QT49-13.560MAHE-B

Overview

The QT49-13.560MAHE-B is a quartz crystal resonator manufactured by QST Products, LLC. It operates at a fundamental frequency of 13.56 MHz and utilizes the HC-49 package style. The component features a load capacitance of 12 pF and a maximum series resistance of 30 Ohms. Frequency stability is maintained within ±30 ppm at 25°C and ±30 ppm across the operating temperature range of -20°C to +70°C. The device supports through-hole mounting with body dimensions of approximately 11.5 x 5 x 3.68 mm.

Feature Summary

• Provides stable oscillation at 13.56 MHz for RFID and wireless communication applications
• Maintains tight frequency tolerance of ±30 ppm across industrial temperature ranges
• Designed for reliable performance in standard through-hole circuit layouts

Applications

• RFID reader oscillator circuits
• Wireless communication transceivers
• Industrial control system timing references

Procurement Notes

Verify the specific suffix HE against official QST documentation to confirm the 12 pF load capacitance specification, as other variants in the QT49 series may utilize different capacitance values such as 18 pF. Ensure the ordering part number matches the required frequency stability and temperature range parameters before procurement to avoid functional mismatches in precision timing applications.

Selection Notes

Select this component when a 13.56 MHz reference is required for ISO 14443 compliant systems or similar wireless standards. The HC-49 package offers robust mechanical stability for through-hole assembly processes. Confirm that the 12 pF load capacitance aligns with the host oscillator circuit design requirements to ensure accurate frequency generation without external trimming adjustments.

Part Context

This crystal belongs to the QT49 series from QST Products, which provides various fundamental mode quartz resonators. The series covers frequencies ranging from low kilohertz to high megahertz ranges, utilizing standardized HC-49/U housings. These components are engineered for general-purpose timing applications where moderate stability and cost-effectiveness are prioritized over ultra-high precision specifications found in oven-controlled variants.

Replacement Considerations

Direct substitutes include the QT49-13.560MAAJ-B, which shares the same frequency but differs in load capacitance (18 pF vs 12 pF). Verify circuit compatibility before substitution, as differing load capacitances can shift the operating frequency. Other generic HC-49/US crystals meeting 13.56 MHz, 30 Ohm ESR, and ±30 ppm stability criteria may serve as alternatives if pinout and dimensional tolerances match.