18QHTF21-66.6589-OE

Overview

The 18QHTF21-66.6589-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 66.6589 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 suitable for surface-mount applications.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Features integrated enable and disable functionality for power management
• Designed as a standard XO with quartz-based frequency stability

Applications

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

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD package footprint matches your PCB layout constraints. Cross-reference the OE suffix with official documentation to confirm any specific ordering or testing variations defined by the manufacturer.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside LVCMOS outputs. Consider the 4-SMD form factor for space-constrained designs. Evaluate the need for enable/disable controls if power efficiency during idle states is critical. Compare against other Mercury series oscillators if different frequencies or package sizes are needed.

Part Context

This part belongs to the Mercury Electronics standard XO series, which focuses on quartz-based oscillators. The company has extensive experience in Taiwan's quartz industry since 1973. This model represents a specific frequency variant within their broader portfolio of SMD oscillators and crystals.

Replacement Considerations

Check for direct substitutes within the same Mercury series offering identical 66.6589 MHz frequency and 1.8V LVCMOS characteristics. Verify pinout compatibility for the 4-SMD package. Consult distributor databases for equivalent parts from other manufacturers ensuring matching electrical parameters.