QT325S-20.000METJ-T

Overview

The QST QT325S-20.000METJ-T is a surface-mount quartz crystal resonator operating at a nominal frequency of 20 MHz. It features a ±10 ppm frequency stability over the -20°C to +70°C temperature range and a ±10 ppm initial tolerance at 25°C. The component utilizes a 4-SMD, No Lead package with dimensions of 3.2mm x 2.5mm x 0.7mm. Key electrical parameters include a load capacitance of 18 pF and an equivalent series resistance (ESR) of 50 Ohms. This device is designed for precision timing applications requiring compact form factors.

Feature Summary

• Compact 4-SMD no-lead package design suitable for space-constrained PCB layouts
• High frequency stability of ±10 ppm across specified industrial temperature ranges
• Optimized low ESR characteristics for efficient oscillator circuit integration

Applications

• Precision clock generation in embedded systems
• Timing references for microcontrollers and digital signal processors
• Communication interface synchronization circuits

Procurement Notes

Verify the specific suffix METJ against official QST documentation to confirm the exact temperature range and tolerance specifications. Ensure compatibility with reflow soldering profiles recommended for 4-SMD no-lead packages. Cross-reference with authorized distributors to confirm current availability and authenticity of the component.

Selection Notes

Select this component when a 20 MHz reference with ±10 ppm stability is required in a small footprint. Compare load capacitance requirements of the host oscillator circuit against the 18 pF specification. Consider thermal performance needs within the -20°C to +70°C range relative to other available tolerance options.

Part Context

This part belongs to the QT325S series of surface-mount crystals from QST. The series offers various frequency and stability options in a standardized 3.2x2.5mm package. The METJ suffix specifically denotes the 20 MHz frequency with ±10 ppm stability over the -20°C to +70°C range and 18 pF load capacitance.

Replacement Considerations

Cross-reference tools may identify parametrically similar parts from other manufacturers. Verify that substitute components match the 18 pF load capacitance and 50 Ohm ESR specifications. Confirm package dimensions and pin configuration compatibility before implementation.