QT49-6.000MAAJ-B

Overview

The QT49-6.000MAAJ-B is a fundamental-mode quartz crystal resonator manufactured by QST, designed for through-hole mounting in the HC-49/US package. It operates at a nominal frequency of 6 MHz with a load capacitance of 18 pF and a maximum series resistance of 80 Ohms. The component provides a frequency stability of ±30 ppm across an operating temperature range of -20°C to +70°C. This specification aligns with standard fundamental-mode requirements for general-purpose timing applications.

Feature Summary

• Fundamental-mode operation within the HC-49/US through-hole package
• Standard 18 pF load capacitance configuration
• Frequency stability maintained at ±30 ppm over specified thermal range

Applications

• General-purpose clock signal generation
• Microcontroller oscillator circuits
• Communication interface timing

Procurement Notes

Verify the specific suffix 'B' against the manufacturer's current datasheet to confirm exact tolerance and temperature specifications. Ensure the HC-49/US footprint matches the target PCB design. Confirm RoHS compliance status if required by project regulations. Cross-reference the 80 Ohm maximum series resistance with circuit drive level requirements.

Selection Notes

Select this component when a 6 MHz fundamental frequency is required with moderate stability. The HC-49/US package suits automated or manual through-hole assembly. Verify that the 18 pF load capacitance matches the oscillator circuit design. Consider the -20°C to +70°C range against environmental conditions.

Part Context

This part belongs to the QT49 series of quartz crystals from QST. The series utilizes the common HC-49/US housing. Variants differ primarily by frequency and tolerance. The model indicates a 6 MHz nominal frequency with specific stability ratings.

Replacement Considerations

Substitutes must match the 6 MHz frequency, 18 pF load capacitance, and HC-49/US package. Verify equivalent stability and resistance parameters. Check pin compatibility and mounting orientation.