QT49S-11.0592MAAJ-T

Overview

The QST QT49S-11.0592MAAJ-T is a surface-mount quartz crystal resonator operating at a fundamental frequency of 11.0592 MHz. It features an equivalent series resistance (ESR) of 40 Ohms and a load capacitance of 18 pF. The component exhibits a frequency tolerance and stability of ±30 ppm at 25°C, with a temperature range of -20°C to +70°C. The physical package dimensions are 12.7 mm in length, 4.8 mm in width, and 3.8 mm in height.

Feature Summary

• Surface-mount design for automated assembly integration
• Fundamental mode operation for precise frequency generation
• RoHS compliant construction for environmental safety

Applications

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

Procurement Notes

Verify the specific suffix 'AAJT' against official QST documentation to confirm the exact temperature range and tolerance specifications. Ensure compatibility with reflow soldering profiles defined in the manufacturer's datasheet. Cross-reference the ESR value of 40 Ohms with circuit requirements to guarantee stable oscillation conditions during implementation.

Selection Notes

Select this component when a standard 11.0592 MHz frequency is required for baud rate generation or digital logic timing. The ±30 ppm tolerance suits applications where moderate frequency accuracy is sufficient. Consider the 18 pF load capacitance requirement to ensure proper oscillator circuit tuning and minimize frequency deviation under varying load conditions.

Part Context

This part belongs to the QT49S series of surface-mount crystals from QST. It utilizes a lead-frame based SMD package structure similar to traditional HC-49/US components but adapted for surface mounting. The series provides various frequency options within a standardized footprint to simplify PCB layout and inventory management for mass production environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Verify pinout compatibility and electrical parameters before considering alternative manufacturers.