QT325S-37.400MEEE-T

Overview

The QST QT325S-37.400MEEE-T is a passive quartz crystal resonator designed for surface-mount applications. It operates at a nominal frequency of 37.4 MHz with a frequency stability of ±10 ppm within the -20°C to +70°C temperature range. The component features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 50 Ohms. It utilizes a 4-SMD, No Lead package with dimensions of 3.2 x 2.5 x 0.7 mm, suitable for automated assembly processes in industrial control and communication systems.

Feature Summary

• Compact SMD footprint optimized for high-density PCB layouts
• Stable frequency output under standard industrial thermal conditions
• Low ESR design supporting efficient oscillator circuit integration

Applications

• Industrial control system clock sources
• Embedded communication module timing
• Microcontroller peripheral oscillators

Procurement Notes

Verify the specific suffix 'EEE' against the manufacturer's datasheet to confirm the exact temperature range and stability class. Ensure the load capacitance matches the host oscillator circuit requirements. Confirm package compatibility with existing pick-and-place equipment specifications before finalizing orders.

Selection Notes

Select this variant when a 37.4 MHz frequency is required with ±10 ppm stability in industrial environments. Compare against alternatives if higher precision or extended temperature ranges are necessary. Validate that the 18 pF load capacitance aligns with the target microcontroller or ASIC specifications to ensure proper oscillation startup.

Part Context

This component belongs to the QT325S series from QST, which offers various frequencies and stability grades within a standardized 3225 SMD package. The series provides options for different temperature ranges and load capacitances to support diverse electronic design needs across consumer and industrial sectors.

Replacement Considerations

Direct substitutes include other QT325S variants with identical 37.4 MHz frequency and 18 pF load capacitance but potentially different stability codes. Verify pinout and mechanical dimensions remain consistent before substitution.