QT325G-10.000MAHE-T

Overview

The QT325G-10.000MAHE-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 10 MHz with a frequency stability of ±30 ppm within the -20°C to +70°C temperature range. The component features a load capacitance of 12 pF and an equivalent series resistance (ESR) of 200 Ohms. It utilizes a glass seal construction housed in a compact 4-SMD, no lead package with dimensions of 3.2mm x 2.5mm.

Feature Summary

• Glass seal construction for enhanced environmental stability
• Surface-mount design compatible with automated assembly processes
• Compact footprint suitable for space-constrained circuit boards

Applications

• Microcontroller clock sources
• Communication module timing references
• Digital signal processing circuits

Procurement Notes

Confirm exact specifications against the official QST datasheet before procurement. Verify that the specific suffix HE-T aligns with the required load capacitance and stability parameters for your application. Ensure compatibility with standard reflow soldering profiles for SMD components. Cross-reference part numbers to avoid confusion with similar variants like MAHV or MAHJ which differ in electrical characteristics.

Selection Notes

Select this component when a 10 MHz reference with ±30 ppm stability over commercial temperatures is required. The 12 pF load capacitance must match the oscillator circuit design. Consider the 200 Ohm ESR limit for driver strength requirements. This model is suitable for general-purpose digital logic timing where high precision is not critical compared to TCXO alternatives.

Part Context

This part belongs to the QT325G series of quartz crystals from QST. The series offers various frequency options and stability grades defined by suffix codes such as A, D, E, T, and G. The 10.000 variant provides a standard clock frequency widely used in digital systems. The glass seal technology distinguishes it from metal can packages, offering a balance of performance and cost.

Replacement Considerations

Direct substitutes include other 10 MHz crystals with identical 12 pF load capacitance and ±30 ppm stability. Check mechanical compatibility with the 3.2x2.5mm footprint. Variants like QT325G-10.000MAHV-T differ in load capacitance (8 pF) and ESR (150 Ohms), requiring circuit adjustment if used as a drop-in replacement.