QT325S-20.000MAHJ-T

Overview

The QT325S-20.000MAHJ-T is a surface mount quartz crystal manufactured by QST Products LLC. It operates at a fundamental frequency of 20 MHz with a load capacitance of 18 pF and an equivalent series resistance of 50 Ohms. The component utilizes a 4-SMD, No Lead package with body dimensions of 3.2 x 2.5 x 0.7 mm. Frequency stability is rated at ±30 ppm at 25°C and ±30 ppm across the operating temperature range of -40°C to +85°C.

Feature Summary

• Seam seal construction for environmental protection
• Surface mount design compatible with automated assembly
• Wide operating temperature range capability

Applications

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

Procurement Notes

Verify the specific suffix MAHJ against official QST documentation to confirm the exact load capacitance and tolerance specifications. Ensure the ordering part number matches the required frequency stability and package type. Cross-reference the manufacturer datasheet for detailed mechanical drawings and soldering profile recommendations before procurement.

Selection Notes

Select this component when a 20 MHz reference is required in space-constrained designs. The 18 pF load capacitance must match the oscillator circuit requirements. Consider the ±30 ppm stability rating relative to system timing accuracy needs. Verify compatibility with the target PCB footprint and reflow soldering processes.

Part Context

This model belongs to the QT325S series of seam seal crystals from QST. These components are designed for high-volume surface mount applications requiring reliable frequency control. The series offers various frequencies and load capacitances within the same compact form factor.

Replacement Considerations

Direct substitutes include other 20 MHz crystals with identical 18 pF load capacitance and 4-SMD no lead packaging. Verify that alternative parts meet the same ±30 ppm stability and -40°C to +85°C temperature range specifications.