QT325G-8.000MAHV-T

Overview

The QT325G-8.000MAHV-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precision timing applications. It operates at a fundamental frequency of 8 MHz with a load capacitance of 8 pF. The component exhibits a frequency tolerance and stability of ±30 ppm across the operating temperature range of -40°C to +85°C. It features an equivalent series resistance (ESR) of 60 ohms maximum. The device utilizes a 4-SMD, no-lead package with dimensions of 3.2 x 2.5 x 0.8 mm, ensuring compatibility with automated assembly processes.

Feature Summary

• Compact 4-SMD no-lead package design suitable for space-constrained PCB layouts
• High frequency stability of ±30 ppm ensures reliable clock signal generation
• Operates within industrial temperature range from -40°C to +85°C
• Low equivalent series resistance supports efficient oscillator circuit performance

Applications

• Microcontroller unit clock sources
• Communication interface timing circuits
• Digital signal processing systems
• Consumer electronics timing references

Procurement Notes

Verify the complete part number including suffixes against official QST documentation to ensure correct frequency, tolerance, and packaging specifications. Confirm RoHS compliance status and lead-free requirements with the supplier prior to ordering. Cross-reference the manufacturer's latest datasheet for any updates on recommended soldering profiles or storage conditions to maintain component integrity during procurement and handling.

Selection Notes

Select this component when an 8 MHz reference with ±30 ppm stability is required in a compact SMD form factor. Ensure the application oscillator circuit is designed for an 8 pF load capacitance to achieve specified accuracy. Verify that the operating environment remains within the -40°C to +85°C range. Consider the 60 ohm ESR limit when designing drive level constraints to prevent frequency pulling or aging issues.

Part Context

This model belongs to the QT325G series of surface-mount crystals from QST, characterized by small footprint and industrial-grade reliability. The series offers various frequencies and tolerances, with the MAHV-T suffix indicating specific electrical parameters and tape-and-reel packaging. It serves as a direct replacement for other 3.2x2.5mm 8MHz crystals meeting similar electrical specifications in embedded timing designs.

Replacement Considerations

Direct substitutes must match the 8 MHz frequency, 8 pF load capacitance, ±30 ppm tolerance, and 4-SMD no-lead package dimensions. Verify equivalent ESR and temperature stability before substitution. Consult QST's official cross-reference guides for validated alternative part numbers within the same product family.