QT325S-48.000MAAJ-T

Overview

The QT325S-48.000MAAJ-T is a quartz crystal resonator manufactured by QST, operating at a nominal frequency of 48 MHz. It utilizes a glass-sealed surface-mount package with dimensions of 3.2 x 2.5 mm and a height of 0.7 mm. The component features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 50 Ohms. Frequency tolerance is specified at ±30 ppm, with stability maintained within ±30 ppm across the standard commercial temperature range of -20°C to +70°C. This fundamental mode device is designed for precise timing applications requiring compact form factors.

Feature Summary

• Glass-sealed construction ensures environmental protection and long-term reliability
• Fundamental mode operation provides stable oscillation characteristics
• Compact surface-mount design facilitates automated PCB assembly

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics internal clocks

Procurement Notes

Verify the manufacturer marking matches QST specifications upon receipt. Confirm the package orientation and solder pad alignment against the official footprint drawing. Ensure storage conditions remain within recommended humidity limits to preserve solderability before reflow processing.

Selection Notes

Select this component when a 48 MHz reference is required in a minimal footprint. The 18 pF load capacitance must match the oscillator circuit design. Verify that the ±30 ppm stability meets the system's jitter requirements. Consider thermal constraints if operating near the upper temperature limit.

Part Context

This part belongs to the QT325S series of glass-sealed crystals. Similar variants exist with different frequencies or tolerances. The MA suffix typically denotes specific packaging or tolerance grades within the product line. Cross-reference with TXC equivalents if supply chain diversification is needed.

Replacement Considerations

QT325S-48.000MAHJ-T by QST offers identical electrical parameters. QT325S-48.000MAAJ-T by TXC Corporation is a direct functional substitute with matching specs. Verify pin compatibility and mounting dimensions before substitution.