QT325S-14.31818MAHE-T

Overview

The QST QT325S-14.31818MAHE-T is a quartz crystal resonator operating at a fundamental frequency of 14.31818 MHz. It features a load capacitance of 12 pF and an equivalent series resistance (ESR) of 80 Ohms. The component utilizes a 4-SMD, No Lead package with dimensions of 3.2 x 2.5 x 0.7 mm. Frequency tolerance is specified at ±30 ppm at 25°C and ±30 ppm across the industrial temperature range of -40°C to +85°C.

Feature Summary

• Compact surface-mount design suitable for space-constrained PCB layouts
• Industrial temperature stability ensuring consistent performance in varying thermal environments
• Standardized SMD footprint facilitating automated assembly processes

Applications

• Clock generation for digital signal processors
• Microcontroller system timing references
• Communication interface synchronization circuits

Procurement Notes

Verify the specific suffix HE 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. Cross-reference manufacturer datasheets to validate package dimensions and soldering recommendations before procurement.

Selection Notes

Select this component when a precise 14.31818 MHz reference is required for digital logic or communication interfaces. Consider the 80 Ohm ESR and 12 pF load capacitance to ensure oscillator circuit stability. Evaluate the ±30 ppm tolerance against system clock accuracy requirements within the -40°C to +85°C operational range.

Part Context

This part belongs to the QT325S series of surface-mount crystals from QST. The series offers various frequency options and tolerance grades, identified by suffix letters such as H for the -40°C to +85°C range. The 325S form factor represents a standard small-size package widely used in consumer electronics and industrial control systems.

Replacement Considerations

Direct substitutes must match the 14.31818 MHz frequency, 12 pF load capacitance, and 4-SMD no-lead package. Verify that alternative manufacturers offer components with comparable ESR and frequency stability within the specified temperature range to maintain circuit performance.