QT216S-25.000MEEV-T

Overview

The QT216S-25.000MEEV-T is a quartz crystal oscillator manufactured by QST, operating at a fundamental frequency of 25 MHz. It features a surface-mount package with four solder pads and no lead construction, designed for automated assembly processes. The component exhibits a frequency tolerance of ±10 ppm and a stability of ±20 ppm over the specified temperature range. It requires an external load capacitance of 8 pF to 10 pF for proper circuit integration. The unit operates within a standard commercial temperature range, ensuring reliable timing performance for digital signal processing applications.

Feature Summary

• Surface-mount design with four solder pads for secure PCB attachment
• High-frequency stability suitable for precision clock generation
• RoHS compliant manufacturing process

Applications

• Microcontroller clock sources
• Digital communication interfaces
• Timing circuits in consumer electronics

Procurement Notes

Verify the specific load capacitance requirement (8 pF or 10 pF) against the target circuit design before procurement, as datasheet variations exist between distributors. Confirm the exact frequency tolerance specification (±10 ppm vs ±30 ppm) required for the application. Ensure the supplier provides official documentation from QST Products to validate authenticity and technical accuracy.

Selection Notes

Select this component when a compact, low-profile crystal is needed for 25 MHz applications. Consider the 4-SMD No Lead package for space-constrained designs requiring reflow soldering compatibility. Evaluate the ±10 ppm tolerance against system jitter requirements. Compare against similar models like QT216S-25.000MAAV-T if different tolerance levels are acceptable.

Part Context

This part belongs to the QT216S series of quartz crystals from QST. The series offers various frequency options and tolerance grades. The QT216S form factor is distinct from larger through-hole crystals, providing a smaller footprint for modern high-density PCB layouts. It serves as a passive resonator element rather than an active oscillator IC.

Replacement Considerations

Direct substitutes include other 25 MHz crystals in 4-SMD packages with matching load capacitance. Models such as QT216S-25.000MAHQ-T may offer alternative tolerance specifications. Verify pinout compatibility and mechanical dimensions before substitution.