QT49S-14.31818MBBK-T

Overview

The QT49S-14.31818MBBK-T is a surface-mount quartz crystal oscillator manufactured by QST. It operates at a fundamental frequency of 14.31818 MHz with a load capacitance of 20 pF. The component exhibits a frequency tolerance and stability of ±50 ppm across an operating temperature range of -20°C to +70°C. Its equivalent series resistance (ESR) is specified as 30 Ohms. The physical package dimensions are 12.7 mm in length, 4.8 mm in width, and 3.8 mm in height.

Feature Summary

• Fundamental mode operation for stable frequency generation
• Surface mount design for automated assembly integration
• Defined electrical characteristics including 20pF load capacitance and 30 Ohm ESR

Applications

• Clock signal generation for digital logic circuits
• Microcontroller system timing references
• Communication interface synchronization modules

Procurement Notes

Verify the manufacturer designation carefully, as similar part numbers appear under TXC Corporation in distributor databases. Confirm the specific suffix 'BBK' matches the required 12.7x4.8x3.8mm package dimensions and 20pF load capacitance specifications. Ensure the operating temperature range aligns with the -20°C to +70°C requirement for your application environment before finalizing procurement.

Selection Notes

Select this component when a 14.31818 MHz reference is required for SMD layouts. The ±50 ppm stability suits general-purpose timing applications rather than high-precision requirements. Consider the 30 Ohm ESR value for circuit impedance matching. Verify that the 20pF load capacitance matches the host device's specified load capacitance to ensure accurate frequency output.

Part Context

This part belongs to the QT49S series of surface-mount crystals from QST. It shares the same form factor and mounting style as other variants in the series, such as those operating at 16.9344 MHz or 16.000 MHz. The series is characterized by fundamental mode operation and standard industrial temperature ranges, providing a consistent platform for various clocking needs.

Replacement Considerations

Direct substitutes include other manufacturers offering 14.31818 MHz crystals with identical 12.7x4.8x3.8mm dimensions, 20pF load capacitance, and ±50 ppm stability. Ensure any replacement maintains the 30 Ohm ESR specification and supports the -20°C to +70°C operating range to guarantee functional equivalence.