18QHTF21-74.000-PD

Overview

The 18QHTF21-74.000-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 74 MHz and utilizes LVCMOS output logic levels. The device requires a supply voltage of 1.8V and features a standby function for power-down control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is designed for applications requiring precise timing signals within low-power electronic systems.

Feature Summary

• Integrates LVCMOS output logic for direct digital interface compatibility
• Includes standby functionality to enable power-down mode
• Utilizes a leadless SMD package for surface-mount assembly

Applications

• General purpose timing clock generation
• Digital signal processing circuits
• Communication equipment synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design specifications before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit's power rails. Ensure the 4-SMD no-lead footprint matches the PCB land pattern exactly to prevent soldering defects during assembly.

Selection Notes

Select this model when a 74 MHz clock source with LVCMOS outputs is required in a minimal footprint. Consider the 1.8V operating voltage constraint relative to other available supply options. Evaluate the standby feature necessity if power management is critical for the end application compared to continuous operation alternatives.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies including 51.2 MHz, 96.768 MHz, and 24.000 MHz. All variants share similar physical dimensions and electrical characteristics, differing primarily in their output frequency and specific ordering suffixes.

Replacement Considerations

Direct substitutes include other 18QHTF21 series parts such as 18QHTF21-51.200-PD or 18QHTF21-24.000-PD if frequency flexibility exists. Verify pinout compatibility and voltage levels when considering cross-brand replacements.