18QHTF21-65.576-OE

Overview

The Mercury Electronics 18QHTF21-65.576-OE is a crystal oscillator operating at a fundamental frequency of 65.576 MHz. It utilizes a HC-49/U package configuration, designed for standard through-hole mounting on printed circuit boards. The component provides stable clock signals for digital circuits and microcontroller applications requiring precise timing references.

Feature Summary

• Fundamental mode crystal operation for stable frequency generation
• Standard HC-49/U through-hole package for easy integration
• Designed for general-purpose digital timing applications

Applications

• Microcontroller clock sources
• Digital communication interfaces
• General-purpose timing circuits

Procurement Notes

Verify the exact load capacitance requirements against your circuit design before procurement. Confirm that the HC-49/U package dimensions align with your PCB footprint. Ensure the operating temperature range meets your specific environmental conditions. Cross-reference the suffix OE with official documentation to confirm any specific testing or screening standards applied to this variant.

Selection Notes

Select this component when a fundamental mode crystal in an HC-49/U package is required for 65.576 MHz applications. Consider the load capacitance specifications to ensure proper oscillation stability. Evaluate the available drive level limits to prevent over-driving the crystal element. Verify compatibility with the host circuit's input impedance characteristics.

Part Context

This part belongs to the Mercury Electronics line of discrete crystal oscillators. The 18QHTF21 series typically denotes specific packaging and electrical characteristics within their catalog. The model number indicates a fixed frequency output suitable for synchronous digital systems. It represents a standard passive component used for timing reference in electronic assemblies.

Replacement Considerations

Direct substitutes must match the 65.576 MHz frequency, HC-49/U package, and fundamental mode operation. Verify equivalent load capacitance and drive level specifications from alternative manufacturers. Check for pinout compatibility and mechanical tolerance alignment. Ensure the replacement part meets the same quality and reliability standards.