QT49S-14.7456MEEJ-T

Overview

The QT49S-14.7456MEEJ-T is a surface-mount quartz crystal manufactured by QST, operating at a fundamental frequency of 14.7456 MHz. It features a frequency stability and tolerance of ±10 ppm and an equivalent series resistance (ESR) of 30 Ohms. The component utilizes an HC-49/US package with dimensions of 12.7 mm in length, 4.8 mm in width, and 3.8 mm in height. It is designed for a load capacitance of 18 pF and operates within a temperature range of -20°C to +70°C.

Feature Summary

• Fundamental mode operation for precise timing applications
• Surface mount construction compatible with automated assembly processes
• HC-49/US form factor providing standardized footprint compatibility

Applications

• Digital clock signal generation
• Microcontroller system oscillators
• Communication interface timing circuits

Procurement Notes

Verify the specific manufacturer designation when sourcing, as the model prefix may vary between TXC Corporation and QST while retaining identical electrical specifications. Confirm RoHS compliance status and check for obsolescence notices or product change notifications prior to finalizing procurement plans to ensure supply chain continuity.

Selection Notes

Select this component for designs requiring a standard 14.7456 MHz reference with moderate stability requirements. Ensure the circuit load capacitance matches the specified 18 pF value to maintain accurate frequency performance. Consider the ±10 ppm tolerance against environmental temperature variations within the specified -20°C to +70°C operational range.

Part Context

This part belongs to the QT49S series of surface-mount crystals, which are widely used in consumer electronics and industrial equipment. The HC-49/US package is a legacy form factor adapted for surface mounting, offering a balance between size constraints and mechanical robustness for general-purpose timing applications.

Replacement Considerations

Abracon LLC ABL-14.7456MHZ-B1U-T is documented as a similar substitute part number.