QT325S-28.63636MAGK-T

Overview

The QST QT325S-28.63636MAGK-T is a surface-mount quartz crystal resonator designed for precision frequency control in electronic circuits. It operates at a fundamental frequency of 28.63636 MHz and utilizes a 3.2mm x 2.5mm SMD package with four solder pads. The component features a load capacitance of 20pF and maintains a frequency stability of ±30ppm at 25°C and ±50ppm across the industrial temperature range of -40°C to +85°C. It exhibits an equivalent series resistance (ESR) of 50 Ohms, ensuring efficient signal transmission within standard oscillator configurations.

Feature Summary

• Seam-sealed ceramic construction provides robust environmental protection and long-term reliability
• Four-pad surface mount design facilitates automated assembly and secure PCB attachment
• Optimized for high-frequency stability within specified industrial temperature ranges

Applications

• Microcontroller clock sources
• Communication module timing references
• Digital signal processing circuitry

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm exact electrical parameters and tolerance levels. Ensure compatibility with reflow soldering profiles recommended for seam-sealed crystals. Confirm RoHS compliance status through official datasheets prior to integration into regulated assemblies.

Selection Notes

Select this component when a 28.63636 MHz reference is required with moderate stability specifications. Consider the 20pF load capacitance requirement for oscillator circuit design. Evaluate thermal performance needs against the ±50ppm wide-temperature specification before finalizing the bill of materials.

Part Context

This part belongs to the QT325S series of surface-mount quartz crystals manufactured by QST. The series offers various frequencies and package sizes tailored for compact electronic designs. This specific model represents a standard industrial-grade option within the broader product line.

Replacement Considerations

Direct substitutes must match the 28.63636 MHz frequency, 20pF load capacitance, and 3.2x2.5mm footprint. Verify ESR and stability ratings from alternative manufacturers to ensure circuit performance parity.