QT325G-27.000MAAV-T

Overview

The QT325G-27.000MAAV-T is a 27 MHz fundamental mode quartz crystal oscillator manufactured by QST Products, LLC. It features a 4-pin ceramic SMD package with dimensions of 3.2mm x 2.5mm x 0.8mm. The component operates with a load capacitance of 8pF and exhibits an equivalent series resistance (ESR) of 60 Ohms. Frequency tolerance and stability are both specified at ±30ppm across the operating temperature range.

Feature Summary

• Fundamental mode quartz crystal operation for precise frequency generation
• Compact 4-pin surface mount design suitable for space-constrained PCB layouts
• Ceramic package construction providing mechanical durability

Applications

• Clock signal generation in digital logic circuits
• Frequency reference sources for microcontroller systems
• Timing components in communication modules requiring 27 MHz oscillation

Procurement Notes

Verify the specific suffix 'AAV' against official QST documentation to confirm package type and tolerance specifications. Ensure compatibility with reflow soldering profiles defined in the manufacturer datasheet. Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm that the 8pF load capacitance matches the target circuit design requirements before procurement.

Selection Notes

Select this component when a 27 MHz fundamental frequency is required with ±30ppm stability. The 60 Ohm ESR value influences startup time and power consumption; ensure the driving circuit can support this impedance level. The 8pF load capacitance must align with the host oscillator's internal or external capacitor values. Consider the 3.2x2.5mm footprint for board space optimization compared to larger through-hole alternatives.

Part Context

This part belongs to the QT325G series of surface mount crystals from QST Products, LLC. The series offers various frequencies and tolerances within a standardized 3225 package outline. The QT325G-27.000MAAV-T specifically targets applications needing a stable 27 MHz reference with moderate precision requirements typical in consumer electronics and industrial control interfaces.

Replacement Considerations

Direct substitutes include other manufacturers' 27 MHz crystals in 3225 packages with matching 8pF load capacitance and similar ESR values. Verify pinout compatibility and thermal characteristics when replacing. Parts like those from TXC or ECS may serve as functional equivalents if electrical parameters align precisely with the original design constraints.