QT325G-13.560MAGE-T

Overview

The QT325G-13.560MAGE-T is a surface-mount quartz crystal resonator manufactured by QST, designed for the 13.56 MHz frequency band commonly used in RFID and NFC applications. It features a 4-pin CSMD package with dimensions of 3.2mm x 2.5mm and a maximum seated height of 0.90mm. The component operates in fundamental mode with a load capacitance of 12pF and an equivalent series resistance (ESR) of 100 Ohms. Frequency tolerance is specified at ±30ppm, while frequency stability is rated at ±50ppm over the operating temperature range of -20°C to +70°C.

Feature Summary

• Surface mount design with glass seal construction for environmental robustness
• Optimized for 13.56 MHz RFID and near-field communication systems
• Compact footprint suitable for high-density PCB layouts

Applications

• RFID tag and reader circuits
• NFC-enabled mobile devices
• Contactless smart card interfaces

Procurement Notes

Verify the specific suffix 'MAGE' against official QST documentation to confirm the exact stability and tolerance ratings, as variations exist within the QT325G family. Ensure the ordering part number matches the required frequency tolerance and packaging specifications. Cross-reference the datasheet for reflow soldering profiles to prevent thermal damage during assembly.

Selection Notes

Select this component when a 13.56 MHz fundamental mode crystal is required for compact RFID or NFC designs. The 100 Ohm ESR and 12pF load capacitance must match the oscillator circuit requirements. Consider the ±50ppm stability limit for temperature-dependent applications within the -20°C to +70°C range.

Part Context

This part belongs to the QT325G series of surface-mount crystals from QST, which offers various frequency options in a standardized 3.2x2.5mm package. The series is widely utilized in consumer electronics requiring precise timing for wireless communication protocols. The specific model denotes the 13.56 MHz variant with defined electrical characteristics.

Replacement Considerations

Direct substitutes include other manufacturers' 13.56 MHz crystals in 3225 packages with matching 12pF load capacitance and similar ESR values. Verify that alternative parts meet the same ±30ppm tolerance and -20°C to +70°C operating range before integration.