QT49S-11.0592MEEJ-T

Overview

The QT49S-11.0592MEEJ-T is a surface-mount quartz crystal resonator manufactured by QST Products, LLC. It operates at a fundamental frequency of 11.0592 MHz with a load capacitance of 18 pF. The component features a frequency tolerance and stability of ±10 ppm at 25°C, and an equivalent series resistance (ESR) of 40 Ohms maximum. Designed for SMD HC-49US packages, it supports operation modes suitable for embedded communication applications.

Feature Summary

• Surface-mount design in standard HC-49US package for direct PCB integration
• High frequency stability with ±10 ppm tolerance at room temperature
• Optimized low ESR characteristics ensuring reliable oscillation
• RoHS compliant construction for environmental safety standards

Applications

• Embedded communication systems requiring precise clock timing
• Microcontroller unit (MCU) clock sources
• Serial interface modules such as UART or RS-232 transceivers
• Consumer electronic devices utilizing standard baud rates

Procurement Notes

Verify the specific suffix 'MEEJ' against official QST documentation to confirm the ±10 ppm tolerance variant, as other suffixes like 'MAAJ' may indicate different tolerances. Ensure the ordering part number matches the required frequency stability and package dimensions. Cross-reference the datasheet for storage temperature ranges and soldering profiles to maintain component integrity during assembly processes.

Selection Notes

Select this component when a stable 11.0592 MHz reference is required for serial communication protocols. The ±10 ppm tolerance offers higher precision than standard ±30 ppm parts, making it suitable for applications sensitive to clock drift. Consider the 40 Ohm ESR limit for oscillator circuit design to ensure adequate start-up margins. Verify that the SMD footprint aligns with existing board layouts to avoid redesign efforts.

Part Context

This part belongs to the QT49S series of surface-mount crystals from QST Products, LLC. The series provides various frequency options within the HC-49US form factor. The MEEJ suffix specifically denotes the electrical characteristics including the 10 ppm tolerance and 18 pF load capacitance. This series is positioned for cost-effective yet reliable timing solutions in mass-produced electronics.

Replacement Considerations

Compatible substitutes include the QT49S-11.0592MAAJ-T if ±30 ppm tolerance is acceptable. Other generic HC-49US SMD crystals with matching 11.0592 MHz frequency, 18 pF load capacitance, and similar ESR limits can serve as functional replacements provided pin compatibility and thermal specifications are verified.