QT325S-13.560MAHE-T

Overview

The QT325S-13.560MAHE-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 13.56 MHz with a frequency tolerance and stability of ±30 ppm within the -40°C to +85°C temperature range. The component features a load capacitance of 12 pF and an equivalent series resistance (ESR) of 80 Ohms. It utilizes a glass-sealed package with dimensions of 3.2 x 2.5 x 0.7 mm and employs a four-SMD no-lead terminal configuration for reliable integration into compact electronic circuits.

Feature Summary

• Utilizes a glass-sealed construction for enhanced environmental stability and long-term reliability in surface-mount designs.
• Provides precise frequency control at 13.56 MHz with specified stability across a wide industrial temperature range.
• Features a compact 4-SMD no-lead footprint optimized for automated assembly and space-constrained PCB layouts.

Applications

• RFID reader and writer oscillator circuits
• Wireless communication module clock sources
• Industrial control system timing references

Procurement Notes

Verify the specific suffix 'MAHE' against official QST documentation to confirm the exact temperature range (-40°C to +85°C) and tolerance (+/- 30 ppm). Ensure the ordering part number matches the required load capacitance of 12pF and ESR of 80 Ohms. Cross-reference the package dimensions (3.2x2.5mm) with the target PCB footprint to guarantee mechanical compatibility before procurement.

Selection Notes

Select this component when a stable 13.56 MHz reference is required for RFID or wireless applications within harsh thermal environments. The +/- 30 ppm stability suits general-purpose timing needs, while the glass seal offers superior protection compared to standard epoxy packages. Consider the 80 Ohm ESR value for oscillator circuit design to ensure proper startup conditions and signal integrity.

Part Context

This part belongs to the QT325S family of surface-mount crystals from QST. The model designation indicates a 13.56 MHz frequency, 12pF load capacitance, and specific thermal/structural characteristics defined by the suffix. It serves as a fundamental timing element for high-frequency digital and RF systems requiring compact form factors.

Replacement Considerations

Direct substitutes include other 13.56 MHz SMD crystals with identical 3.2x2.5mm footprints, 12pF load capacitance, and comparable ESR values. Verify that alternative manufacturers offer matching temperature stability specifications for the -40°C to +85°C range to maintain system performance equivalence.