QT325S-25.000MEIV-T

Overview

The QT325S-25.000MEIV-T is a surface-mount quartz crystal resonator manufactured by QST, operating at a fundamental frequency of 25 MHz. It features an 8 pF load capacitance and a maximum equivalent series resistance (ESR) of 50 Ohms. The component exhibits a frequency tolerance of ±10 ppm and a frequency stability of ±20 ppm at +25°C, with stability maintained within ±20 ppm across the industrial temperature range of -40°C to +85°C. It utilizes a 4-SMD, No Lead package with dimensions of 3.2 x 2.5 x 0.7 mm.

Feature Summary

• Seam seal construction for enhanced environmental robustness
• Surface mount design optimized for automated PCB assembly
• Industrial temperature rating ensuring stable operation in extreme conditions

Applications

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

Procurement Notes

Verify the specific suffix MEIV-T against official QST documentation to confirm the exact load capacitance and tolerance specifications. Ensure compatibility with the target PCB footprint and reflow soldering profile requirements. Cross-reference the manufacturing date code and lot traceability if required for quality assurance protocols.

Selection Notes

Select this component when a compact 3.2x2.5 mm form factor is required alongside strict frequency stability needs. The 8 pF load capacitance must match the oscillator circuit design parameters. Consider the -40°C to +85°C operating range for applications exposed to variable thermal environments.

Part Context

This part belongs to the QT325S series of seam seal crystals from QST. These components are designed for high-reliability applications requiring precise timing in space-constrained electronic devices. The series offers various frequency options and tolerance grades to suit different system requirements.

Replacement Considerations

Direct substitutes include the TXC Corporation QT325S-25.000MEIV-T, which shares identical electrical characteristics and physical dimensions. Verify pinout compatibility and mounting orientation before substitution.