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Product Detailed Parameters
- Description：3.2X2.5 30PPM @25C 30PPM (-40 TO
- Series：QT325S
- Mfr：QST
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：MHz Crystal
- Frequency：13.56 MHz
- Frequency Stability：±30ppm
- Frequency Tolerance：±30ppm
- Load Capacitance：18pF
- ESR (Equivalent Series Resistance)：80 Ohms
- Operating Mode：Fundamental
- Operating Temperature：-40°C ~ 85°C
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：4-SMD, No Lead
- Size / Dimension：0.126" L x 0.098" W (3.20mm x 2.50mm)
- Height - Seated (Max)：0.031" (0.80mm)
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Overview
The QT325S-13.560MAHJ-T is a MHz crystal oscillator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 13.56 MHz with a frequency stability and tolerance of ±30 ppm. The component features a load capacitance of 18 pF and an equivalent series resistance of 80 Ohms. It utilizes a glass-sealed package in a 4-SMD, No Lead form factor, measuring 3.2mm x 2.5mm with a height of 0.7mm. The device supports an operating temperature range from -40°C to +85°C and complies with RoHS standards.
Feature Summary
- Glass-sealed construction for environmental protection
- Surface-mount design compatible with automated assembly
- Stable frequency performance within specified temperature ranges
Applications
- RFID reader circuits
- Wireless communication modules
- Industrial control systems requiring precise timing
Procurement Notes
Verify the specific suffix 'HJ' against official QST documentation to confirm the exact load capacitance and tolerance specifications. Ensure the ordering information matches the required frequency stability and package dimensions for your PCB layout. Cross-reference the datasheet version to confirm compliance status and recommended soldering profiles.
Selection Notes
Select this component when a 13.56 MHz reference is required for RFID or NFC applications. Consider the 18 pF load capacitance requirement for circuit matching. Evaluate the ±30 ppm stability against system timing requirements. Confirm the 4-SMD no-lead package fits the available footprint and thermal management constraints.
Part Context
This part belongs to the QT325S series of MHz crystals from QST. The series offers various frequencies and package options for surface-mount technology. The QT325S designation indicates a specific size and form factor suitable for compact electronic designs requiring reliable oscillation.
Replacement Considerations
Direct substitutes include other manufacturers offering 13.56 MHz crystals with identical 3.2x2.5mm SMD packages, 18 pF load capacitance, and ±30 ppm stability. Verify pin compatibility and electrical parameters before substitution.
