18QHTF21-124.799-OE

Overview

The 18QHTF21-124.799-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 124.799 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes hardware enable/disable functionality for power management
• Utilizes a leadless SMD package for space-constrained designs

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded system timing references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application datasheet before procurement. Ensure the 1.8V supply rail stability meets the oscillator's noise sensitivity specifications. Confirm that the PCB footprint matches the 4-SMD No Lead package dimensions provided in the official mechanical drawing to avoid assembly issues.

Selection Notes

Select this component when a precise 124.799 MHz reference is required with low-power operation capabilities. Consider the LVCMOS output swing limits relative to the receiving input threshold. Evaluate the thermal performance within the -40°C to 85°C operating range if the environment experiences significant temperature fluctuations.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency generation solutions. The model number indicates the specific frequency variant within the 18QHTF21 family. These oscillators are designed to replace discrete crystal and amplifier circuits with a single integrated solution.

Replacement Considerations

Direct substitutes must match the 124.799 MHz frequency, LVCMOS output type, 1.8V supply voltage, and 4-SMD No Lead package. Verify pinout compatibility and electrical characteristics with alternative manufacturers' components to ensure functional equivalence.