QT325G-25.000MAAJ-T

Overview

The QT325G-25.000MAAJ-T is a surface-mount glass-sealed quartz crystal manufactured by QST, operating at a fundamental frequency of 25 MHz. It features a compact 3.2 mm x 2.5 mm package with a height of 0.8 mm. The component provides a frequency tolerance and stability of ±30 ppm across the commercial temperature range of -20°C to +70°C. It utilizes an 18 pF load capacitance and exhibits a series resistance (ESR) of 60 Ohms. Designed for SMD/SMT assembly, it ensures reliable signal generation in space-constrained electronic applications.

Feature Summary

• Glass-sealed construction for enhanced environmental protection
• Compact 4-SMD no-lead footprint suitable for high-density PCBs
• Fundamental mode oscillation for precise timing control

Applications

• Microcontroller clock sources
• Communication module timing circuits
• Consumer electronics internal clocks

Procurement Notes

Verify the manufacturer designation on the component marking or datasheet, as the model prefix 'QT' may indicate QST-specific variants distinct from TXC's similar numbering. Confirm the exact ESR and load capacitance values against the specific supplier's data sheet, as distributor listings sometimes conflate specifications between different manufacturers offering identical form factors. Ensure the package dimensions match the target PCB land pattern.

Selection Notes

Select this component when a 25 MHz reference is required in a 3225-sized package with moderate stability requirements. The 60 Ohm ESR must be compatible with the oscillator circuit's drive level constraints. Verify that the ±30 ppm stability meets the system's timing accuracy needs over the intended operating temperature range. Consider the glass-seal technology if moisture resistance is a priority compared to ceramic alternatives.

Part Context

This part belongs to the QT325G series of surface-mount crystals. It shares the standard 3.2x2.5mm footprint with other industry-standard components but may differ in electrical parameters like ESR and aging rates depending on the specific manufacturer. The 'T' suffix typically denotes tape and reel packaging for automated assembly.

Replacement Considerations

Direct substitutes include the QT325G-25.000MAHJ-T (QST) and QT325G-25.000MDDJ-T (QST), though these may have different stability ratings such as ±20ppm. Generic equivalents from other manufacturers require verification of the 60 Ohm ESR and 18pF load capacitance to ensure circuit compatibility.