QT325S-12.000MEIE-T

Overview

The QST QT325S-12.000MEIE-T is a surface-mount quartz crystal resonator designed for precision timing applications. It operates at a fundamental frequency of 12 MHz with a load capacitance of 12 pF. The component exhibits a frequency stability of ±20 ppm at 25°C and maintains this tolerance across an extended operating temperature range of -40°C to +85°C. Housed in a compact 3.2mm x 2.5mm seam seal package, it utilizes a four-terminal no-lead SMD configuration to ensure reliable mechanical performance and electrical consistency in high-density circuit designs.

Feature Summary

• Seam seal construction provides robust environmental protection and mechanical stability
• Four-terminal no-lead SMD design enhances solder joint reliability and thermal performance
• Fundamental mode operation ensures precise frequency generation at 12 MHz
• Extended temperature stability supports consistent performance in demanding industrial environments

Applications

• Microcontroller clock sources requiring stable timing references
• Communication modules needing precise carrier synchronization
• Industrial control systems operating in wide temperature ranges
• Consumer electronics utilizing compact surface-mount layouts

Procurement Notes

Verify the specific suffix MEIE-T against official QST documentation to confirm the 12pF load capacitance and ±20ppm stability specifications. Ensure the procurement channel provides valid traceability for the seam seal package type. Cross-reference the manufacturer part number with authorized distributor databases to confirm current availability status and prevent substitution with variants having different electrical characteristics or terminal configurations.

Selection Notes

Select this component when a 12 MHz reference is required within a 3.2x2.5mm footprint constraint. The ±20ppm stability rating suits applications where moderate frequency accuracy is sufficient under varying thermal conditions. Consider the four-terminal structure for improved thermal dissipation during reflow processes. Evaluate the 12pF load capacitance requirement against the oscillator circuit design to ensure proper impedance matching and startup reliability without additional external compensation components.

Part Context

This model belongs to the QT325S series of seam seal crystals manufactured by QST. The series is characterized by its small form factor and four-terminal no-lead architecture, which distinguishes it from traditional two-terminal ceramic packages. These components are engineered for high-volume surface mount assembly, offering superior shock resistance compared to standard leaded alternatives while maintaining tight frequency tolerances essential for modern digital timing circuits.

Replacement Considerations

Publicly confirmed substitute part numbers for this specific component are not available in the provided documentation. Verify compatibility with alternative 12 MHz crystals by matching the 12pF load capacitance, ±20ppm stability, and 3.2x2.5mm package dimensions. Ensure any replacement maintains the four-terminal no-lead configuration to preserve thermal and mechanical performance characteristics.