QT325S-27.000MAKV-T

Overview

The QT325S-27.000MAKV-T is a surface-mount crystal oscillator manufactured by QST, designed for precision timing applications. It operates at a nominal frequency of 27 MHz with a load capacitance of 8 pF and an equivalent series resistance of 50 Ohms. The component features a compact 4-SMD, No Lead package measuring 3.2 x 2.5 mm with a maximum height of 0.80 mm. Frequency stability is rated at ±30 ppm at 25°C and ±60 ppm across the operating temperature range of -40°C to +85°C. The device utilizes glass seal technology and supports a maximum operating temperature of 125°C.

Feature Summary

• Compact 3.2x2.5mm SMD footprint suitable for space-constrained designs
• Glass seal construction for enhanced environmental reliability
• High frequency stability with ±30ppm tolerance at room temperature

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics internal clocks

Procurement Notes

Verify the manufacturer designation carefully, as this specific part number appears in listings associated with both QST and TXC Corporation. Confirm that the requested unit matches the QST specification sheet regarding the 3.2x2.5mm package dimensions and 8pF load capacitance. Ensure the supplier provides documentation confirming the ±30ppm stability rating at 25°C to avoid substitution errors with similar models having different tolerances or package sizes.

Selection Notes

Select this component when a small form factor is required alongside precise 27 MHz timing. The 8pF load capacitance must match the oscillator circuit design requirements. Consider the ±30ppm stability limit for applications sensitive to frequency drift. The 50 Ohm ESR value should be compatible with the driving circuit's power constraints. Verify thermal performance within the specified -40°C to +85°C operational window.

Part Context

This part belongs to the QT325S series of surface-mount crystals from QST. The series is characterized by its small 3.2x2.5mm package and glass-sealed construction. Variants within the series differ primarily in frequency, stability ratings, and load capacitance values while maintaining consistent physical dimensions and mounting styles for standardized PCB layouts.

Replacement Considerations

QT325S-27.000MAHV-T

FAQ

What is the physical package size of the QT325S-27.000MAKV-T?

The component uses a 4-SMD, No Lead package with dimensions of 3.2 x 2.5 mm and a maximum height of 0.80 mm.

Does this crystal support operation below freezing temperatures?

Yes, the specified operating temperature range extends down to -40°C.