QT325G-20.000MAHJ-T

Overview

The QT325G-20.000MAHJ-T is a surface-mount quartz crystal resonator manufactured by QST Products, LLC. It operates at a fundamental frequency of 20.000 MHz with a ±30 ppm frequency stability over the -20°C to +70°C temperature range. The component features a 4-SMD, no-lead package with dimensions of 3.2mm x 2.5mm x 0.8mm. It utilizes a glass seal construction and has a load capacitance of 18pF. The equivalent series resistance (ESR) is specified at 60 Ohms for this variant.

Feature Summary

• Fundamental mode operation utilizing a glass-sealed quartz resonator element
• Surface-mount design compatible with automated assembly processes
• Stable frequency performance within specified industrial temperature limits

Applications

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

Procurement Notes

Verify the specific suffix codes against official QST documentation to confirm exact electrical parameters such as ESR and stability grade. Ensure the ordering part number matches the required load capacitance and temperature range specifications for the target application environment before procurement.

Selection Notes

Select this component when a 20 MHz fundamental frequency is required in a compact 3.2x2.5mm SMD footprint. Consider the ±30 ppm stability and 18pF load capacitance requirements relative to the host circuit design. Verify compatibility with the operating temperature range of -20°C to +70°C for the intended deployment scenario.

Part Context

This part belongs to the QT325G series of glass-sealed quartz crystals from QST. The series offers various frequency options and stability grades defined by suffix codes. The MAHJ-T designation indicates specific stability and temperature characteristics distinct from other variants like MDDE or MAHQ.

Replacement Considerations

Direct substitutes include other QT325G series parts with identical mechanical dimensions but different frequencies or stability grades, provided the electrical parameters match the circuit requirements. Cross-reference with manufacturer datasheets for pin-compatible alternatives.