QT49-10.000MEEJ-B

Overview

The QT49-10.000MEEJ-B is a through-hole MHz crystal oscillator manufactured by QST, designed for precise timing applications in electronic circuits. Operating at a nominal frequency of 10 MHz, this component utilizes the HC-49/US package format, measuring 11.5x5x3.68mm. It features a load capacitance of 18 pF and an equivalent series resistance of 40 Ohms. The device offers a frequency stability and tolerance of ±10 ppm at 25°C, ensuring reliable performance across industrial temperature ranges suitable for embedded systems.

Feature Summary

• Provides stable oscillation with ±10 ppm frequency tolerance at standard temperature conditions
• Utilizes HC-49/US through-hole package for robust mechanical mounting
• Designed for compatibility with standard circuit loads via 18 pF capacitance specification

Applications

• Embedded system clock generation
• Consumer-grade electronic timing circuits
• Industrial control system synchronization

Procurement Notes

Verify part authenticity by checking manufacturer markings against official QST documentation. Confirm package dimensions and lead configuration match HC-49/US specifications. Ensure environmental ratings align with intended operational temperature ranges. Cross-reference datasheet parameters to validate electrical characteristics before integration into final designs.

Selection Notes

Select this component when precise 10 MHz timing is required with moderate stability needs. Consider the HC-49/US form factor for through-hole assembly processes. Evaluate load capacitance requirements against circuit design to ensure proper frequency accuracy. Assess temperature stability constraints to confirm suitability for specific operating environments.

Part Context

This crystal belongs to the QT49 series from QST, which includes various frequency options within the same physical package family. The series supports diverse timing requirements while maintaining consistent mechanical dimensions. Designers often choose this model for its balance of performance and standard packaging compatibility.

Replacement Considerations

Compatible substitutes include other HC-49/US crystals with identical 10 MHz frequency and ±10 ppm stability. Verify load capacitance and ESR values match original specifications to maintain circuit performance.