QT252S-20.000MAHJ-T

Overview

The QT252S-20.000MAHJ-T is a surface-mount quartz crystal oscillator 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 (ESR) of 100 Ohms. The component features a 4-SMD, No Lead package with dimensions of 2.5x2.0 mm. Frequency stability and tolerance are specified at ±30 ppm across the operating temperature range of -40°C to +85°C. The device utilizes a seam seal construction for environmental protection.

Feature Summary

• Seam seal construction for enhanced environmental durability
• Surface-mount design compatible with automated assembly processes
• Wide operating temperature range supporting industrial applications

Applications

• Clock signal generation in microcontroller circuits
• Timing reference for communication interfaces
• Oscillator circuits in consumer electronic devices

Procurement Notes

Verify the manufacturer designation on official documentation, as this component appears in catalogs under both QST Products, LLC and TXC Corporation due to corporate relationships. Confirm the specific suffix MAHJ-T matches the required load capacitance and stability specifications for your circuit design before ordering. Ensure the package type aligns with your PCB footprint requirements.

Selection Notes

Select this component when a 20 MHz timing source with ±30 ppm stability is required within a compact 2.5x2.0 mm footprint. Consider the 18 pF load capacitance requirement to ensure proper oscillation with the host circuit's internal capacitors. Evaluate the ESR of 100 Ohms against the oscillator circuit's drive level constraints to prevent over-driving the crystal.

Part Context

This part belongs to the QT252S series of miniature seam seal crystals. The series offers various frequencies and load capacitances within the same physical envelope. The QT252S line is designed for high-volume manufacturing applications requiring reliable timing in space-constrained portable and industrial electronics.

Replacement Considerations

Direct substitutes include other 20 MHz crystals with identical 18 pF load capacitance, ±30 ppm stability, and 2.5x2.0 mm SMD package dimensions. Verify that alternative parts meet the same ESR and temperature range specifications to maintain circuit performance.