QT325G-18.432MAHV-T

Overview

The QST QT325G-18.432MAHV-T is a surface-mount quartz crystal resonator designed for precision timing applications. It operates at a fundamental frequency of 18.432 MHz with a frequency tolerance of ±30 ppm across the industrial temperature range of -20°C to +70°C. The component features an 8 pF load capacitance and a maximum equivalent series resistance (ESR) of 60 Ohms. It is housed in a compact 4-SMD, no-lead package with dimensions of 3.2 x 2.5 x 0.8 mm, suitable for automated assembly processes.

Feature Summary

• Compact 4-SMD no-lead package design for space-constrained PCB layouts
• Stable frequency performance within specified industrial temperature limits
• Low equivalent series resistance for efficient circuit integration

Applications

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

Procurement Notes

Verify the specific suffix HV against the manufacturer's current datasheet to confirm the exact load capacitance and tolerance specifications. Ensure the operating temperature range aligns with your system requirements. Cross-reference the package dimensions with your PCB footprint library to guarantee mechanical compatibility during assembly.

Selection Notes

Select this component when a 18.432 MHz reference is required in a small form factor. Consider the ±30 ppm tolerance relative to your system's jitter budget. Evaluate the 8 pF load capacitance against your oscillator circuit design to ensure proper frequency stability and startup characteristics.

Part Context

This part belongs to the QT325G series of surface-mount crystals from QST. The series offers various frequency options and tolerance grades, identified by suffixes such as A, D, E, T, G, H. The HV suffix specifically denotes the 18.432 MHz variant with 8 pF load capacitance and ±30 ppm tolerance.

Replacement Considerations

Direct substitutes must match the 18.432 MHz frequency, 8 pF load capacitance, and 4-SMD package dimensions. Verify that alternative manufacturers offer comparable ESR values and temperature stability within the -20°C to +70°C range.