18QHTF21-12.9024-PD

Overview

The 18QHTF21-12.9024-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.9024 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output interface for digital circuit compatibility
• Integrated standby mode for power reduction
• Surface-mount 4-pin no-lead package design

Applications

• General purpose clock generation
• Digital signal processing systems
• Communication equipment timing

Procurement Notes

Verify the specific ordering suffix PD against the manufacturer's current datasheet to ensure correct packaging and tape-and-reel specifications. Confirm that the 1.8V supply requirement aligns with your system's power rails before procurement. Check for any recent revisions to the mechanical dimensions of the 4-SMD package to ensure board layout compatibility.

Selection Notes

Select this component when a 12.9024 MHz reference is required with low-voltage operation. Ensure the load capacitance requirements of the host circuit match the oscillator's specifications. Consider the thermal characteristics of the small form factor if high-density mounting is involved. Verify that the LVCMOS swing is sufficient for the receiving logic gates.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The brand has extensive experience in quartz crystal manufacturing. This specific model represents a fixed-frequency option within their portfolio, distinct from tunable or temperature-compensated variants.

Replacement Considerations

Direct substitutes must match the 12.9024 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Cross-reference with other manufacturers' 4-pin oscillators ensuring identical pinout and electrical parameters. Verify that any alternative part meets the same standby current specifications.