QT325S-27.120MAHE-T

Overview

The QST QT325S-27.120MAHE-T is a surface-mount crystal oscillator operating at a fundamental frequency of 27.12 MHz. It features a compact 4-SMD, no-lead package with dimensions of 3.2 x 2.5 x 0.7 mm. The component has a load capacitance of 12 pF and an equivalent series resistance of 50 Ohms. Frequency stability is rated at ±30 ppm over the temperature range of -40°C to +85°C. The device utilizes the QT325S series design for reliable signal generation in electronic circuits.

Feature Summary

• Compact surface-mount footprint suitable for space-constrained designs
• High frequency stability within specified industrial temperature ranges
• Integrated no-lead package construction for automated assembly

Applications

• Embedded communication systems requiring precise clock signals
• Microcontroller-based digital circuitry
• Consumer electronics with limited board space

Procurement Notes

Verify the complete part number including suffixes to ensure correct tolerance and temperature rating specifications. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Inspect components for physical damage upon receipt. Cross-reference datasheet parameters against system requirements before integration to avoid compatibility issues.

Selection Notes

Choose this component when a 27.12 MHz reference is required in a small SMD form factor. The ±30 ppm stability suits general-purpose applications where extreme precision is not critical. Consider the 12 pF load capacitance requirement for oscillator circuit design. Evaluate thermal performance needs against the -40°C to +85°C operational range.

Part Context

This crystal belongs to the QT325S series from QST, designed for high-reliability timing applications. The series offers various frequency and tolerance options within a standardized 3.2x2.5mm package. It serves as a core timing element for digital systems requiring stable oscillation without the complexity of active oscillators.

Replacement Considerations

Direct substitutes must match the 27.12 MHz frequency, 12 pF load capacitance, and 3.2x2.5mm package dimensions. Verify that alternative crystals offer equal or better frequency stability within the -40°C to +85°C range. Ensure equivalent ESR values to maintain oscillator startup conditions.