18QHTF21-85.540-OE

Overview

The 18QHTF21-85.540-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 85.54 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The component features an enable/disable control pin for power management flexibility. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals in electronic circuits.

Feature Summary

• Provides stable clock signal generation at 85.54 MHz using LVCMOS interface
• Supports low-voltage operation at 1.8V with integrated enable/disable functionality
• Designed for surface-mount assembly via a leadless four-terminal SMD package

Applications

• Digital signal processing systems requiring precise clock synchronization
• Communication equipment utilizing standard CMOS-compatible timing sources
• Embedded systems needing low-power oscillators with control capabilities

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions specified in the official datasheet to avoid mounting issues.

Selection Notes

Select this model when a standard LVCMOS oscillator is required for 85.54 MHz applications. Consider the 1.8V operating voltage and enable/disable feature for power-sensitive designs. Evaluate the small form factor against available board space constraints compared to larger packages or alternative frequencies within the same series.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various standard XO options. The series typically includes different frequencies and packaging styles. Mercury Electronics specializes in quartz crystals and oscillators, providing components for timing-critical applications across industrial and consumer electronics sectors.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical package and electrical characteristics but different frequencies, such as 18QHTF21-85.450-OE, if frequency adjustment is permissible. Cross-reference with similar LVCMOS 4-SMD oscillators from other manufacturers only if pin compatibility and voltage levels match exactly.