QT325S-19.440MEIC-T

Overview

The QT325S-19.440MEIC-T is a surface-mount quartz crystal resonator manufactured by QST Products, LLC. It operates at a fundamental frequency of 19.44 MHz and utilizes a 4-SMD, No Lead package with dimensions of 3.2mm x 2.5mm x 0.7mm. The component features a load capacitance of 10pF and exhibits a frequency stability of ±10ppm within the operating temperature range of -20°C to +70°C. This specific variant is designed for precision timing applications requiring stable oscillation in compact electronic assemblies.

Feature Summary

• Compact surface-mount design suitable for space-constrained PCB layouts
• High frequency stability ensuring precise timing accuracy
• Robust construction for reliable operation across specified industrial temperatures

Applications

• Microcontroller clock sources
• Communication interface timing circuits
• Embedded system oscillators

Procurement Notes

Verify the exact suffix 'IC' against official QST documentation to confirm the specific tolerance and temperature range parameters. Ensure compatibility with reflow soldering profiles recommended for 4-SMD no-lead packages. Cross-reference the load capacitance requirements with the target circuit design to maintain frequency accuracy.

Selection Notes

Select this component when a 19.44 MHz fundamental frequency is required for data communication standards or specific microcontroller peripherals. Consider the ±10ppm stability requirement against system jitter specifications. Evaluate the physical footprint constraints against available board space for 3.2x2.5mm components.

Part Context

This part belongs to the QT325S series of surface-mount crystals from QST Products. The series offers various frequencies and stability grades, identified by alphanumeric suffixes indicating tolerance and temperature ranges. The QT325S line provides alternatives to traditional through-hole crystals in modern high-density electronics.

Replacement Considerations

Direct substitutes must match the 19.44 MHz frequency, 10pF load capacitance, and 4-SMD no-lead package. Verify equivalent stability ratings (±10ppm) and temperature ranges (-20°C to +70°C). Check manufacturer datasheets for pin-compatible alternatives from other suppliers offering similar SMD crystal specifications.