18QHTF21-49.158-PD

Overview

The Mercury Electronics 18QHTF21-49.158-PD is a quartz crystal resonator designed for high-frequency applications. It operates at a fundamental frequency of 49.158 MHz with a specified load capacitance of 30 pF. The device utilizes a through-hole mounting configuration housed in a HC-49/U package, ensuring mechanical stability and reliable electrical performance in standard circuit layouts.

Feature Summary

• Fundamental mode operation for precise frequency control
• Through-hole compatible HC-49/U package design
• Standard 30 pF load capacitance specification

Applications

• Clock generation circuits
• Microprocessor timing references
• Communication equipment oscillators

Procurement Notes

Verify the specific tolerance and temperature stability requirements against the official datasheet before procurement. Confirm that the HC-49/U package dimensions align with the target PCB footprint. Ensure the operating temperature range meets the environmental specifications of the final application to guarantee long-term reliability.

Selection Notes

Select this component when a fundamental frequency crystal is required for stable clock signals. The HC-49/U package offers robust mechanical handling compared to surface-mount alternatives. Consider the load capacitance match with the oscillator circuit to ensure accurate frequency output without additional trimming.

Part Context

This part belongs to the Mercury Electronics quartz crystal family, specifically tailored for general-purpose timing applications. The 18QHTF21 series typically provides consistent performance across various industrial and commercial electronic devices requiring precise frequency references.

Replacement Considerations

Direct substitutes must match the 49.158 MHz frequency, 30 pF load capacitance, and HC-49/U package. Verify equivalent tolerance and stability ratings from other manufacturers to ensure functional compatibility.