QT325S-36.000MAAJ-T

Overview

The QT325S-36.000MAAJ-T is a surface-mount passive crystal manufactured by QST. It operates at a nominal frequency of 36MHz with a standard load capacitance of 18pF. The component exhibits a frequency stability of ±30ppm within the commercial temperature range of -20°C to +70°C. Its physical dimensions are 3.2mm x 2.5mm x 0.7mm, and it features an equivalent series resistance (ESR) of 50Ω. This device is designed for precision timing applications requiring compact packaging.

Feature Summary

• Compact surface-mount design suitable for space-constrained PCB layouts
• Passive crystal construction providing stable oscillation frequencies
• Standardized package dimensions facilitating automated assembly processes

Applications

• Microcontroller clock sources
• Communication module timing circuits
• Digital signal processing systems

Procurement Notes

Verify the specific suffix 'MAAJ' against official QST documentation to confirm the 18pF load capacitance requirement. Ensure the operating environment remains within the specified -20°C to +70°C range to maintain the stated ±30ppm stability. Cross-reference the ESR value of 50Ω with the host circuit's drive level specifications to prevent over-driving or insufficient oscillation conditions during integration.

Selection Notes

Select this component when a 36MHz reference is required in a small SMD footprint. The 18pF load capacitance must match the oscillator circuit design. Consider the ±30ppm stability limit for applications where tighter tolerance is unnecessary. Evaluate the commercial temperature range suitability against the final product's environmental exposure requirements before finalizing the bill of materials.

Part Context

This part belongs to the QT325S series of surface-mount crystals from QST. The series offers various frequency options and stability grades. The MA suffix indicates specific stability and temperature characteristics defined by the manufacturer. These components are widely used in consumer electronics and industrial control systems requiring reliable timing references.

Replacement Considerations

Direct substitutes include other 36MHz SMD crystals with identical 3.2x2.5mm dimensions and 18pF load capacitance. Verify that alternative parts meet the same ±30ppm stability and 50Ω ESR specifications. Ensure the replacement supports the -20°C to +70°C operating range without derating.