QT325G-25.000MEIE-T

Overview

The QT325G-25.000MEIE-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precision timing applications. It operates at a fundamental frequency of 25 MHz with a load capacitance of 18 pF and an equivalent series resistance (ESR) of 60 Ohms. The component exhibits a frequency stability of ±10 ppm within the operating temperature range of -20°C to +70°C. Its physical dimensions are 3.2 mm in length, 2.5 mm in width, and 0.8 mm in height, utilizing a standard four-terminal SMD package configuration suitable for automated assembly processes.

Feature Summary

• Provides high-frequency stability of ±10 ppm across the specified industrial temperature range
• Utilizes a compact 3.2mm x 2.5mm surface-mount footprint for space-constrained designs
• Features low equivalent series resistance for efficient circuit integration

Applications

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

Procurement Notes

Verify the specific suffix 'MEIE' against official QST documentation to confirm the exact electrical parameters, particularly the load capacitance and tolerance class. Ensure the requested quantity matches the manufacturer's standard reel packaging requirements. Cross-reference the part number with authorized distributors to confirm current availability and authenticity before finalizing procurement orders.

Selection Notes

Select this component when a 25 MHz reference with ±10 ppm stability is required for -20°C to +70°C environments. Compare the 18 pF load capacitance requirement against the target circuit design to ensure proper oscillation. Consider the 60 Ohm ESR value relative to the oscillator driver strength. Evaluate the 3.2x2.5mm package size against available PCB real estate constraints.

Part Context

This part belongs to the QT325G series of surface-mount crystals from QST. The series offers various stability grades and temperature ranges defined by alphanumeric suffixes. The QT325G line is engineered for general-purpose digital electronics requiring reliable frequency generation in compact form factors.

Replacement Considerations

Direct substitutes include other 25 MHz SMD crystals with identical 3.2x2.5mm dimensions, 18 pF load capacitance, and ±10 ppm stability. Verify that alternative parts meet the same -20°C to +70°C operating temperature range and have comparable ESR values to ensure circuit compatibility.