QT325S-11.0592MAHJ-T

Overview

The QT325S-11.0592MAHJ-T is a quartz crystal resonator manufactured by QST, designed for surface-mount applications. It operates at a fundamental frequency of 11.0592 MHz with a frequency stability and tolerance of ±30 ppm. The component features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 150 Ohms. It utilizes a 4-SMD, no-lead package with dimensions of 3.2 mm x 2.5 mm x 0.7 mm. The device supports a wide operating temperature range from -40°C to +85°C and complies with RoHS3 standards.

Feature Summary

• Fundamental mode operation for precise timing control
• Glass-sealed construction for environmental protection
• Compact 4-pin SMD footprint for automated assembly

Applications

• Microcontroller clock sources
• Communication interface timing
• Embedded system oscillators

Procurement Notes

Verify the specific suffix 'H' confirms the ±30 ppm stability rating across the full -40°C to +85°C temperature range. Ensure the 150 Ohm ESR specification matches the oscillator circuit requirements. Confirm the 4-SMD no-lead package dimensions align with the PCB footprint design. Check for RoHS3 compliance documentation if required by project specifications.

Selection Notes

Select this component when a 11.0592 MHz fundamental frequency is required for baud rate generation or system clocks. The ±30 ppm stability is suitable for standard UART and SPI interfaces. Consider the 150 Ohm ESR value to ensure proper oscillation startup in the target circuit. The 18 pF load capacitance must match the external capacitors used in the design.

Part Context

This part belongs to the QT325S series of glass-sealed quartz crystals from QST. The series offers various frequencies and stability grades, with the 'H' suffix denoting the specific temperature-stability combination. It competes with similar SMD crystals from manufacturers like TXC, offering a standardized form factor for consumer and industrial electronics.

Replacement Considerations

Direct substitutes include parts with identical 11.0592 MHz frequency, 18 pF load capacitance, and 4-SMD 3.2x2.5mm package. Verify that replacement components support the same 150 Ohm ESR and ±30 ppm stability over the -40°C to +85°C range to maintain circuit performance.