18QHTF21-11.650-OE

Overview

The 18QHTF21-11.650-OE is a high-stability crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, designed for precision timing applications requiring low phase noise and tight frequency tolerance. Operating at a fundamental frequency of 11.650 MHz, this component utilizes an HC-49/US package configuration to ensure mechanical robustness and reliable performance in demanding environments. The device features a load capacitance specification compatible with standard microcontroller interfaces, supporting stable oscillation across industrial temperature ranges while maintaining consistent output amplitude.

Feature Summary

• High-frequency stability with minimal drift over temperature variations
• Robust HC-49/US package design for enhanced mechanical durability
• Optimized for low phase noise performance in sensitive circuits

Applications

• Microcontroller clock sources
• Communication equipment timing references
• Industrial control system oscillators

Procurement Notes

Verify the specific load capacitance requirements against your circuit design before procurement. Ensure that the operating temperature range aligns with your environmental conditions. Confirm pin compatibility and mounting specifications to prevent integration issues during assembly.

Selection Notes

Select this model when precise frequency accuracy at 11.650 MHz is critical. Consider the HC-49/US form factor if space constraints allow for through-hole mounting. Evaluate thermal stability needs to ensure long-term reliability in your specific application environment.

Part Context

This component belongs to Mercury Electronics' series of fundamental mode crystals, emphasizing stability and longevity. It serves as a core timing element in electronic systems where frequency precision directly impacts operational integrity and signal synchronization.

Replacement Considerations

Direct substitutes must match the 11.650 MHz frequency, HC-49/US package, and equivalent load capacitance. Verify manufacturer-specific tolerances and temperature coefficients to ensure functional equivalence without circuit redesign.