QT325G-50.000MAHJ-T

Overview

The QT325G-50.000MAHJ-T is a fundamental mode quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 50 MHz with a standard load capacitance of 18 pF. The component features a 4-SMD, no lead package configuration, ensuring compatibility with automated assembly processes. Frequency stability is specified at ±30 ppm over the operating temperature range of -20°C to +70°C, as indicated by the 'A' suffix in the QT325G series nomenclature. This device provides precise timing signals for digital circuits requiring high-frequency clock references.

Feature Summary

• Fundamental resonance mode operation for stable frequency generation
• Surface-mount compatible 4-terminal no-lead package design
• Standardized load capacitance matching common oscillator requirements

Applications

• Microcontroller clock sources
• Communication interface timing
• Digital signal processing systems

Procurement Notes

Verify the specific frequency tolerance suffix against project requirements, as the QT325G series offers multiple stability options including ±10 ppm and ±50 ppm variants. Confirm that the 18 pF load capacitance aligns with the target oscillator circuit design. Ensure the operating temperature range of -20°C to +70°C meets environmental specifications. Cross-reference the package dimensions with PCB footprint libraries to guarantee mechanical fit during assembly.

Selection Notes

Select this component when a 50 MHz fundamental frequency is required for compact surface-mount designs. Consider the ±30 ppm stability if cost-effective precision suffices for the application. Evaluate alternative stability grades within the QT325G family if wider temperature ranges or tighter tolerances are necessary. Ensure the oscillator circuit supports the specified load capacitance to maintain accurate frequency performance.

Part Context

This part belongs to the QT325G series of quartz crystals from QST, which utilizes a standardized 3.2mm x 2.5mm footprint. The series includes various frequency and stability options, distinguished by alphanumeric suffixes indicating tolerance and temperature range. The 'MAHJ' designation typically corresponds to specific electrical parameters and packaging configurations within this product line.

Replacement Considerations

Direct substitutes may include other manufacturers offering 50 MHz crystals in 4-SMD packages with 18 pF load capacitance. Verify equivalent frequency stability and temperature range specifications before substitution. Check mechanical compatibility and soldering profile requirements to ensure seamless integration into existing assemblies.