QT325G-54.000MAAE-T

Overview

The QT325G-54.000MAAE-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precision timing applications in electronic circuits. It operates at a fundamental frequency of 54 MHz with a load capacitance of 12 pF and a maximum equivalent series resistance (ESR) of 60 Ohms. The component exhibits a frequency stability and resonator tolerance of ±30 ppm within an operating temperature range of -20°C to +70°C. Housed in a compact 4-SMD, no-lead package with body dimensions of 3.2 x 2.5 x 0.8 mm, it provides reliable oscillation for microcontroller systems and communication interfaces requiring stable clock signals.

Feature Summary

• Compact 4-SMD no-lead package design suitable for automated surface-mount assembly processes
• High-frequency operation at 54 MHz with precise load capacitance matching for stable oscillator circuits
• Robust frequency stability maintained across standard industrial temperature ranges

Applications

• Microcontroller unit (MCU) clock sources for embedded systems
• Communication interface timing references in data transmission modules
• General-purpose oscillator circuits requiring stable high-frequency signals

Procurement Notes

Verify the specific suffix codes against official QST documentation to confirm exact electrical parameters, particularly regarding temperature range and tolerance levels. Ensure compatibility with PCB footprint specifications and reflow soldering profiles defined in the manufacturer's datasheet. Cross-reference part numbers with authorized distributors to avoid counterfeit components and confirm current production status.

Selection Notes

Select this component when a 54 MHz clock signal is required with moderate stability requirements suitable for industrial environments. Consider the 12 pF load capacitance requirement for oscillator circuit design to ensure accurate frequency generation. Evaluate thermal constraints to ensure the -20°C to +70°C range meets application needs, and verify that the low-profile SMD package fits within spatial limitations of the target design.

Part Context

This crystal belongs to the QT325G series from QST, which offers various frequency options and tolerance grades. The series is characterized by small form factors and reliability for consumer and industrial electronics. Similar parts in the lineup include variants with different frequencies such as 16 MHz or 32 MHz, and alternative tolerance codes like ±20 ppm or ±10 ppm for higher precision needs.

Replacement Considerations

Direct substitutes may include other 54 MHz crystals with identical 12 pF load capacitance and similar ESR values. Verify pinout compatibility and physical dimensions before substitution. Alternative packages or slightly different tolerance ratings may require circuit adjustments.