18QHTF21-1.920-OE

Overview

The Mercury Electronics 18QHTF21-1.920-OE is a quartz crystal resonator designed for high-frequency applications. It operates at a fundamental frequency of 1.920 MHz. The component utilizes a hermetically sealed metal can package, specifically the HC-49/U style, ensuring environmental stability and long-term reliability. This series is engineered for use in oscillator circuits requiring precise timing references with low phase noise characteristics.

Feature Summary

• Hermetically sealed metal can construction for enhanced environmental protection
• Fundamental mode operation for stable frequency generation
• Optimized for low phase noise performance in oscillator designs

Applications

• Communication equipment local oscillators
• Test and measurement instrument timing references
• Industrial control system clock sources

Procurement Notes

Verify the specific load capacitance requirements against your circuit design before procurement. Confirm that the operating temperature range meets your application's environmental specifications. Ensure compatibility with your oscillator circuit's drive level limitations to prevent frequency pulling or damage. Request detailed electrical parameter sheets from authorized distributors for final validation.

Selection Notes

Select this component when a fundamental frequency crystal is required for 1.920 MHz applications. Consider the HC-49/U package size constraints within your PCB layout. Evaluate the need for hermetic sealing based on the operational environment's humidity and contamination levels. Compare equivalent series resistance values if power consumption is a critical design factor.

Part Context

This part belongs to Mercury Electronics' standard quartz crystal resonator lineup. These components are widely used in electronic systems requiring stable clock signals. The 18QHTF21 series represents a common offering for general-purpose timing applications where moderate stability and cost-effectiveness are prioritized over ultra-high precision specifications found in oven-controlled variants.

Replacement Considerations

Direct substitutes may include other manufacturers' HC-49/U crystals rated for 1.920 MHz. Verify that alternative parts match the load capacitance and ESR specifications. Check package dimensions for mechanical fit. Ensure the replacement maintains similar frequency tolerance and aging rates for circuit compatibility.