18QHTF21-66.6666-OE

Overview

The 18QHTF21-66.6666-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 66.6666 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, supporting a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application 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 specified in the official datasheet to guarantee proper solder joint formation and mechanical stability during operation.

Selection Notes

Select this component when a precise 66.6666 MHz clock source is required with low voltage operation. Consider the LVCMOS output swing compatibility with downstream logic inputs. Evaluate the thermal performance and operating temperature range to ensure reliability under expected environmental conditions. Compare size constraints against alternative packages if space is limited.

Part Context

This part belongs to the 18QHTF21 series of surface mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The 'OE' suffix typically denotes specific packaging or tape-and-reel configuration details as defined by the manufacturer. This model represents a standard fixed-frequency option within the product line.

Replacement Considerations

Direct replacements must match the 66.6666 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as jitter and phase noise. Consult the manufacturer's cross-reference list for approved alternatives.