QT325S-18.432MEEQ-T

Overview

The QT325S-18.432MEEQ-T is a surface-mount crystal oscillator manufactured by QST, operating at a nominal frequency of 18.432 MHz. It utilizes a fundamental mode quartz resonator housed in a compact 3.2 mm x 2.5 mm SMD package with a height of 0.7 mm. The component features a load capacitance of 10 pF and an equivalent series resistance (ESR) of 60 Ohms. Frequency tolerance and stability are specified at ±10 ppm, with an operating temperature range extending from -20°C to +70°C. The device is designed for surface mount technology applications requiring precise timing signals.

Feature Summary

• Fundamental mode quartz crystal operation providing stable oscillation
• Compact 3.2mm x 2.5mm surface-mount package design
• High frequency stability within specified industrial temperature ranges

Applications

• Embedded communication systems requiring precise clock signals
• Microcontroller-based digital circuits
• Consumer electronic devices utilizing serial communication protocols

Procurement Notes

Verify the specific suffix codes against official QST documentation to ensure exact frequency tolerance and temperature range compliance. Confirm package dimensions and pin configuration match the target PCB footprint. Cross-reference RoHS compliance status with current regulatory requirements before finalizing procurement orders.

Selection Notes

Select this component when a 18.432 MHz fundamental frequency is required for standard microcontroller or communication interfaces. Ensure the circuit design accommodates the 10 pF load capacitance and 60 Ohm ESR specifications. Verify that the -20°C to +70°C operating range meets the environmental conditions of the intended application environment.

Part Context

This part belongs to the QT325S series of surface-mount crystals from QST. The series offers various frequency options and tolerance grades within a standardized small outline package. These components are commonly used as primary clock sources in portable electronics and embedded systems where space constraints and timing accuracy are critical design factors.

Replacement Considerations

The TXC Corporation QT325S-18.432MEEQ-T is a confirmed substitute with identical electrical parameters and package dimensions. Other manufacturers offering 3.2x2.5mm 18.432MHz crystals with ±10ppm tolerance may be considered if pin compatibility and load capacitance values are verified.