QT325G-28.63636MAHV-T

Overview

The QT325G-28.63636MAHV-T is a surface-mount crystal oscillator manufactured by QST, designed for precision timing applications. It operates at a nominal frequency of 28.63636 MHz with a stability tolerance of ±30 ppm across the temperature range of -40°C to +85°C. The component features an 8 pF load capacitance and a maximum series resistance of 60 Ohms. It utilizes a compact 4-SMD, no-lead package with dimensions of 3.2 mm x 2.5 mm, suitable for automated assembly in space-constrained electronic designs.

Feature Summary

• Compact 4-SMD no-lead package design for efficient surface-mount assembly
• Wide operating temperature range supporting industrial environments
• High frequency stability ensuring reliable clock signal generation

Applications

• Microcontroller clock sources
• Communication interface timing circuits
• Digital signal processing systems

Procurement Notes

Verify the specific suffix HV-T against official QST documentation to confirm the exact load capacitance and temperature stability specifications. Ensure compatibility with reflow soldering profiles specified in the manufacturer datasheet. Cross-reference the part number with authorized distributors to obtain current availability and lead times. Confirm that the 8 pF load capacitance matches the target circuit requirements before finalizing procurement orders.

Selection Notes

Select this component when a precise 28.63636 MHz reference is required within a limited board area. The ±30 ppm stability is suitable for general-purpose digital logic and communication interfaces. Consider the 60 Ohm series resistance for impedance matching in the oscillator circuit. Evaluate the -40°C to +85°C range against environmental conditions to ensure long-term reliability without requiring more stringent or less expensive alternatives.

Part Context

This part belongs to the QT325G series of quartz crystals from QST, characterized by small form factors and standardized electrical parameters. The series supports various frequencies and stability grades, with the HV-T suffix denoting specific performance characteristics including load capacitance and temperature range. It serves as a fundamental passive component in modern electronics, replacing larger through-hole variants in high-density PCB layouts.

Replacement Considerations

Direct substitutes must match the 28.63636 MHz frequency, 8 pF load capacitance, and 4-SMD 3.2x2.5mm footprint. Verify equivalent stability ratings and series resistance values to maintain circuit performance. Check for pin-compatible alternatives from other manufacturers if supply constraints exist, ensuring all electrical parameters align with the original design specifications.