QT325G-20.000MAHV-T

Overview

The QT325G-20.000MAHV-T is a surface-mount crystal oscillator manufactured by QST, designed for precision timing applications. It operates at a nominal frequency of 20 MHz with a load capacitance of 8 pF and an equivalent series resistance (ESR) of 60 Ohms. The device features a frequency stability of ±30 ppm across a commercial temperature range of -40°C to +85°C. Packaged in a compact 3.2 x 2.5 mm four-terminal no-lead SMD footprint, it offers high reliability and low profile suitable for space-constrained electronic designs.

Feature Summary

• Compact 3.2x2.5mm four-terminal no-lead surface mount package
• High frequency stability of ±30 ppm over extended temperature range
• Low equivalent series resistance for efficient circuit integration
• Designed for reliable operation in commercial industrial environments

Applications

• Microcontroller clock sources
• Communication module timing references
• Portable electronic devices requiring precise timekeeping
• Industrial control system oscillators

Procurement Notes

Verify the specific suffix HV against official QST documentation to confirm the exact temperature range and tolerance specifications. Ensure the ordering part number matches the required load capacitance and ESR values for your circuit design. Cross-reference with authorized distributors to confirm genuine factory-sealed components and recent date codes to maintain quality standards.

Selection Notes

Select this component when a 20 MHz reference with ±30 ppm stability is required within a -40°C to +85°C operating window. The 8 pF load capacitance must match the microcontroller or oscillator circuit requirements. Consider the 60 Ohm ESR for impedance matching. This model is suitable where space constraints necessitate a small SMD footprint without sacrificing frequency accuracy.

Part Context

This part belongs to the QST QT325G series of surface-mount crystals. The series offers various frequency options and stability grades, distinguished by suffix codes indicating temperature ranges and tolerance levels. The QT325G format provides a standardized footprint for easy PCB layout integration compared to older through-hole or larger SMD packages.

Replacement Considerations

Direct substitutes include other QT325G variants from QST with identical 20 MHz frequency but different stability ratings, such as those with ±10 ppm or ±20 ppm tolerances if higher precision is needed. Ensure any replacement maintains the 8 pF load capacitance and 3.2x2.5mm package dimensions for mechanical compatibility.