QT325S-50.000MEIV-T

Overview

The QT325S-50.000MEIV-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precision timing applications. It operates at a fundamental frequency of 50 MHz with a load capacitance of 8 pF and an equivalent series resistance of 50 Ohms. The component features a ±10 ppm tolerance and ±20 ppm stability over the operating temperature range of -40°C to +85°C. Housed in a compact 4-pin CSMD package measuring 3.20mm x 2.50mm, it utilizes seam seal technology for environmental protection.

Feature Summary

• Seam seal construction provides robust environmental protection for the quartz element
• Fundamental mode operation ensures stable oscillation at 50 MHz
• Compact 4-pin surface mount design facilitates automated PCB assembly

Applications

• Embedded communication systems requiring precise clock synchronization
• Digital signal processing controllers needing stable timing references
• Microcontroller unit clock sources in consumer electronics

Procurement Notes

Verify that the specific suffix MEIV corresponds to the required ±10 ppm tolerance and -40°C to +85°C temperature range. Confirm the 8 pF load capacitance matches the circuit design requirements. Ensure the 4-pin CSMD footprint aligns with the target PCB layout specifications before finalizing procurement orders.

Selection Notes

Select this component when a 50 MHz fundamental frequency is required with tight stability constraints. The 8 pF load capacitance must match the oscillator circuit's input capacitance. Consider the 50 Ohm ESR for drive level limitations. The wide temperature range suits industrial or automotive environments where thermal stability is critical for system performance.

Part Context

This part belongs to the QT325S family of quartz crystals, characterized by small form factor and high reliability. The MEIV suffix denotes specific electrical parameters including tolerance and temperature range. It serves as a passive timing element within active oscillator circuits, providing the reference frequency for digital logic and communication interfaces.

Replacement Considerations

Direct substitutes include TXC Corporation part numbers such as QT325S-50.000MEIJ-T, which share similar dimensions but may differ in load capacitance or stability specifications. Verify all electrical parameters against the original datasheet before substitution.