QT252S-40.000METV-T

Overview

The QT252S-40.000METV-T is a quartz crystal resonator manufactured by QST Products, LLC. It operates at a fundamental frequency of 40 MHz with a load capacitance of 10 pF and an equivalent series resistance of 60 Ohms. The component features a 2.5x2.0 mm surface-mount package with four solder pads. Frequency stability is rated at ±10 ppm at 25°C and ±10 ppm over the operating temperature range of -30°C to +85°C.

Feature Summary

• Seam seal construction for environmental protection
• Surface-mount design suitable for automated assembly
• Wide operating temperature range for industrial applications

Applications

• Industrial control systems requiring precise timing
• Commercial electronic devices needing stable clock signals
• Microcontroller clock sources in compact form factors

Procurement Notes

Verify the manufacturer part number QT252S-40.000METV-T against official QST documentation to ensure authenticity. Confirm that the specified frequency tolerance of ±10 ppm and temperature range of -30°C to +85°C match application requirements. Check for availability status as stock levels may vary. Ensure compatibility with PCB footprint dimensions of 2.5x2.0 mm before procurement.

Selection Notes

Select this component when a 40 MHz reference signal is required with high stability in a small surface-mount package. The ±10 ppm tolerance across the full temperature range makes it suitable for precision timing circuits. Consider the 10 pF load capacitance requirement for oscillator circuit design. Evaluate the 60 Ohm ESR for drive level limitations in the target application.

Part Context

This crystal belongs to the QT252S series from QST, which offers various frequencies and tolerances in a standardized 2.5x2.0 mm package. Similar parts include variants with different frequency stabilities or temperature ranges, such as the QT252S-40.000METE-T. The series provides options for both commercial and industrial temperature grades within the same physical footprint.

Replacement Considerations

Direct substitutes must match the 40 MHz frequency, 10 pF load capacitance, and ±10 ppm stability. Parts like QT252S-40.000MAHQ-T offer similar specifications but may have different tolerance ratings. Verify pin compatibility and thermal characteristics before substitution.