18QHTF21-66.666-OE

Overview

The 18QHTF21-66.666-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 66.666 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component serves as a precise clock source for digital circuits requiring low power consumption and small form factors.

Feature Summary

• Integrates LVCMOS output logic for direct interfacing with digital systems
• Includes hardware enable/disable functionality for power management
• Utilizes a leadless surface-mount package for space-constrained designs

Applications

• Clock generation for embedded processors
• Timing reference for communication interfaces
• Power management circuit synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail is stable within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to prevent assembly issues. Cross-reference the part number suffix with manufacturer documentation to confirm availability and exact specifications.

Selection Notes

Select this oscillator when a 66.666 MHz clock signal is required with minimal board space. Consider the 1.8V operating voltage to ensure compatibility with low-power logic families. Evaluate the need for an enable pin to manage system power states effectively. Compare performance metrics such as phase noise and stability against application requirements to ensure signal integrity.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-voltage, small-footprint oscillators. The series is characterized by its use of LVCMOS outputs and support for various frequencies. The 'OE' suffix typically denotes specific packaging or testing configurations defined by the manufacturer. These components are part of a broader range of frequency control products offered by the company.

Replacement Considerations

Direct substitutes must match the 66.666 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify electrical parameters such as current consumption and startup time. Check mechanical compatibility with existing footprints. Consult manufacturer cross-reference lists for validated alternatives.