuit design to maintain frequency accuracy. Confirm availability through authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a 18.432 MHz reference signal is required with ±30 ppm stability across industrial temperatures. The 12 pF load capacitance must match the oscillator circuit's input capacitance. Consider the 3.2x2.5mm package size for board space limitations. Validate that the SMD no-lead format aligns with manufacturing capabilities.

Part Context

This part belongs to the QT325G series of quartz crystals from QST. The series offers various frequency and tolerance options within a standardized small outline package. The QT325G line is engineered for cost-effective timing solutions in consumer and industrial electronics, providing consistent performance across different production batches.

Replacement Considerations

Direct substitutes include other 18.432 MHz crystals with identical 3.2x2.5mm footprints and 12pF load capacitance. Verify that alternative parts meet the same ±30 ppm stability requirement over the -40°C to +85°C range. Check for equivalent electrical parameters such as ESR and drive level sensitivity before substitution.