QT325S-12.000MEEK-T

Overview

The QST QT325S-12.000MEEK-T is a surface-mount quartz crystal resonator with a nominal frequency of 12 MHz. It features a 4-SMD, no-lead package measuring 3.2 x 2.5 mm. The component exhibits a frequency tolerance and stability of ±10 ppm at 25°C, and ±10 ppm across the -20°C to 70°C operating temperature range. It utilizes a load capacitance of 20 pF and has an equivalent series resistance (ESR) of 80 Ohms maximum.

Feature Summary

• Seam seal construction for environmental protection
• High frequency stability within specified temperature ranges
• Compact surface-mount footprint for automated assembly

Applications

• Embedded communication systems
• Microcontroller clock sources
• Consumer electronic timing circuits

Procurement Notes

Verify the specific suffix MEEK against official QST documentation to confirm the exact temperature range and tolerance specifications. Ensure the ordering part number matches the required load capacitance and ESR values for the target circuit design before finalizing procurement.

Selection Notes

Select this component when a small form factor is required alongside tight frequency stability. Compare the 20pF load capacitance requirement against the host circuit's parasitic capacitance. Verify that the 80 Ohm ESR limit aligns with the oscillator circuit's drive level constraints.

Part Context

This part belongs to the QT325S series of seam-seal crystals from QST. These components are designed for applications requiring reliable performance in compact spaces. The series offers various frequency options and stability grades tailored for modern consumer electronics.

Replacement Considerations

Direct substitutes must match the 12 MHz frequency, 3.2x2.5mm package, and ±10ppm stability. Verify compatibility with the 20pF load capacitance and 80 Ohm ESR limits. Cross-reference with other manufacturers' 3250-sized crystals.