QT325G-25.000MEIY-T

Overview

The QT325G-25.000MEIY-T is a surface-mount crystal oscillator manufactured by QST, operating at a nominal frequency of 25 MHz. It features a resonator tolerance of ±10 ppm and a frequency stability of ±20 ppm within the temperature range of -20°C to +70°C. The component utilizes a load capacitance of 7 pF and exhibits an equivalent series resistance (ESR) of 60 Ohms. Its physical dimensions are 3.2 mm x 2.5 mm x 0.8 mm in a four-terminal SMD package without leads. This device is designed for precision timing applications requiring stable frequency generation.

Feature Summary

• Provides precise frequency generation with ±10 ppm tolerance for accurate timing control
• Ensures stable operation across industrial temperature ranges with ±20 ppm stability
• Features compact four-terminal SMD packaging for efficient surface-mount assembly

Applications

• Precision timing circuits in embedded systems
• Microcontroller clock sources requiring high stability
• Communication modules needing accurate frequency references

Procurement Notes

Verify the specific suffix 'MEIY' against official QST documentation to confirm the exact temperature range and stability specifications. Ensure the ordering part number matches the required load capacitance and ESR values for your circuit design. Cross-reference the datasheet to validate the package dimensions and terminal configuration before procurement.

Selection Notes

Select this component when a 25 MHz reference with ±10 ppm tolerance is required. Consider the 7 pF load capacitance compatibility with your oscillator circuit. Evaluate the -20°C to +70°C operational range against your environmental conditions. The 60 Ohm ESR must align with your driver circuit capabilities.

Part Context

This part belongs to the QT325G series of surface-mount crystals from QST. The series offers various stability and temperature options denoted by suffix letters. The MEIY suffix specifically indicates the ±10 ppm tolerance and ±20 ppm stability profile. It serves as a fundamental timing element in electronic designs requiring reliable frequency standards.

Replacement Considerations

Direct substitutes include other QT325G variants with matching electrical parameters. Verify that alternative parts maintain the same 7 pF load capacitance and 60 Ohm ESR. Ensure replacement components support the same 3.2x2.5mm footprint and pin configuration for mechanical compatibility.