18QHTF21-66.6589-PD

Overview

The 18QHTF21-66.6589-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 66.6589 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm. This component is engineered for applications requiring precise clock signals within a small form factor.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby and power-down functionality for power management
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• General purpose clock signal generation
• Digital circuit timing references
• Embedded systems requiring low-voltage operation

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this model when a 66.6589 MHz frequency is strictly required for system synchronization. Consider the 1.8V supply constraint and LVCMOS output levels to ensure compatibility with downstream logic gates. Evaluate the need for power-down capabilities if energy efficiency is a priority in the final application environment.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount oscillators. The series typically offers various frequencies and voltage options within a standardized small outline package. Mercury Electronics specializes in quartz crystals and frequency control products, providing solutions for diverse electronic timing needs across multiple industries.

Replacement Considerations

Direct substitutes must match the 66.6589 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter specifications from alternative manufacturers to ensure functional equivalence.