QT325S-20.000MEEE-T

Overview

The QT325S-20.000MEEE-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 20 MHz with a load capacitance of 10 pF and an equivalent series resistance of 50 Ohms. The component utilizes a 4-SMD, No Lead package configuration, specifically a 3.2mm x 2.5mm footprint. Frequency stability is rated at ±10 ppm within the temperature range of -20°C to +70°C. This device serves as a precise timing reference for electronic circuits requiring stable clock signals.

Feature Summary

• Surface-mount quartz crystal resonator with seam seal construction
• High frequency stability of ±10 ppm over specified industrial temperature range
• Compact 4-SMD no-lead package suitable for automated assembly

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics internal clocks

Procurement Notes

Verify the exact suffix 'MEEE' against official QST documentation to confirm the specific temperature range and stability rating, as suffix variations denote different performance characteristics. Ensure the ordering part number matches the required load capacitance and package dimensions for PCB compatibility. Cross-reference with authorized distributors to confirm current availability and authenticity.

Selection Notes

Select this component when a 20 MHz surface-mount crystal with ±10 ppm stability between -20°C and +70°C is required. Consider the 10 pF load capacitance requirement for circuit design matching. Evaluate the 4-SMD no-lead form factor against available board space and reflow soldering capabilities compared to through-hole alternatives.

Part Context

This part belongs to the QT325S series of quartz crystals from QST, which are widely used in timing applications. The series offers various frequency options and stability grades distinguished by alphanumeric suffixes. These components are standard timing devices for general-purpose electronics, providing reliable oscillation frequencies for digital systems.

Replacement Considerations

Compatible substitutes include other 20 MHz SMD crystals with identical 3.2x2.5mm dimensions, 10pF load capacitance, and ±10 ppm stability. Verify that alternative manufacturers offer the same 4-SMD no-lead package and similar ESR values to ensure electrical equivalence without redesign.