18QHTF21-72.1955-OE

Overview

The 18QHTF21-72.1955-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 72.1955 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable/disable pin for power control
• Compact 4-SMD no-lead surface mount package

Applications

• General purpose clock signal generation
• Digital system timing reference
• Embedded controller clock sources

Procurement Notes

Verify the specific ordering suffix and frequency tolerance against the manufacturer's official datasheet before procurement. Ensure the supply voltage matches the 1.8V requirement and confirm the package dimensions align with the PCB footprint design to avoid assembly issues.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside an enable/disable feature. The LVCMOS output is suitable for standard digital logic families. Consider the 4-SMD package size for space-constrained designs requiring surface-mount technology.

Part Context

This part belongs to the Mercury Electronics XO (Standard) series. It is distinct from differential oscillators or other SMD crystal variants within the manufacturer's portfolio. The model number indicates specific electrical parameters including the 72.1955 MHz frequency and 1.8V supply.

Replacement Considerations

Direct substitutes must match the 72.1955 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify enable/disable functionality compatibility. Cross-reference with Mercury Electronics' official replacement list for equivalent performance.