18QHTF21-66.666-PD

Overview

The 18QHTF21-66.666-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a nominal frequency of 66.666 MHz. It utilizes LVCMOS output logic and requires a 1.8V supply voltage. The device features a Standby (Power Down) function for power management. Frequency stability is specified at ±50ppm. The operational temperature range extends from -40°C to +85°C. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports Standby (Power Down) mode for energy efficiency
• Delivers LVCMOS output signal compatibility
• Operates within an extended industrial temperature range

Applications

• General purpose clock generation in electronic circuits
• Embedded systems requiring precise timing references
• Consumer electronics utilizing low-voltage logic interfaces

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail is stable and within the specified limits to maintain frequency accuracy. Confirm that the PCB footprint matches the 4-SMD No Lead package dimensions provided in the official datasheet to ensure proper soldering and mechanical fit during assembly processes.

Selection Notes

Select this component when a 66.666 MHz reference is required with LVCMOS outputs. Consider the ±50ppm stability specification for timing sensitivity. Evaluate the -40°C to +85°C range against environmental conditions. Compare the 1.8V supply requirement with available system voltages. Assess the physical size constraints relative to the 2.0x1.6mm package dimensions for board layout optimization.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequencies with consistent electrical characteristics. The 'PD' suffix indicates the inclusion of a power-down control feature. These components are designed for applications demanding reliable timing signals in space-constrained designs.

Replacement Considerations

Direct substitutes include other 66.666 MHz LVCMOS oscillators with identical 1.8V supply and 4-SMD No Lead packaging. Verify pinout compatibility and thermal specifications before substitution. Cross-reference with Mercury Electronics' current product listings for updated availability.