QT121S-32.000MEEY-T

Overview

The QT121S-32.000MEEY-T is an ultra-miniature, low-profile quartz crystal oscillator manufactured by QST. It operates at a fundamental frequency of 32 MHz with a standard frequency tolerance of ±30 ppm. The component features a load capacitance of 8 pF and utilizes a lead-free 4-SMD, no-lead package design. This specific model variant is engineered for high-reliability applications in military, avionics, space, and high-temperature environments, ensuring stable oscillation within compact form factors suitable for dense circuit board layouts.

Feature Summary

• Ultra-miniature and low-profile physical construction designed for space-constrained electronic assemblies
• Lead-free SMD package configuration supporting automated surface-mount assembly processes
• Optimized for operation in demanding military, avionics, and high-temperature industrial environments

Applications

• Military avionics systems requiring high reliability
• Space-grade electronic equipment
• High-temperature industrial control modules

Procurement Notes

Verify the exact ordering suffix against official QST documentation to confirm mechanical dimensions and material specifications. Ensure compatibility with existing PCB footprints and reflow soldering profiles. Cross-reference the part number with authorized distributors to obtain current datasheets and environmental compliance certificates before finalizing procurement decisions.

Selection Notes

Select this component when strict size limitations and high thermal stability are required. The 32 MHz frequency and 8 pF load capacitance must align with the host microcontroller or oscillator circuit requirements. Consider the ±30 ppm tolerance relative to system timing accuracy needs. Evaluate the 4-SMD package suitability for the intended manufacturing process and environmental operating range.

Part Context

This part belongs to the QT121S series from QST, which specializes in ultra-miniature crystals for high-reliability sectors. The series is distinct from general consumer-grade components, focusing on robust performance in harsh conditions. It complements other QST offerings like the QT3CD and QT325S series, providing specialized solutions for niche applications where standard crystals cannot meet size or temperature constraints.

Replacement Considerations

Direct substitutes include equivalent 32 MHz crystals with identical 4-SMD footprint and 8 pF load capacitance. Verify that alternative parts meet the same ±30 ppm tolerance and high-temperature operational ratings. Ensure the replacement maintains the lead-free specification and low-profile height to fit within the original enclosure constraints without mechanical interference.