18QHTF21-66.6666-PD

Overview

The 18QHTF21-66.6666-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 66.6666 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, no lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• Supports LVCMOS output logic for digital signal interfacing
• Includes standby mode functionality for power management
• Utilizes a 4-SMD no-lead surface mount package

Applications

• General clock generation in electronic systems
• Digital circuit timing reference applications
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit 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 provided 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 signal is required with low-power standby capabilities. Consider the LVCMOS output compatibility with downstream logic families. Evaluate the thermal performance and operating temperature range specifications to ensure reliability within the intended environmental conditions of the final application.

Part Context

This oscillator belongs to the Mercury Electronics SMD oscillator series, which focuses on compact frequency control solutions. The brand has a history of manufacturing quartz crystals and oscillators since 1973. This specific model represents a standard XO variant designed for general-purpose timing applications requiring stable frequency generation in small form factors.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Verify pinout and electrical parameters carefully if considering alternative manufacturers. Ensure any replacement maintains the same LVCMOS logic level and 1.8V supply requirement to avoid circuit damage or malfunction.