QT325G-25.000MAHV-T

Overview

The QT325G-25.000MAHV-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 25 MHz with a load capacitance of 8 pF and a frequency stability of ±30 ppm across the operating temperature range. The component features a 4-SMD, no-lead package configuration with dimensions of 3.2 mm x 2.5 mm. It exhibits an equivalent series resistance (ESR) of 60 Ohms and is suitable for high-reliability electronic circuits requiring precise timing signals.

Feature Summary

• Surface-mount design with a compact 3.2 mm x 2.5 mm footprint
• High frequency stability of ±30 ppm for accurate timing
• Low equivalent series resistance of 60 Ohms
• Optimized for 8 pF load capacitance environments

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics oscillators
• Industrial control system clocks

Procurement Notes

Verify the specific suffix HV against official QST documentation to confirm the exact load capacitance and stability specifications. Ensure the 4-SMD no-lead package matches the target PCB land pattern. Cross-reference the 60 Ohm ESR requirement with circuit design parameters to guarantee oscillator startup reliability. Confirm RoHS compliance status through the manufacturer's latest certification documents before finalizing procurement.

Selection Notes

Select this component when a 25 MHz reference signal with ±30 ppm stability is required in a constrained space. The 8 pF load capacitance specification must align with the host oscillator circuit's design. Consider the 60 Ohm ESR value to ensure compatibility with the driving gate impedance. The SMD form factor facilitates automated assembly processes for high-volume production runs.

Part Context

This part belongs to the QT325G series of quartz crystals, which are engineered for general-purpose timing applications. The series offers various frequency options and stability grades within a standardized 3250 package size. It serves as a critical passive component for generating stable clock signals in digital logic circuits and embedded systems.

Replacement Considerations

Direct substitutes include other 25 MHz crystals with identical 3.2x2.5mm dimensions, 8pF load capacitance, and ±30ppm stability. Verify that alternative parts maintain the same 60 Ohm ESR limit. Check for compatible AEC-Q200 qualification if automotive standards apply. Ensure the replacement maintains the 4-SMD no-lead termination style.