QT325G-19.200MAHE-T

Overview

The QT325G-19.200MAHE-T is a quartz crystal resonator manufactured by QST, operating at a fundamental frequency of 19.2 MHz. It features a load capacitance of 12 pF and an equivalent series resistance (ESR) of 60 Ohms. The component exhibits a frequency stability of ±30 ppm across the specified temperature range. Designed for surface-mount applications, it utilizes a compact 2-SMD, no-lead package with dimensions of 3.20mm x 2.50mm and a maximum height of 0.8mm. The device supports base harmonic operation mode and complies with RoHS3 standards.

Feature Summary

• Compact 3.2mm x 2.5mm surface-mount footprint suitable for space-constrained designs
• High frequency stability of ±30 ppm ensures reliable timing performance
• RoHS3 compliant construction for environmental safety requirements

Applications

• Clock signal generation in microcontroller circuits
• Timing references for communication interfaces
• Oscillator circuits in consumer electronics

Procurement Notes

Verify the specific suffix HE against official QST documentation to confirm the exact temperature range and tolerance specifications, as suffix variations can alter electrical characteristics. Ensure compatibility with existing PCB footprints and reflow soldering profiles. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm that the 12pF load capacitance matches the oscillator circuit design requirements.

Selection Notes

Select this component when a 19.2 MHz fundamental frequency is required with a 12pF load capacitance. The 60 Ohm ESR must align with the oscillator circuit's drive level limitations. Consider the -40°C to +85°C temperature range if industrial grade stability is needed. Verify that the 3.2x2.5mm package fits within the available board area constraints compared to larger alternatives like the 5.0x3.2mm form factor.

Part Context

This part belongs to the QT325G series of quartz crystals from QST, designed for general-purpose timing applications. The series offers various frequency and tolerance options within a standardized small outline package. It serves as a passive frequency control element, replacing older through-hole or larger SMD variants where space optimization is critical. The product line emphasizes reliability and consistency in mass-produced electronic assemblies.

Replacement Considerations

Publicly confirmed parameter-equivalent substitute: QT532G-19.200MAAE-T (QST). Note that the QT532G uses a 5.0x3.2mm package, requiring PCB layout adaptation. Direct pin-to-pin replacement is not possible due to dimensional differences. Verify that the substitute maintains the same 12pF load capacitance and 60 Ohm ESR values.