QT49S-24.000MAHJ-T

Overview

The QT49S-24.000MAHJ-T is a surface-mount quartz crystal resonator manufactured by QST, operating at a nominal frequency of 24 MHz. It features a frequency stability of ±30 ppm and an equivalent series resistance (ESR) of 30 Ohms. The component utilizes a load capacitance of 18 pF and is housed in a compact SMD package with dimensions of 12.7 x 4.8 x 3.8 mm. This device is designed for precise timing applications requiring stable oscillation within standard circuit configurations.

Feature Summary

• Surface-mount design for automated assembly
• Quartz crystal construction for high stability
• Standardized package dimensions for PCB integration

Applications

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

Procurement Notes

Verify the specific suffix MAHJ-T to confirm surface-mount packaging and 18pF load capacitance, as other variants may differ. Ensure compatibility with the target oscillator circuit's load capacitance requirements. Confirm that the ±30 ppm stability meets the system's timing accuracy specifications before finalizing procurement decisions.

Selection Notes

Select this component when a 24 MHz surface-mount crystal is required with moderate stability. Compare against through-hole alternatives if space constraints allow. Consider the ESR value for oscillator loop gain margin. Verify that the 18pF load capacitance matches the host circuit design to ensure accurate frequency output without external trimming.

Part Context

This part belongs to the QT49S series from QST, which includes various frequencies and mounting options. The MAHJ-T suffix specifically denotes the surface-mount variant with defined physical dimensions. Other parts in the series may offer different frequencies or leaded packages, necessitating careful model verification for direct replacement or design substitution.

Replacement Considerations

Direct substitutes must match the 24 MHz frequency, 18pF load capacitance, and SMD footprint. Check manufacturer datasheets for pin-compatible alternatives with identical electrical parameters. Generic crystals may not fit mechanically or electrically without circuit adjustment.