QT325S-27.000MAHV-T

Overview

The QT325S-27.000MAHV-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 27 MHz with a load capacitance of 8 pF and an equivalent series resistance of 50 Ohms. The component utilizes a 4-SMD, No Lead package with dimensions of 3.2 x 2.5 x 0.7 mm. Frequency stability is specified as ±30 ppm over the commercial temperature range of -20°C to +70°C.

Feature Summary

• Seam seal construction for environmental protection
• Low profile surface-mount design
• High frequency stability within specified temperature range

Applications

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

Procurement Notes

Verify the suffix HV against official QST documentation to confirm the specific stability grade and temperature range (-20°C to +70°C). Ensure the load capacitance requirement of the target circuit matches the 8 pF specification. Confirm the 4-SMD no-lead package footprint compatibility with the PCB layout before finalizing procurement orders.

Selection Notes

Select this component when a 27 MHz reference is required in a compact form factor. The 8 pF load capacitance suits circuits with lower parasitic capacitance. Consider the ±30 ppm stability limit for non-critical timing applications where tighter tolerances are not mandated by the system architecture.

Part Context

This part belongs to the QT325S family of seam-seal crystals from QST. Variants within this series differ primarily in operating frequency and stability suffixes. The QT325S designation indicates a standard small outline package suitable for automated assembly processes in high-volume manufacturing environments.

Replacement Considerations

Direct substitutes include other 27 MHz crystals with identical 3.2x2.5mm footprints and 8 pF load capacitance. Verify that alternative manufacturers offer comparable ESR values and stability grades matching the HV suffix specifications.