QT325S-12.288MAHQ-T

Overview

The QT325S-12.288MAHQ-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 12.288 MHz with a frequency tolerance and stability of ±30 ppm across the industrial temperature range of -40°C to +85°C. The component features a load capacitance of 10 pF and an equivalent series resistance (ESR) of 80 Ohms. It is housed in a compact 4-SMD, No Lead package with dimensions of 3.20mm x 2.50mm and a maximum seated height of 0.80mm.

Feature Summary

• Surface-mount design utilizing a 4-SMD, No Lead package for automated assembly compatibility
• Industrial-grade temperature stability maintained within -40°C to +85°C operational range
• Optimized for low power consumption with 10 pF load capacitance specification

Applications

• Clock signal generation for microcontrollers and digital processors
• Timing references in communication modules requiring 12.288 MHz frequencies
• Consumer electronics with space-constrained printed circuit board layouts

Procurement Notes

Verify the complete part number QT325S-12.288MAHQ-T against official QST documentation to confirm the specific suffix codes for temperature range and tolerance. Ensure the load capacitance requirement matches the target oscillator circuit design, as variations exist within the QT325S family. Cross-reference the package dimensions and pin configuration with the manufacturer's mechanical drawing to guarantee physical compatibility with the intended footprint.

Selection Notes

Select this component when a 12.288 MHz reference is required for industrial environments spanning -40°C to +85°C. The ±30 ppm stability suits general-purpose timing applications where higher precision is not critical. Consider the 10 pF load capacitance and 80 Ohm ESR values to ensure proper oscillation startup and sustained amplitude in the host circuit design without additional external components.

Part Context

This part belongs to the QT325S series from QST, which offers various frequency and tolerance options within a standardized 3.2mm x 2.5mm SMD form factor. The series provides multiple suffix combinations to address different thermal and accuracy requirements. This specific model addresses the need for reliable timing in cost-sensitive industrial electronics using standard surface-mount technology processes.

Replacement Considerations

Direct substitutes may include other manufacturers offering 12.288 MHz crystals in 3.2x2.5mm packages with ±30 ppm stability. Verify that alternative parts match the 10 pF load capacitance and 80 Ohm ESR specifications to maintain circuit performance. Check for identical mounting dimensions and soldering profile requirements to ensure seamless integration into existing assemblies.