QT49S-16.384MEEJ-T

Overview

The QST QT49S-16.384MEEJ-T is a surface-mount crystal oscillator operating at a nominal frequency of 16.384 MHz. It features a frequency stability of ±10 ppm and an operating temperature maximum of 70°C. The component utilizes an HC-49/US package with dimensions of 12.7 mm x 4.8 mm. Electrical specifications include a load capacitance of 18 pF and a series resistance of 30 Ohms.

Feature Summary

• Surface mount design for automated assembly
• High frequency stability within specified temperature range
• Standardized HC-49/US form factor compatibility

Applications

• Clock signal generation in digital circuits
• Microcontroller system timing references
• Communication interface synchronization

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to ensure correct tolerance and packaging configuration. Confirm that the requested part matches the exact frequency and load capacitance requirements of the target circuit design before finalizing procurement orders.

Selection Notes

Select this component when a precise 16.384 MHz reference is required with tight stability constraints. Ensure the application environment remains within the specified maximum operating temperature limits. Verify board space accommodates the 12.7 mm x 4.8 mm footprint and that the 18 pF load capacitance aligns with the host oscillator circuit design.

Part Context

This part belongs to the QT49S series of surface-mount crystals from QST. The series offers various frequency options and tolerance grades, allowing designers to standardize on a single package type across different product lines while adjusting electrical parameters as needed for specific timing applications.

Replacement Considerations

Direct substitutes must match the 16.384 MHz frequency, 18 pF load capacitance, and HC-49/US package dimensions. Verify equivalent stability ratings and series resistance values to maintain circuit performance without redesign.