QT49S-11.2896MBBK-T

Overview

The QST QT49S-11.2896MBBK-T is a surface-mount quartz crystal resonator operating at a fundamental frequency of 11.2896 MHz. It features a frequency tolerance and stability of ±50 ppm at 25°C, with an external load capacitance of 20 pF and an equivalent series resistance (ESR) of 40 Ohms maximum. The component utilizes the HC-49/US package style, measuring 12.7 mm in length, 4.8 mm in width, and 3.8 mm in height. It supports a standard operating temperature range of -20°C to +70°C.

Feature Summary

• Resistance-welded metal can construction for enhanced environmental durability
• Surface mount design compatible with automated assembly processes
• Fundamental mode operation ensuring precise timing signals

Applications

• Microcontroller clock sources
• Communication module timing circuits
• Digital signal processing systems

Procurement Notes

Verify that the specific suffix BBK corresponds to the required ±50 ppm stability and 20pF load capacitance specifications. Confirm RoHS compliance status and moisture sensitivity level requirements against project standards before procurement. Ensure the supplier provides valid traceability documentation for this discontinued or legacy part number variant.

Selection Notes

Select this component when a 11.2896 MHz fundamental frequency is strictly required for digital logic synchronization. The HC-49/US form factor allows for direct replacement in existing surface-mount footprints designed for this package size. Consider the ±50 ppm tolerance sufficient for general-purpose applications where higher precision is not mandated by the system architecture.

Part Context

This part belongs to the QT49S series of SMD crystals from QST Corporation. The series offers various frequencies and tolerances within the HC-49/US footprint. The MBBK suffix indicates specific performance parameters including the 50 ppm tolerance and 20pF load capacitance configuration distinct from other variants in the lineup.

Replacement Considerations

Public confirmed substitute: QT49S-11.2896MEEJ-T. Verify pin compatibility and parameter equivalence before substitution.