18QHTF21-66.6667-PD

Overview

The 18QHTF21-66.6667-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 66.6667 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby function for power-down control. It is housed in a compact 4-SMD, no-lead package designed for surface-mount assembly.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Features a standby mode to enable power-down operation
• Utilizes a 4-SMD no-lead surface-mount package

Applications

• General-purpose timing clock generation
• Embedded system synchronization
• Digital signal processing circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet to prevent assembly errors.

Selection Notes

Select this component when a precise 66.6667 MHz reference is required with low-voltage operation. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the standby feature if power management during idle states is a critical design constraint for the application.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The model number indicates a 66.6667 MHz frequency variant within the 18QHTF21 family. These oscillators are designed for applications requiring stable quartz-based timing signals in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other 66.6667 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Verify pinout compatibility and electrical specifications such as supply voltage and output swing before substitution.