18QHTF21-55.5555-OE

Overview

The 18QHTF21-55.5555-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 55.5555 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes enable/disable control capabilities. It is housed in a compact 4-SMD, No Lead package designed for surface mount applications.

Feature Summary

• LVCMOS output logic interface
• Integrated enable and disable functionality
• Compact 4-SMD no lead surface mount package

Applications

• General purpose clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD package dimensions fit within the available PCB real estate constraints.

Selection Notes

Select this component when a precise 55.5555 MHz clock source is required for low-voltage digital circuits. The integrated enable feature allows for power management strategies. Consider the small form factor for space-constrained designs requiring reliable quartz-based timing stability.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency oscillators. The manufacturer has decades of experience in quartz crystal production. This specific model represents a surface-mount solution for modern electronic assemblies requiring stable clock signals.

Replacement Considerations

Direct substitutes must match the 55.5555 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical specifications before swapping. Consult the manufacturer's cross-reference list for approved alternatives.