QT252S-37.400MEEQ-T

Overview

The QT252S-37.400MEEQ-T is a quartz crystal resonator manufactured by QST Products, LLC. It operates at a fundamental frequency of 37.4 MHz and utilizes a 4-SMD, No Lead package with dimensions of 2.50mm x 2.00mm. The component features a load capacitance of 10pF and an equivalent series resistance (ESR) of 60 Ohms. Frequency stability is rated at ±10ppm at 25°C and ±10ppm across the -20°C to +70°C operating temperature range.

Feature Summary

• Seam seal construction for environmental protection
• Compact surface-mount form factor suitable for space-constrained designs
• High frequency stability within specified industrial temperature ranges

Applications

• Microcontroller clock sources
• Communication module timing references
• Digital signal processing circuits

Procurement Notes

Verify the specific manufacturer datasheet for the QT252S-37.400MEEQ-T to confirm RoHS compliance and lead-free status. Ensure that the 60 Ohm ESR and 10pF load capacitance align with the oscillator circuit design requirements before procurement. Cross-reference the 4-SMD no-lead package dimensions with PCB footprint specifications to guarantee mechanical compatibility.

Selection Notes

Select this component when a 37.4 MHz reference is required with ±10ppm stability in a compact SMD package. The 60 Ohm ESR must be compatible with the driving circuit's oscillation conditions. Consider the -20°C to +70°C temperature range against the application's environmental exposure to ensure long-term frequency accuracy without drift.

Part Context

This part belongs to the QT252S series of seam-seal crystals from QST. The series offers various frequencies with consistent 2.5mm x 2.0mm packaging. The QT252S-37.400MEEQ-T specifically targets applications needing precise timing at 37.4 MHz with robust thermal performance.

Replacement Considerations

Compatible substitutes include other 37.4 MHz crystals with identical 10pF load capacitance and ≤60 Ohm ESR in a 4-SMD no-lead package. Verify pinout and mechanical dimensions match the existing PCB layout to ensure direct replacement without redesign.

FAQ

What is the equivalent series resistance (ESR) of this crystal?

The ESR is 60 Ohms.

Does this component support operation below 0°C?

Yes, the frequency stability is maintained at ±10ppm down to -20°C.