QT49S-9.216MAHJ-T

Overview

The QT49S-9.216MAHJ-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precision frequency control in electronic circuits. It operates at a nominal frequency of 9.216 MHz and utilizes the HC-49/US package form factor adapted for SMD mounting. The component features a load capacitance of 18 pF and an equivalent series resistance of 30 Ohms. Frequency stability is maintained within ±30 ppm across the operating temperature range of -40°C to +85°C, ensuring reliable performance in various applications requiring stable clock signals.

Feature Summary

• Surface-mount design compatible with automated assembly processes
• High frequency stability within specified industrial temperature ranges
• Standardized HC-49/US footprint dimensions for board space efficiency

Applications

• Microcontroller clock sources
• Communication interface timing
• Digital signal processing systems

Procurement Notes

Verify the specific suffix MAHJ-T against official QST documentation to confirm exact electrical parameters and packaging specifications. Ensure compatibility with reflow soldering profiles defined in the manufacturer datasheet. Cross-reference part numbers with authorized distributors to avoid counterfeit components. Confirm that the 18pF load capacitance matches the target circuit design requirements before procurement.

Selection Notes

Select this component when a 9.216 MHz reference is required for SMD-based designs. Consider the ±30 ppm stability limit for timing-sensitive applications. Evaluate the 30 Ohm ESR against oscillator circuit drive level constraints. Compare physical dimensions of 12.7x4.8x3.8mm against available PCB real estate. Ensure the operating temperature range meets environmental conditions.

Part Context

This crystal belongs to the QT49S series from QST, which offers various frequency options in the same SMD package family. Other variants include different frequencies such as 16 MHz or 25 MHz while maintaining similar electrical characteristics. The series provides a standardized solution for mass-produced electronics requiring consistent frequency accuracy and mechanical reliability.

Replacement Considerations

Direct substitutes may include other manufacturers' HC-49/US SMD crystals with identical 9.216 MHz frequency, 18pF load capacitance, and ±30 ppm stability. Verify pinout compatibility and thermal characteristics before substitution. Generic equivalents must meet the same ESR and frequency tolerance specifications.