QT532S-20.000MAHJ-T

Overview

The QT532S-20.000MAHJ-T is a surface-mount quartz crystal resonator manufactured by QST. It operates at a fundamental frequency of 20 MHz with a frequency stability and tolerance of ±30 ppm. The component features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 40 Ohms. It utilizes a four-terminal SMD package with no leads, measuring 5.0 x 3.2 x 0.9 mm.

Feature Summary

• Surface-mount quartz crystal construction for reliable high-frequency operation
• Compact 5.0x3.2mm footprint suitable for space-constrained PCB layouts
• Stable frequency performance with ±30 ppm tolerance

Applications

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

Procurement Notes

Verify the specific package dimensions and terminal configuration against the official QST datasheet prior to integration. Confirm that the load capacitance requirements of the target circuit align with the 18 pF specification to ensure accurate frequency generation. Ensure compatibility with standard reflow soldering profiles for leadless SMD components.

Selection Notes

Select this component when a precise 20 MHz reference is required in a compact surface-mount design. Consider the ±30 ppm stability requirement relative to system timing constraints. Evaluate the 40 Ohm ESR against oscillator circuit drive level specifications to prevent over-driving the crystal.

Part Context

This part belongs to the QST QT532S series of sealed quartz crystals. These components are designed for general-purpose timing applications requiring stable oscillation in consumer electronics and industrial control systems. The series offers various frequency options within the same mechanical envelope.

Replacement Considerations

Direct substitutes must match the 20 MHz frequency, 18 pF load capacitance, 40 Ohm ESR, and 5.0x3.2x0.9mm SMD package. Verify pinout compatibility if alternative manufacturers offer similar footprints.