QT325S-24.000MEHQ-T

Overview

The QT325S-24.000MEHQ-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 24 MHz with a load capacitance of 10 pF and an equivalent series resistance of 50 Ohms. The component features a ±10 ppm frequency stability tolerance. It utilizes a glass-sealed package construction with dimensions of 3.2 x 2.5 mm and a height of 0.7 mm. The device employs a four-terminal SMD no-lead configuration to ensure reliable electrical connections in compact electronic designs.

Feature Summary

• Glass-sealed package construction for environmental protection
• Four-terminal SMD no-lead configuration for surface mounting
• Fundamental mode operation at 24 MHz
• High frequency stability with ±10 ppm tolerance

Applications

• Embedded communication systems requiring precise clock signals
• Microcontroller unit (MCU) clock sources
• Digital signal processing (DSP) timing references
• Human-machine interface (HMI) display modules

Procurement Notes

Verify the manufacturer designation carefully, as the model number may appear associated with TXC Corporation in certain distributor databases despite QST being the primary brand identifier for this specific part variant. Confirm the package type is the 3.2x2.5mm glass-sealed SMD format and that the load capacitance matches the required 10pF specification for your circuit design. Ensure the frequency tolerance of ±10ppm meets your system's timing requirements before finalizing procurement orders.

Selection Notes

Select this component when a compact surface-mount crystal with high stability is required for 24 MHz applications. The 10pF load capacitance must match the oscillator circuit design. Consider the glass-seal technology for improved reliability compared to standard epoxy packages. The 50 Ohm ESR should be compatible with the driving capability of the target microcontroller or oscillator IC.

Part Context

This component belongs to the QT325S series of MHz quartz crystals from QST. The series offers various frequency options and stability grades within a standardized 3.2x2.5mm footprint. The MEHQ suffix typically denotes specific packaging and stability characteristics within this product line, distinguishing it from other variants like MAHJ or MDIJ which may have different tolerances or load capacitances.

Replacement Considerations

Direct substitutes include the QT325S-24.000MAHJ-T, though it offers ±30ppm stability and 18pF load capacitance, which requires circuit adjustment. The QT325S-24.000MDIJ-T is another variant but may differ in stability specifications. Verify pin compatibility and electrical parameters before swapping.