QT325G-27.000MDHV-T

Overview

The QT325G-27.000MDHV-T is a surface-mount quartz crystal oscillator manufactured by QST. It operates at a nominal frequency of 27 MHz with a frequency stability of ±30 ppm over the temperature range of -20°C to +70°C. The component features an equivalent series resistance (ESR) of 60 Ohms and requires a load capacitance of 8 pF for proper circuit integration. It utilizes a glass-seal package construction, providing robust environmental protection. The physical dimensions are 3.2 mm x 2.5 mm x 0.8 mm, designed for compact electronic assemblies.

Feature Summary

• Glass-sealed quartz crystal construction for enhanced environmental durability
• Surface-mount design compatible with automated assembly processes
• Stable frequency performance within specified industrial temperature ranges

Applications

• Microcontroller clock sources
• Communication module timing circuits
• Consumer electronics oscillators

Procurement Notes

Verify the specific suffix codes against official QST documentation to confirm exact electrical tolerances and temperature ranges. Ensure the load capacitance requirements match the target circuit design. Confirm RoHS compliance status through current manufacturer declarations. Cross-reference the package dimensions with PCB footprint libraries to prevent mechanical interference during assembly.

Selection Notes

Select this component when a 27 MHz reference signal is required in space-constrained applications. Consider the ±30 ppm stability limit for timing-sensitive designs. Evaluate the 8 pF load capacitance requirement against existing circuit parameters. Assess the operating temperature range against the intended deployment environment to ensure reliable performance.

Part Context

This part belongs to the QT325G family of surface-mount crystals from QST. The family offers various frequency options and tolerance grades. The specific model indicates a 27 MHz output with defined stability characteristics. These components serve as fundamental timing elements in digital systems requiring precise clock generation.

Replacement Considerations

Direct substitutes must match the 27 MHz frequency, 8 pF load capacitance, and 3.2x2.5mm package dimensions. Verify that alternative components meet or exceed the ±30 ppm stability specification. Ensure compatibility with the target ESR value of 60 Ohms. Check for identical mounting pad layouts to facilitate drop-in replacement.