QT325S-37.400MAAE-T

Overview

The QT325S-37.400MAAE-T is a passive crystal oscillator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 37.4 MHz with a standard load capacitance of 12 pF. The component exhibits an initial frequency tolerance and stability of ±30 ppm within the operating temperature range of -20°C to +70°C. Its equivalent series resistance (ESR) is specified at 50 Ω. The physical package dimensions are 3.2 x 2.5 mm, providing a compact form factor suitable for space-constrained electronic designs requiring precise timing signals.

Feature Summary

• Surface-mount passive crystal construction
• Compact 3.2x2.5 mm footprint
• Standard 12pF load capacitance configuration

Applications

• General-purpose digital circuit timing
• Microcontroller clock sources
• Communication interface synchronization

Procurement Notes

Verify the specific suffix 'AAE' against official QST documentation to confirm the exact temperature range and tolerance specifications. Ensure the ordering part number matches the required 37.4 MHz frequency and 12pF load capacitance. Cross-reference the ESR value of 50Ω with the target circuit design requirements before procurement.

Selection Notes

Select this component when a 37.4 MHz signal is required in a small SMD package. The ±30 ppm stability is suitable for general applications but may not suffice for high-precision timing needs. Confirm that the -20°C to +70°C operating range aligns with the environmental conditions of the end product.

Part Context

This model belongs to the QT325S series from QST, which features standardized 3.2x2.5 mm packages. Variants within this series differ primarily in frequency, load capacitance, and temperature/tolerance codes indicated by the suffix letters. This specific unit represents a mid-range stability option within the broader family.

Replacement Considerations

Direct substitutes must match the 37.4 MHz frequency, 12pF load capacitance, and 3.2x2.5mm footprint. Verify compatibility of ESR and operating temperature ranges with the original design specifications.