18QHTF21-28.330-PD

Oscillators Overview

The 18QHTF21-28.330-PD is a quartz crystal resonator manufactured by Mercury Electronics Ind. Co. Ltd, designed for high-frequency applications requiring precise timing stability. This component operates at a fundamental frequency of 28.330 MHz and utilizes a hermetically sealed metal can package to ensure long-term reliability and protection against environmental factors. The device features a parallel resonant mode configuration with a specified load capacitance typically ranging between 10 pF and 30 pF, depending on specific customer requirements or standard configurations. It exhibits low phase noise characteristics suitable for communication systems and clock generation circuits.

Oscillators Feature Summary

• Hermetically sealed metal can construction for enhanced environmental durability
• High Q-factor performance ensuring stable oscillation frequencies
• Low aging rate contributing to long-term frequency accuracy

Oscillators Applications

• Communication equipment local oscillators
• Precision clock generation circuits
• Test and measurement instrument timing references

Oscillators Procurement Notes

Verify the exact load capacitance and equivalent series resistance (ESR) values required by your circuit design before ordering, as these parameters are critical for oscillator stability. Confirm that the operating temperature range specified in the datasheet aligns with your application's environmental conditions. Ensure compatibility with your PCB layout regarding pin dimensions and mounting style. Request detailed electrical specifications from the manufacturer or authorized distributor to validate performance under your specific load conditions.

Oscillators Selection Notes

Select this component when high-frequency stability and robust physical packaging are prioritized over miniaturization. Consider the thermal characteristics and power handling capabilities relative to your oscillator circuit's drive level. Evaluate the available tolerance options against your system's frequency accuracy requirements. Compare alternative packages if space constraints exist, though this model offers superior protection compared to surface-mount variants.

Oscillators Part Context

This part belongs to Mercury Electronics' line of high-performance quartz crystals, often utilized in industrial and commercial electronics where reliability is paramount. The 'PD' suffix may indicate specific packaging or testing standards defined by the manufacturer. These components are commonly found in legacy or specialized hardware designs requiring proven quartz technology rather than newer MEMS alternatives.

Oscillators Replacement Considerations

Direct replacements must match the 28.330 MHz frequency and similar electrical parameters such as ESR and load capacitance. Verify that substitute parts offer comparable aging rates and temperature stability coefficients. Check mechanical footprint compatibility if direct pin-to-pin replacement is intended.