QT532S-12.288MEEQ-T

Overview

The QT532S-12.288MEEQ-T is a surface-mount crystal oscillator manufactured by QST, designed for precision timing applications. It operates at a nominal frequency of 12.288 MHz with a high stability of ±10 ppm at 25°C and ±10 ppm over the temperature range of -20°C to +70°C. The component features a load capacitance of 10 pF and an equivalent series resistance (ESR) of 40 Ohms. It utilizes a 4-SMD, no-lead package with dimensions of 5.0mm x 3.2mm and a maximum height of 1.35mm. The device supports fundamental mode operation and is RoHS3 compliant.

Feature Summary

• High frequency stability of ±10 ppm across specified operating temperatures
• Compact 4-SMD no-lead surface mount package design
• Fundamental mode operation for precise timing control

Applications

• Digital signal processing circuits requiring precise clock synchronization
• Communication systems utilizing standard baud rates derived from 12.288 MHz
• Microcontroller-based embedded systems needing stable reference clocks

Procurement Notes

Verify that the specific suffix MEEQ-T corresponds to the required temperature range and packaging configuration for your application. Confirm compatibility with the target circuit's load capacitance requirements, as this component specifies 10 pF. Ensure that the 4-SMD no-lead footprint matches the PCB layout guidelines provided in the official datasheet to guarantee proper soldering and mechanical reliability during assembly processes.

Selection Notes

Select this component when a 12.288 MHz frequency is specifically required for digital audio or communication interfaces. The ±10 ppm stability makes it suitable for applications demanding tighter tolerance than standard ±30 ppm crystals. Consider the 4-SMD package size if space constraints allow for slightly larger components compared to the 2-SMD variants within the same product family. Evaluate the ESR of 40 Ohms against the oscillator circuit's drive level limitations.

Part Context

This part belongs to the QT532S series of surface-mount crystals from QST. Unlike the QT532G series which typically offers ±30 ppm stability, the QT532S series provides higher precision at ±10 ppm. The 12.288 MHz frequency is a common choice for generating standard serial communication baud rates and audio sampling frequencies due to its divisibility properties. The 4-SMD package distinguishes it from other series members that may use different lead configurations.

Replacement Considerations

Direct substitutes must match the 12.288 MHz frequency, ±10 ppm stability, 10 pF load capacitance, and 4-SMD no-lead package. Verify that alternative manufacturers offer components with identical dimensional tolerances and electrical characteristics to ensure seamless integration without redesigning the host circuit board.