QT325S-50.000MEIE-T

Overview

The QT325S-50.000MEIE-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precise timing applications. It operates at a fundamental frequency of 50 MHz with a load capacitance of 12 pF and an equivalent series resistance of 50 Ohms. The component utilizes a 4-SMD, no-lead package with dimensions of 3.2 x 2.5 x 0.7 mm. Frequency stability is specified at ±10 ppm at 25°C and ±20 ppm over the operating temperature range of -40°C to +85°C.

Feature Summary

• Provides stable 50 MHz oscillation for digital circuit timing
• Compact surface-mount design suitable for space-constrained PCB layouts
• Ensures high frequency accuracy across wide industrial temperature ranges

Applications

• Microcontroller clock sources
• Communication module timing references
• Digital signal processing circuits

Procurement Notes

Verify the specific suffix MEIE against official QST documentation to confirm the ±10 ppm/±20 ppm stability profile and 12 pF load capacitance. Ensure the required operating temperature range aligns with the -40°C to +85°C specification. Cross-reference the 4-SMD package dimensions with board layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a 50 MHz reference is required with tight initial tolerance and broad thermal stability. The 12 pF load capacitance must match the oscillator circuit design. Consider the low ESR of 50 Ohms for efficient drive level operation. Evaluate the small form factor against available PCB real estate in dense electronic assemblies.

Part Context

This part belongs to the QT325S family of SMD crystals from QST, characterized by a 3.2x2.5mm footprint. Variants within this series differ primarily in frequency, stability codes, and load capacitance. The MEIE suffix denotes specific performance parameters distinct from other suffixes like MAHJ or MEEQ found in the same product line.

Replacement Considerations

Direct substitutes include other 50 MHz SMD crystals with identical 3.2x2.5mm dimensions, 12 pF load capacitance, and comparable stability ratings. Verify pin compatibility and electrical characteristics such as ESR and drive level sensitivity before swapping manufacturers.