QT325S-27.120MEEQ-T

Overview

The QT325S-27.120MEEQ-T is a quartz crystal resonator manufactured by TXC Corporation, distributed under the QST brand. It operates at a fundamental frequency of 27.12 MHz with a load capacitance of 10 pF and an equivalent series resistance (ESR) of 50 Ohms. The component features a ±10 ppm frequency tolerance and stability within the -20°C to +70°C temperature range. It utilizes a 4-pin CSMD glass-sealed package measuring 3.2 x 2.5 mm, designed for surface-mount assembly on printed circuit boards.

Feature Summary

• Utilizes a compact 3.2 x 2.5 mm glass-sealed SMD package for efficient board space utilization.
• Provides high frequency stability of ±10 ppm across standard operating temperatures.
• Designed for direct surface-mount integration into electronic circuits.

Applications

• Embedded communication systems requiring precise clock signals
• Consumer electronics utilizing 27.12 MHz timing references
• Industrial control modules needing stable oscillator sources

Procurement Notes

Verify that the supplier provides documentation confirming the manufacturer as TXC Corporation, as this part is often distributed through third-party channels like QST. Ensure the ordering suffix matches the specific temperature and tolerance requirements, as variations exist within the QT325S family. Confirm the package type is the 4-pin CSMD variant to ensure compatibility with your PCB footprint design.

Selection Notes

Select this component when a 27.12 MHz fundamental frequency is required with tight ±10 ppm stability constraints. The 10 pF load capacitance must match the oscillator circuit design specifications. Consider the 50 Ohm ESR value for impedance matching in the host circuit. This part is suitable for applications where small form factor and reliable performance are prioritized over extreme temperature ranges.

Part Context

This component belongs to the QT325S series of quartz crystals, characterized by their small glass-sealed SMD packages. The series offers various frequency and tolerance options, with the MEEQ suffix denoting specific electrical parameters including the 27.12 MHz frequency and ±10 ppm stability. These parts are widely used in portable and embedded devices requiring precise timing.

Replacement Considerations

Direct substitutes may include other 27.12 MHz crystals with identical 10 pF load capacitance and similar physical dimensions. Verify that any replacement maintains the 50 Ohm ESR and ±10 ppm stability to ensure circuit compatibility. Check for equivalent package types such as 4-pin CSMD or compatible SMD footprints from other manufacturers offering similar glass-sealed technologies.