QT252S-20.000MAAV-T

Overview

The QT252S-20.000MAAV-T is a surface-mount quartz crystal resonator manufactured by QST. It operates at a fundamental frequency of 20 MHz with a load capacitance of 8 pF and an equivalent series resistance of 100 Ohms. The component features a 4-SMD, No Lead package with dimensions of 2.5 x 2.0 x 0.55 mm. Frequency stability is rated at ±30 ppm across the operating temperature range of -20°C to +70°C.

Feature Summary

• Seam seal construction for environmental protection
• Surface mount design compatible with automated assembly
• Stable frequency performance within specified thermal limits

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronic circuit synchronization

Procurement Notes

Verify the manufacturer designation carefully, as similar part numbers exist from TXC Corporation within the same QT252S series. Confirm that the specific suffix AAV corresponds to the QST manufacturing origin rather than other suppliers offering identical electrical specifications. Ensure the datasheet matches the required 8 pF load capacitance and 100 Ohm ESR for your circuit design.

Selection Notes

Select this component when a 20 MHz reference is required in a compact 2.5x2.0 mm footprint. The ±30 ppm stability suits general-purpose applications where high precision is not critical. Verify compatibility with the target PCB layout for 4-terminal SMD mounting and ensure the operating temperature range meets the environmental requirements of the final device.

Part Context

This crystal belongs to the QT252S family of seam-seal quartz resonators. These components are designed for high-volume surface mount production. The series offers various frequencies and stability grades, with this specific model providing a standard 20 MHz output suitable for common digital logic and communication interfaces requiring moderate frequency accuracy.

Replacement Considerations

QT252S-20.000MDDQ-T (TXC) offers similar dimensions but differs in load capacitance (10 pF) and stability (-20 to 70°C). QT252S-20.000MAHE-T (TXC) provides wider temperature range (-40 to 85°C) but uses 12 pF load capacitance. Direct substitution requires verifying circuit loading conditions.