QT49S-25.000MAHK-T

Overview

The QST QT49S-25.000MAHK-T is a surface-mount crystal oscillator operating at a nominal frequency of 25 MHz. It utilizes an HC-49/US package with dimensions of 12.7 x 4.8 x 3.8 mm. The component features a load capacitance of 18 pF and a frequency stability of ±30 ppm over the temperature range of -40°C to +85°C. This device is designed for precise timing applications requiring reliable performance in industrial environments.

Feature Summary

• Surface-mount design for automated assembly
• Wide operating temperature range for industrial use
• High frequency stability for precision timing

Applications

• Industrial control systems
• Communication equipment
• Microcontroller clock sources

Procurement Notes

Verify the specific suffix HK against official QST documentation to confirm the exact tolerance and stability specifications. Ensure the ordering part number matches the required load capacitance and temperature range for your circuit design. Cross-reference with authorized distributors to confirm current availability status.

Selection Notes

Select this component when a 25 MHz surface-mount crystal with ±30 ppm stability across -40°C to +85°C is required. Consider the 18 pF load capacitance compatibility with the host oscillator circuit. Evaluate alternative suffixes if different tolerance levels or packaging options are needed for the specific application constraints.

Part Context

This part belongs to the QT49S series from QST, which offers various surface-mount crystals. The series provides multiple frequency and tolerance options within the standard HC-49/US footprint. It serves as a timing reference solution for electronic designs requiring compact, reliable oscillators.

Replacement Considerations

Direct substitutes include other QT49S variants with matching 25 MHz frequency and similar stability ratings. Verify equivalent load capacitance and temperature range before substitution. Consult QST documentation for approved pin-compatible alternatives.