QT325S-14.31818MAAE-T

Overview

The QT325S-14.31818MAAE-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 14.31818 MHz with a load capacitance of 12 pF and an equivalent series resistance of 80 Ohms. The component features a ±30 ppm tolerance and stability within the -20°C to +70°C operating temperature range. Packaged in a compact 4-SMD, no-lead CSMD form factor, it utilizes tin-plated terminals for reliable soldering.

Feature Summary

• Compact 4-pin surface-mount design suitable for space-constrained PCB layouts
• Fundamental mode operation providing stable oscillation at 14.31818 MHz
• Integrated load capacitance specification simplifies circuit design requirements

Applications

• Embedded communication systems requiring precise clock signals
• Microcontroller oscillator circuits
• Digital signal processing hardware

Procurement Notes

Verify the specific suffix 'AAE' corresponds to the required ±30 ppm stability over the -20°C to +70°C range. Confirm the 12 pF load capacitance matches the target oscillator circuit design. Ensure the 4-SMD no-lead package aligns with the board's assembly capabilities. Cross-reference manufacturer datasheets to validate electrical parameters before integration.

Selection Notes

Select this component when a 14.31818 MHz reference is needed with moderate stability requirements. The 80 Ohm ESR suits standard oscillator topologies. Consider thermal constraints as the operating range is limited to industrial temperatures. Compare against higher stability variants if environmental conditions exceed the specified limits.

Part Context

This part belongs to the QT325S series of thin-film quartz crystals from QST. These components are engineered for high-frequency precision in consumer and industrial electronics. The series offers various stability grades and temperature ranges, allowing designers to balance performance needs with cost efficiency for mass-produced devices.

Replacement Considerations

The QT325S-14.31818MAHE-T serves as a potential substitute, offering identical frequency and package but differing in temperature stability specifications. Verify that the alternative's ESR and load capacitance remain compatible with the existing oscillator circuit to ensure proper startup and sustained operation.