QT49S-13.225625MBBK-T

Overview

The QT49S-13.225625MBBK-T is a surface-mount crystal oscillator manufactured by QST, operating at a nominal frequency of 13.225625 MHz. It utilizes the HC-49/US package format with dimensions of 12.7 x 4.8 x 3.8 mm. The component features a load capacitance of 20 pF and an equivalent series resistance of 40 Ohms. Frequency stability is rated at ±50 ppm across the -20°C to +70°C temperature range, with a resonator tolerance of ±50 ppm at 25°C. This device is designed for precision timing applications requiring compact surface-mount integration.

Feature Summary

• Surface-mount construction in standard HC-49/US form factor
• High frequency stability within specified industrial temperature ranges
• Optimized load capacitance for direct microcontroller interface

Applications

• Microcontroller clock sources
• Communication module timing references
• Embedded system oscillators

Procurement Notes

Verify the specific suffix BK-T against official QST documentation to confirm exact electrical tolerances and packaging specifications. Ensure compatibility with existing PCB footprints and reflow profiles. Cross-reference the manufacturer's latest datasheet for any updates on material composition or compliance standards before finalizing procurement orders.

Selection Notes

Select this component when a precise 13.225625 MHz reference is required in a surface-mount environment. The HC-49/US package offers mechanical robustness compared to smaller SMD crystals. Consider the ±50 ppm stability requirement against system jitter budgets. Verify that the 20 pF load capacitance matches the host circuit design requirements for accurate frequency operation.

Part Context

This part belongs to the QT49S series from QST, which provides various frequency options in standardized packages. The series supports diverse electronic applications requiring stable clock signals. The specific model denotes unique frequency and tolerance characteristics within this broader product line.

Replacement Considerations

Direct substitutes include other manufacturers' HC-49/US crystals with identical 13.225625 MHz frequency, 20 pF load capacitance, and ±50 ppm stability. Ensure pinout and dimensional compatibility during replacement.