18QHTF21-66.66666-OE

Overview

The 18QHTF21-66.66666-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 66.66666 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 requiring precise timing signals.

Feature Summary

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

Applications

• General clock signal generation in electronic circuits
• Timing reference for digital systems
• Embedded devices requiring stable frequency 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 no lead package dimensions fit the PCB footprint requirements. Cross-reference the manufacturer part number to avoid confusion with similar models in the series.

Selection Notes

Select this component when a precise 66.66666 MHz clock source is required with low voltage operation. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the enable pin feature if power conservation or clock gating is necessary for the application. Verify thermal performance within the specified operating temperature range.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies in a small form factor. The series typically provides standard XO solutions with LVCMOS outputs. The 'OE' suffix may indicate specific ordering or packaging variations defined by the manufacturer. Other variants in this series share the same package and voltage characteristics but differ in frequency.

Replacement Considerations

Direct substitutes must match the 66.66666 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no lead package. Check equivalent parts from other manufacturers for identical electrical specifications and pinout compatibility. Ensure thermal and environmental ratings meet or exceed the original requirements.