18QHTF21-66.08856-PD

Overview

The 18QHTF21-66.08856-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 66.08856 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, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation with 1.8V supply
• Includes standby mode for power management
• Provides LVCMOS output signal compatibility

Applications

• Digital clock generation systems
• Data communication interfaces
• Embedded processor timing sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before ordering. 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 guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Choose this component when a precise 66.08856 MHz reference is required for LVCMOS-compatible digital circuits. The 1.8V operating voltage makes it suitable for modern low-power embedded systems. Consider the standby feature if power efficiency is critical. Verify that the 4-SMD package size fits within the available board space constraints of the final product design.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies with consistent LVCMOS outputs and 1.8V operation. The -PD suffix typically indicates the inclusion of a power-down control pin, allowing for active standby modes to reduce current consumption when the oscillator is not actively driving the load.

Replacement Considerations

Direct replacements must match the 66.08856 MHz frequency, LVCMOS output type, 1.8V supply voltage, and 4-SMD no lead package. Verify pinout compatibility, particularly the power-down control pin configuration. Check if alternative manufacturers offer equivalent performance metrics for temperature stability and phase noise.