QT49S-11.2896MAHJ-T

Overview

The QT49S-11.2896MAHJ-T is a surface-mount crystal oscillator manufactured by QST, operating at a nominal frequency of 11.2896 MHz. It utilizes an HC-49/US package with dimensions of 12.7 x 4.8 x 3.8 mm. The component features a load capacitance of 18 pF and a maximum series resistance of 40 Ohms. Frequency stability is rated at ±30 ppm within the -20°C to +70°C temperature range.

Feature Summary

• Surface-mount design for automated assembly
• HC-49/US form factor compatibility
• Stable frequency performance across industrial temperatures

Applications

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

Procurement Notes

Verify the manufacturer designation matches QST specifications rather than generic TXC listings. Confirm the suffix MAHJ-T corresponds to the correct tolerance and packaging configuration. Ensure the load capacitance requirement aligns with the target circuit design before procurement.

Selection Notes

Select this component when a 11.2896 MHz reference is required for SMD applications. The HC-49/US footprint allows for retrofitting into designs originally intended for through-hole crystals. Verify that the 18 pF load capacitance matches the oscillator circuit requirements.

Part Context

This part belongs to the QT49S series of surface-mount crystals. The series offers various frequency options in the same physical package. The specific model provides a standard frequency for data communication protocols requiring precise timing references.

Replacement Considerations

Direct substitutes include other manufacturers' HC-49/US SMD crystals with identical electrical parameters. Cross-reference part numbers such as those from Epson or NDK if availability is constrained. Ensure equivalent stability and load capacitance ratings.