18QHTF21-75.550-OE

Overview

The 18QHTF21-75.550-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 75.55 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes an enable/disable control function. 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 control functionality
• Compact 4-SMD no-lead surface mount package

Applications

• General clock signal generation
• Digital system timing references
• Embedded controller clock inputs

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your specific circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Cross-reference the enable pin configuration with your microcontroller or FPGA GPIO capabilities to ensure proper control integration during assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside standard LVCMOS signaling. The enable feature allows for power management strategies where the oscillator can be deactivated during idle states. Consider the small form factor suitable for space-constrained designs. Verify that the 75.55 MHz frequency meets the specific clocking needs of the target application without requiring additional frequency multiplication or division stages.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The manufacturer specializes in quartz crystals and oscillators, offering various packages and frequencies. This specific model represents a single-ended output variant within their portfolio, distinct from differential oscillator families like H_K or H_EK.

Replacement Considerations

Direct substitutes must match the 75.55 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Check for equivalent enable/disable pin configurations. Generic replacements may lack the specific control features or electrical characteristics.