QT325S-27.000MEIE-T

Overview

The QT325S-27.000MEIE-T is a quartz crystal resonator manufactured by QST, operating at a fundamental frequency of 27 MHz. This component utilizes a surface-mount device (SMD) package with dimensions of 3.2mm x 2.5mm x 0.7mm. It features a load capacitance of 10 pF and an equivalent series resistance (ESR) typically rated at 50 Ohms. The frequency stability is specified as ±10 ppm over the temperature range of -20°C to +70°C, ensuring reliable performance in standard commercial applications requiring precise timing signals.

Feature Summary

• Provides stable 27 MHz oscillation for digital circuit timing
• Compact SMD footprint suitable for space-constrained designs
• High frequency accuracy with ±10 ppm stability

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 ±10 ppm stability rating and -20°C to +70°C temperature range. Ensure the load capacitance requirement matches the target circuit design, as variations exist within the QT325S family. Confirm package dimensions align with PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when a 27 MHz reference with high precision is required for commercial-grade environments. The ±10 ppm stability offers tighter tolerance than standard ±30 ppm variants. Verify that the 10 pF load capacitance is compatible with the oscillator circuit's input capacitance to maintain accurate frequency output.

Part Context

This part belongs to the QT325S series of thin-film or bulk acoustic wave crystals from QST. The series offers various frequency and stability options in a standardized 3250-sized SMD package. The MEIE suffix denotes specific stability and temperature characteristics distinct from other suffixes like MAHE or MDDK within the same product line.

Replacement Considerations

Direct substitutes must match the 27 MHz frequency, 10 pF load capacitance, and ±10 ppm stability. Cross-reference with other manufacturers offering 3250 SMD crystals with identical electrical parameters to ensure pin compatibility and thermal performance equivalence.