18QHTF21-74.1578-PD

Overview

The 18QHTF21-74.1578-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 74.1578 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down mode capability. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby (power down) functionality for energy management
• Standard XO design with quartz-based frequency stability

Applications

• Digital signal processing systems
• Communication equipment timing references
• Embedded control circuits

Procurement Notes

Verify the specific ordering suffix and package variant against the manufacturer's latest datasheet to ensure compatibility with the target PCB footprint. Confirm that the 1.8V supply requirement aligns with the system power rails before integration. Check for any RoHS compliance documentation if required by project specifications.

Selection Notes

Select this component when a 74.1578 MHz clock source with LVCMOS outputs is required. Ensure the design supports the 1.8V operating voltage and accommodates the 4-SMD no-lead form factor. Consider the standby feature if power efficiency during idle states is a critical design parameter.

Part Context

This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequencies and voltages within a standardized small outline package. It serves as a fundamental timing element in electronic assemblies requiring stable clock generation.

Replacement Considerations

Cross-reference with other Mercury Electronics models in the QHTF series sharing the same frequency and voltage. Verify pinout and electrical characteristics match exactly before substituting with components from other manufacturers.