18QHTF21-49.5867-PD

Overview

The 18QHTF21-49.5867-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.5867 MHz and utilizes LVCMOS output logic. 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 with dimensions of 2.0mm x 1.6mm. This component is designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby and power-down functionality
• Compact 4-SMD no-lead surface mount package

Applications

• General purpose timing clock generation
• Digital signal processing systems
• Communication equipment requiring stable reference frequencies

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the PCB footprint matches the 4-SMD, No Lead package dimensions to prevent assembly issues. Check for any specific RoHS compliance documentation if required by regulatory standards.

Selection Notes

Select this component when a 49.5867 MHz reference is required with low power consumption capabilities. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the small form factor for space-constrained designs. Evaluate the need for the standby feature against the application's power management strategy.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard crystal oscillators. The manufacturer specializes in frequency control products including quartz crystals and filters. The 'PD' suffix typically indicates the inclusion of a power-down pin or function, distinguishing it from non-power-managed variants within the same frequency family.

Replacement Considerations

Direct replacements must match the 49.5867 MHz frequency, LVCMOS output type, 1.8V supply, and 4-SMD package. Verify pinout compatibility for the power-down function. Cross-reference with other manufacturers offering identical electrical specifications and mechanical dimensions to ensure interchangeability.