QT325S-25.000MAHK-T

Overview

The QT325S-25.000MAHK-T is a quartz crystal resonator manufactured by QST, operating at a fundamental frequency of 25 MHz. It utilizes a glass-sealed surface-mount package with dimensions of 3.2 x 2.5 mm and a height of approximately 0.7 mm. The component features a load capacitance of 18 pF and a series resistance of 50 Ohms. Frequency tolerance and stability are specified at ±30 ppm across the operating temperature range of -40°C to +85°C. The device is designed for high-frequency applications requiring precise timing signals in compact electronic systems.

Feature Summary

• Glass-sealed construction for enhanced environmental protection
• Surface-mount design compatible with automated assembly processes
• High frequency stability within specified industrial temperature ranges

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics internal clocks

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to ensure correct frequency tolerance and packaging specifications. Confirm RoHS compliance status and lead-free requirements prior to integration. Cross-reference part numbers carefully as similar designations may indicate different electrical characteristics or manufacturing batches. Ensure compatibility with existing PCB footprints and reflow soldering profiles defined in the datasheet.

Selection Notes

Select this component when a 25 MHz reference signal is required in a minimal footprint. Consider the 18 pF load capacitance requirement for oscillator circuit design. Evaluate the ±30 ppm stability against system timing accuracy needs. Compare thermal performance specifications if operation exceeds standard commercial temperature limits. Verify package dimensions against mechanical constraints in the final enclosure design.

Part Context

This part belongs to the QT325S series of surface-mount quartz crystals. The series offers various frequency options within a standardized 3.2x2.5 mm package format. Components in this family share common mounting characteristics while differing in frequency and tolerance specifications. The glass-seal technology distinguishes these parts from ceramic-packaged alternatives in terms of long-term stability.

Replacement Considerations

Cross-reference tools suggest parametrically similar parts from other manufacturers. Verify equivalent frequency, load capacitance, and stability ratings before substitution. Check package dimension tolerances to ensure mechanical fit. Confirm that alternative components meet the same environmental and reliability standards.