QT252S-38.000MAAV-T

Overview

The QT252S-38.000MAAV-T is a surface-mount quartz crystal manufactured by QST. It operates at a fundamental frequency of 38 MHz with a load capacitance of 8 pF and an equivalent series resistance of 60 Ohms. The component features a 4-SMD, no-lead package with dimensions of 2.5 x 2.0 x 0.55 mm. Frequency stability is rated at ±30 ppm at 25°C and ±30 ppm over the operating temperature range of -20°C to 70°C.

Feature Summary

• Seam-seal construction for environmental protection
• Surface-mount design for automated assembly
• Stable frequency output within specified thermal limits

Applications

• Microcontroller clock sources
• Communication module timing references
• Consumer electronics signal processing

Procurement Notes

Verify the manufacturer designation on the official datasheet, as the QT252S series is produced by multiple vendors including TXC Corporation. Confirm that the specific suffix 'MAAV-T' aligns with the required 8 pF load capacitance and -20°C to 70°C temperature range. Ensure the package footprint matches the 2.5x2.0mm SMD specification before integration into the PCB layout.

Selection Notes

Select this component when a compact 38 MHz reference is required for space-constrained designs. The 8 pF load capacitance must match the oscillator circuit requirements to ensure accurate frequency generation. Consider the -20°C to 70°C operating range against the environmental conditions of the final application to guarantee long-term stability.

Part Context

This part belongs to the QT252S family of seam-seal quartz crystals. These components are designed for high-volume surface-mount applications where small form factors are critical. The series offers various frequency options and stability grades, with this specific model providing a standard 38 MHz output suitable for general-purpose digital timing.

Replacement Considerations

Direct substitutes include other manufacturers' 38 MHz crystals in the same 2.5x2.0mm SMD package with identical 8 pF load capacitance and ±30 ppm stability. Verify pin compatibility and mechanical height constraints when swapping suppliers.