18QHTF21-66.405819-OE

Overview

The 18QHTF21-66.405819-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 66.405819 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes an enable/disable control feature. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Features enable and disable control functionality for power management
• Utilizes a leadless SMD package for automated surface-mount assembly

Applications

• Digital signal processing systems requiring precise clock synchronization
• Communication equipment utilizing standard LVCMOS interfaces
• Embedded systems with low-voltage power constraints

Procurement Notes

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

Selection Notes

Select this component when a fixed frequency of 66.405819 MHz is required with LVCMOS outputs. Consider the 1.8V operating voltage and enable pin availability as key selection criteria. Evaluate the physical size constraints of the 4-SMD package against available board space. Compare performance against other Mercury oscillators if different frequencies or voltages are needed.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-voltage crystal oscillators. The series typically offers various standard frequencies and supports LVCMOS outputs. The 'OE' suffix indicates the inclusion of an enable/disable function, distinguishing it from basic continuous-output variants within the same product family.

Replacement Considerations

Direct replacements must match the 66.405819 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify that substitute components support the enable/disable control feature. Check for equivalent thermal and electrical specifications to ensure system compatibility without redesign.