QT49S-14.7456MAHJ-T

Overview

The QT49S-14.7456MAHJ-T is a surface-mount quartz crystal resonator manufactured by QST. It operates at a fundamental frequency of 14.7456 MHz with a load capacitance of 18 pF and an equivalent series resistance of 30 Ohms. The component provides a frequency stability of ±30 ppm and is housed in an HC-49/US SMD package measuring 12.7 x 4.8 x 3.8 mm.

Feature Summary

• Surface-mount construction for automated assembly
• Metal housing design for shielding
• Fundamental mode operation

Applications

• Clock generation circuits
• Microcontroller timing references
• Communication interface synchronization

Procurement Notes

Verify the specific suffix codes against official manufacturer documentation to confirm exact electrical tolerances and packaging specifications. Ensure that the selected variant matches the required load capacitance and operating temperature range for the target application environment.

Selection Notes

Select this component when a standard 14.7456 MHz reference is required in a compact surface-mount form factor. Consider the 30 ppm stability limit and 30 Ohm ESR for oscillator circuit compatibility. Evaluate the physical dimensions against available PCB real estate constraints.

Part Context

This part belongs to the QST QT49S series of surface-mount crystals, designed as drop-in replacements for traditional through-hole HC-49/U packages. The series offers various frequencies and tolerance options within a standardized footprint suitable for high-volume manufacturing processes.

Replacement Considerations

Direct pin-compatible substitutes include other manufacturers' HC-49/SMD variants with identical 14.7456 MHz frequency, 18 pF load capacitance, and similar dimensional profiles. Verify electrical parameters such as ESR and stability before substitution.