QT325G-25.000MAAQ-T

Overview

The QT325G-25.000MAAQ-T is a MHz quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 25.000 MHz with a load capacitance of 10 pF and an equivalent series resistance (ESR) of 60 Ohms. The component features a 4-SMD, no lead package with dimensions of 3.2mm x 2.5mm. Frequency stability is rated at ±30 ppm at 25°C and ±30 ppm over the operating temperature range of -20°C to +70°C.

Feature Summary

• Utilizes glass seal technology for enhanced environmental durability
• Supports surface-mount assembly via a compact 4-terminal no-lead design
• Maintains stable oscillation within specified industrial temperature limits

Applications

• General-purpose clock signal generation in embedded systems
• Timing references for microcontroller units
• Communication interface circuits requiring precise frequency standards

Procurement Notes

Verify the specific suffix 'AAQ' against official QST documentation to confirm the exact temperature stability and load capacitance parameters. Ensure the selected variant matches the required thermal performance for the target application environment. Cross-reference the manufacturer part number with authorized distributors to confirm current availability status and authenticity.

Selection Notes

Select this component when a 25 MHz fundamental frequency is required with ±30 ppm stability across the -20°C to +70°C range. The 10 pF load capacitance specification must align with the host oscillator circuit design. Consider the 60 Ohm ESR value for proper drive level management and circuit impedance matching during the schematic phase.

Part Context

This part belongs to the QT325G series of surface-mount crystals from QST. The series offers various frequency options and stability grades. The 3.2x2.5mm form factor provides a balance between size reduction and electrical performance compared to larger packages, suitable for space-constrained consumer and industrial electronics.

Replacement Considerations

Direct substitutes include variants with identical electrical specifications but different suffixes indicating alternate stability or temperature ranges, such as QT325G-25.000MDDJ-T. Verify that any replacement maintains the 10 pF load capacitance and 60 Ohm ESR to ensure circuit compatibility.