QT325S-12.000MDII-T

Overview

The QT325S-12.000MDII-T is a surface-mount quartz crystal manufactured by QST, 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 operating temperature range of -40°C to +85°C. It utilizes a 3.2mm x 2.5mm SMD package with four solder pads and features a ceramic construction with seam sealing technology. This design ensures reliable performance in demanding electronic environments while supporting standard surface-mount assembly processes.

Feature Summary

• Seam-sealed ceramic construction provides enhanced environmental protection against moisture and contaminants compared to standard plastic packages.
• Four-pad SMD footprint facilitates robust mechanical attachment and efficient automated surface-mount assembly.
• Fundamental mode operation supports stable oscillation within the specified industrial temperature range.

Applications

• Microcontroller clock references
• Communication interface timing
• Industrial control systems

Procurement Notes

Verify the specific suffix 'MDII' against the manufacturer's current datasheet to confirm exact electrical tolerances and packaging specifications. Ensure compatibility with the target circuit's load capacitance requirements before finalizing procurement orders.

Selection Notes

Select this component when a 12 MHz reference is required with ±20 ppm stability over a wide industrial temperature range. The 12 pF load capacitance matches common oscillator circuits without requiring external adjustment capacitors.

Part Context

This part belongs to the QT325S series of seam-sealed crystals from QST. The series offers various frequency and stability options within the compact 3225 package, catering to both consumer and industrial electronics markets.

Replacement Considerations

Consult official substitution lists for equivalent parts with matching frequency, load capacitance, and stability ratings. Verify pinout and package dimensions if replacing with components from other manufacturers.