QT252S-40.000MEIE-T

Overview

The QT252S-40.000MEIE-T is a surface-mount quartz crystal manufactured by QST Corporation, designed for precision timing applications. It operates at a fundamental frequency of 40 MHz with a load capacitance of 8 pF. The component features a compact 2.50mm x 2.00mm SMD package with four solder pads and no lead construction. Frequency stability is specified at ±10 ppm across the operating temperature range of -40°C to +85°C, ensuring reliable performance in demanding electronic environments.

Feature Summary

• Seam seal construction utilizing ceramic material for enhanced environmental protection
• Surface mount design with four-pad configuration for automated assembly compatibility
• High frequency stability specification suitable for precise clock signal generation

Applications

• Digital communication systems requiring stable clock references
• Microcontroller unit oscillator circuits
• Consumer electronics with strict timing requirements

Procurement Notes

Verify manufacturer authenticity through authorized distribution channels. Confirm that the ordering suffix matches the required load capacitance and stability specifications. Ensure storage conditions comply with moisture sensitivity levels prior to reflow soldering. Validate component markings against official datasheet documentation to prevent counterfeit substitution.

Selection Notes

Select this component when a 40 MHz frequency is required with ±10 ppm stability over industrial temperatures. The 8 pF load capacitance must match the oscillator circuit design. Consider the 2.5x2.0 mm footprint for space-constrained PCB layouts. Verify compatibility with standard surface mount reflow profiles during the design phase.

Part Context

This part belongs to the QT252S series of seam seal crystals from QST Corporation. The series offers various frequencies and stability options within a standardized small outline package. These components are engineered for high-volume manufacturing processes and provide consistent electrical characteristics across production batches.

Replacement Considerations

Direct substitutes include other 40 MHz crystals with identical 2.5x2.0 mm dimensions and 8 pF load capacitance. Verify equivalent stability ratings and operating temperature ranges before substitution. Cross-reference pin configurations and mounting pad layouts to ensure mechanical compatibility.