QT49-28.63636MAHE-B

Overview

The QT49-28.63636MAHE-B is a MHz crystal oscillator manufactured by QST, designed for precision frequency generation in electronic circuits. It operates at a nominal frequency of 28.63636 MHz with a load capacitance of 12pF and an equivalent series resistance of 30 Ohms. The component features a stability of ±30ppm across the operating temperature range of -40°C to +85°C. Housed in an HC-49/US package, it provides reliable performance for applications requiring stable clock signals.

Feature Summary

• Precision frequency stability within ±30ppm tolerance
• Standard HC-49/US through-hole packaging
• Designed for high reliability in commercial environments

Applications

• Microcontroller clock sources
• Communication interface timing
• Digital signal processing systems

Procurement Notes

Verify the exact suffix 'MAHE-B' against official QST documentation to confirm specific stability and temperature range specifications. Ensure compatibility with existing PCB footprints and soldering processes. Cross-reference with authorized distributors to validate authenticity and current production status before procurement.

Selection Notes

Select this component when a 28.63636 MHz reference is required with moderate stability needs. Consider the HC-49/US form factor for ease of manual assembly or rework. Evaluate thermal requirements to ensure the -40°C to +85°C range meets application constraints.

Part Context

This part belongs to the QT49 series of MHz crystals from QST, widely used in general-purpose electronics. It serves as a fundamental timing element in various digital systems. The series offers standardized packages and frequencies to simplify design integration across multiple product lines.

Replacement Considerations

Direct substitutes may include other manufacturers' HC-49/US crystals with identical 28.63636 MHz frequency, 12pF load capacitance, and ±30ppm stability. Verify pin compatibility and electrical parameters before substitution.