QT325S-40.000MAGE-T

Overview

The QT325S-40.000MAGE-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precision timing applications in electronic circuits. It operates at a fundamental frequency of 40.000 MHz and utilizes a standard 3.2mm x 2.5mm SMD package with dimensions of 3.2x2.5x0.7mm. The component features a load capacitance of 12pF and exhibits a frequency stability of ±30ppm at 25°C, with an overall frequency tolerance of ±50ppm across the operating temperature range. Its equivalent series resistance (ESR) is specified at 50Ω, ensuring efficient energy transfer within oscillator circuits.

Feature Summary

• Compact surface-mount design suitable for space-constrained PCB layouts
• High-frequency stability for precise clock signal generation
• Standardized package dimensions for automated assembly compatibility

Applications

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

Procurement Notes

Verify the specific suffix 'MAGE' against official QST documentation to confirm the exact electrical parameters, particularly the 12pF load capacitance and ±30ppm stability at 25°C. Ensure the ordering quantity aligns with manufacturer packaging requirements. Cross-reference the part number with authorized distributors to confirm current availability and lead times, as stock levels for specific crystal variants can fluctuate rapidly.

Selection Notes

Select this component when a 40MHz reference is required in a compact SMD form factor. The 12pF load capacitance must match the oscillator circuit's design specifications to ensure accurate frequency operation. Consider the ±50ppm total frequency tolerance relative to system timing requirements. Verify that the operating temperature range covers the intended application environment, noting the stability variations between 25°C and full range conditions.

Part Context

This part belongs to the QT325S series of quartz crystals from QST, a manufacturer specializing in timing devices. The series offers various frequencies and stability grades within a standardized 3.2x2.5mm footprint. The QT325S-40.000MAGE-T specifically targets applications requiring stable 40MHz oscillation with moderate precision, fitting into the broader portfolio of surface-mount resonators used in consumer electronics and industrial control systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source data. When selecting alternatives, ensure the replacement matches the 40MHz frequency, 3.2x2.5mm package size, 12pF load capacitance, and similar ESR characteristics to maintain circuit performance without redesign.