QT49S-11.000MBBK-T

Overview

The QT49S-11.000MBBK-T is a surface-mount MHz crystal oscillator manufactured by QST Corporation, designed for digital frequency control applications. It operates at a nominal frequency of 11 MHz with a load capacitance of 20 pF and a maximum series resistance of 40 Ohms. The component utilizes an HC-49/US package style with dimensions of 11.40mm x 4.80mm. Frequency stability is rated at ±50 ppm within the standard operating temperature range. This SMD type offers resistance-welded metal can construction suitable for automated assembly processes.

Feature Summary

• Surface-mount design compatible with automated pick-and-place manufacturing equipment
• Resistance-welded metal can construction ensuring hermetic sealing and environmental protection
• HC-49/US form factor providing standardized footprint for PCB layout integration

Applications

• Digital clock signal generation in microprocessor systems
• Frequency reference sources for communication modules
• Timing circuits in consumer electronic devices

Procurement Notes

Verify the specific suffix BBT against official QST documentation to confirm exact stability and temperature range specifications. Ensure compatibility with reflow soldering profiles specified in the manufacturer's datasheet. Confirm that the 20pF load capacitance matches the target circuit design requirements before finalizing procurement orders.

Selection Notes

Select this component when a surface-mount solution is required for 11 MHz timing applications. Consider the ±50 ppm stability rating against system jitter requirements. Evaluate the HC-49/US package size constraints relative to available PCB real estate. Compare series resistance limits with oscillator driver strength capabilities.

Part Context

This part belongs to the QT49S series of surface-mount crystals from QST Corporation. The series provides various frequency options within the 3.2MHz to 90MHz range. Different suffixes indicate variations in stability, temperature range, and packaging details. The QT49S line replaces traditional through-hole crystals in modern compact electronics designs.

Replacement Considerations

Direct substitutes include other 11 MHz SMD crystals with identical 20pF load capacitance and similar physical dimensions. Verify equivalent electrical parameters such as series resistance and stability ratings. Check pinout compatibility if mechanical mounting differs slightly between manufacturers.