QT325S-40.000METE-T

Overview

The QT325S-40.000METE-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 40 MHz with a nominal load capacitance of 18 pF and a maximum equivalent series resistance of 50 Ohms. The component utilizes a 4-SMD, No Lead package with dimensions of 3.2 mm x 2.5 mm. Frequency stability is specified at ±10 ppm across the operating temperature range of -30°C to +85°C, ensuring reliable clock signal generation for precision electronic circuits.

Feature Summary

• Provides stable 40 MHz oscillation with high frequency tolerance
• Features a compact 4-SMD no-lead surface mount package
• Maintains stability within specified limits across industrial temperature ranges

Applications

• Microcontroller clock sources
• Communication module timing references
• Industrial control system oscillators

Procurement Notes

Verify the complete part number including suffixes against official manufacturer documentation to ensure correct frequency tolerance and temperature range specifications. Confirm package compatibility and soldering profile requirements prior to integration into production assemblies.

Selection Notes

Select this component when a 40 MHz reference is required in a small footprint. Ensure the application circuit supports an 18 pF load capacitance. Verify that the operational environment remains within the -30°C to +85°C range to maintain the guaranteed ±10 ppm stability specification.

Part Context

This model belongs to the QT325S series of quartz crystals from QST. The series offers various frequency options and stability grades in a standardized 3225 SMD form factor, catering to designs requiring precise timing without the volume constraints of larger through-hole packages.

Replacement Considerations

Cross-reference with other 3225 SMD crystals offering 40 MHz operation and ±10 ppm stability at -30°C to +85°C. Verify electrical parameters such as load capacitance and ESR before substitution.