QT325S-11.2896MEEQ-T

Overview

The QT325S-11.2896MEEQ-T is a fundamental mode quartz crystal resonator manufactured by QST, designed for precision timing applications in compact electronic systems. It operates at a nominal frequency of 11.2896 MHz with a load capacitance of 10 pF and an equivalent series resistance (ESR) of 50 Ohms. The component utilizes a glass-sealed construction housed in a 4-SMD, no lead package with dimensions of 3.2 mm x 2.5 mm. Frequency stability is specified at ±10 ppm over the extended temperature range of -30°C to +85°C, ensuring reliable clock signal generation for microcontrollers and communication interfaces.

Feature Summary

• Glass-sealed hermetic packaging ensures long-term frequency stability and environmental protection against moisture and contaminants.
• Compact 3.2mm x 2.5mm surface-mount footprint enables high-density PCB layout for portable and miniaturized devices.
• Fundamental oscillation mode provides low phase noise and precise timing accuracy for digital clock circuits.

Applications

• Microcontroller unit (MCU) clock sources
• Wireless communication module timing references
• Real-time clock (RTC) circuits

Procurement Notes

Verify the specific suffix 'E' indicates ±10 ppm stability within the -20°C to +70°C range or 'T' for -30°C to +85°C as per QST datasheet conventions. Confirm the load capacitance matches the target oscillator circuit design requirements. Ensure the 4-SMD no-lead package compatibility with standard SMT reflow profiles. Cross-reference the manufacturer part number directly with official QST documentation to avoid counterfeit components.

Selection Notes

Select this component when a stable 11.2896 MHz reference is required for baud rate generation or system clocking in space-constrained designs. The glass-seal technology offers superior aging characteristics compared to metal can alternatives. Evaluate the ESR of 50 Ohms against the oscillator driver strength to ensure reliable startup conditions under all operating temperatures.

Part Context

This part belongs to the QT325S series of quartz crystals from QST, which are widely used in consumer electronics and industrial control systems. The series is characterized by its small form factor and robust performance. QST specializes in timing devices, providing solutions that integrate seamlessly into modern embedded systems requiring precise frequency control.

Replacement Considerations

Compatible substitutes include TXC models such as QT325S-11.2896MEEQ-T, which share identical electrical parameters and physical dimensions. Verify pinout compatibility and thermal specifications before substitution. Other manufacturers offering 3.2x2.5mm glass-seal crystals may require schematic review for oscillator loop gain adjustments.