QT325G-27.120MAHE-T

Overview

The QT325G-27.120MAHE-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 27.12 MHz with a frequency tolerance and stability of ±30ppm. The component features a load capacitance of 12pF and an equivalent series resistance (ESR) of 60 Ohms. It utilizes a glass-sealed package configuration to ensure environmental reliability. The physical dimensions are specified as 3.2mm x 2.5mm in a 4-SMD, No Lead package format, suitable for automated assembly processes.

Feature Summary

• Glass-sealed construction for enhanced environmental protection
• Surface-mount design compatible with standard SMD assembly
• Stable frequency performance within specified tolerance limits

Applications

• General-purpose clock generation circuits
• Microcontroller oscillator interfaces
• Communication module timing references

Procurement Notes

Verify the specific suffix HE against official QST documentation to confirm exact electrical parameters and packaging details. Ensure compatibility with target circuit load capacitance requirements. Confirm RoHS compliance status through current manufacturer declarations. Cross-reference part numbers with authorized distributors to avoid counterfeit components. Validate storage and handling conditions according to datasheet specifications prior to soldering.

Selection Notes

Select this component when a 27.12 MHz reference signal is required with moderate stability needs. The 12pF load capacitance must match the oscillator circuit design. Consider the 60 Ohm ESR value for power consumption analysis. The 3.2x2.5mm footprint requires adequate PCB space allocation. Evaluate thermal stability requirements against the ±30ppm specification for the operating environment.

Part Context

This part belongs to the QT325G series of quartz crystals from QST Products, LLC. The series offers various frequency options in a standardized small outline package. The glass-seal technology distinguishes these components from epoxy-sealed alternatives, providing better long-term stability. The model number encodes frequency, tolerance, and package type information.

Replacement Considerations

Direct substitutes include variants with identical electrical characteristics such as QT325G-27.120MAHJ-T or QT325G-27.120MAHV-T, provided load capacitance matches. Verify pinout compatibility and mechanical dimensions before substitution. Consult QST documentation for cross-reference lists.