QT325S-48.000MAHQ-T

Overview

The QT325S-48.000MAHQ-T is a quartz crystal oscillator manufactured by QST, operating at a fundamental frequency of 48 MHz. It features a frequency tolerance and stability of ±30 ppm at 25°C and across the temperature range of -40°C to +85°C. The component utilizes a 10 pF load capacitance and exhibits an equivalent series resistance (ESR) of 50 Ohms. It is housed in a compact 3.2 x 2.5 mm four-pad surface-mount package with no lead construction, designed for reliable timing applications requiring precise oscillation.

Feature Summary

• Provides stable oscillation with ±30 ppm frequency tolerance at room temperature
• Maintains frequency stability across extended industrial temperature ranges
• Utilizes a compact surface-mount package for space-constrained designs

Applications

• Timing circuits requiring precise 48 MHz reference signals
• Microcontroller clock sources in embedded systems
• Communication modules needing stable frequency generation

Procurement Notes

Verify the specific suffix HQ-T against official QST documentation to confirm the exact load capacitance and temperature range specifications. Ensure compatibility with the target circuit's load capacitance requirements before integration. Cross-reference the datasheet for mechanical dimensions and soldering recommendations to prevent installation errors.

Selection Notes

Select this component when a 48 MHz frequency is required with ±30 ppm stability over a -40°C to +85°C range. Consider the 10 pF load capacitance requirement for circuit design matching. Evaluate the 50 Ohm ESR against the oscillator driver strength. Compare physical dimensions against available board space constraints.

Part Context

This part belongs to the QT325S series of surface-mount crystals from QST. The series offers various frequency options within a standardized 3.2 x 2.5 mm footprint. Variants differ primarily in frequency, load capacitance, and temperature stability ratings while maintaining consistent mechanical profiles for automated assembly processes.

Replacement Considerations

Direct substitutes include other 48 MHz crystals with identical 3.2x2.5mm packages, 10pF load capacitance, and ±30ppm stability. Verify that alternative manufacturers support the same -40°C to +85°C operating range and 50 Ohm ESR specifications to ensure functional equivalence.