QT532G-18.432MAAE-T

Overview

The QT532G-18.432MAAE-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 18.432 MHz with a frequency tolerance of ±30 ppm. The component features a load capacitance of 12 pF and an equivalent series resistance (ESR) of 50 Ohms. It utilizes a glass-sealed package in a 2-SMD, No Lead configuration, measuring 5.0 mm x 3.2 mm x 1.2 mm. This device provides stable oscillation for timing circuits requiring precise frequency control within specified temperature ranges.

Feature Summary

• Glass-sealed construction for environmental stability
• Surface-mount design for automated assembly
• High-frequency stability with ±30 ppm tolerance

Applications

• Microcontroller clock sources
• Communication module timing
• Digital signal processing circuits

Procurement Notes

Verify the specific suffix 'AAE' against official QST documentation to confirm the exact sealing type and terminal finish. Ensure the load capacitance requirement of the target circuit matches the 12pF specification. Confirm that the operating temperature range aligns with the component's rated limits. Cross-reference the footprint dimensions with the PCB layout to ensure proper placement. Request manufacturer datasheets for detailed reliability data before finalizing procurement.

Selection Notes

Select this component when a 18.432 MHz reference is required for digital systems. The 12pF load capacitance must match the oscillator circuit design. Consider the ±30 ppm stability for applications sensitive to frequency drift. The 50 Ohm ESR impacts drive level requirements; ensure the driving circuit does not exceed safe power levels. Evaluate the 2-SMD package size against available board space constraints.

Part Context

This part belongs to the QT532G series of quartz crystals from QST. The series offers various frequencies and package options for SMD applications. The 5x3.2mm form factor is common for mid-range frequency requirements. Competing parts may offer different tolerances or packaging styles. The glass seal variant typically provides better humidity resistance compared to epoxy-sealed alternatives.

Replacement Considerations

Direct substitutes include other manufacturers' 18.432 MHz crystals with identical 12pF load capacitance and 50 Ohm ESR. Verify that replacement parts maintain the same 5.0x3.2x1.2mm footprint. Check if alternative suppliers offer compatible sealing technologies. Ensure the replacement meets the same ±30 ppm stability requirement.