18QHTF21-74.250-PD

Overview

The 18QHTF21-74.250-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 74.25 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The component features a power-down capability via a standby mode. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode for power-down functionality
• Utilizes a 4-SMD no lead surface mount package

Applications

• Battery-powered portable devices
• General purpose timing clock generation
• Digital signal processing systems

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's power rails. Ensure the 4-SMD no lead footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required for timing applications. The LVCMOS output is suitable for standard digital logic families. Consider the power-down feature if energy efficiency is critical. Verify that the 74.25 MHz frequency meets the system clock requirements and that the small form factor fits within the available board space constraints.

Part Context

This part belongs to the Mercury Electronics SMD oscillator series, which provides quartz-based timing solutions. The manufacturer specializes in frequency control products including crystals and oscillators. This specific model represents a standard XO variant designed for general electronic applications requiring precise clock signals in a compact surface-mount format.

Replacement Considerations

Compatible substitutes include other 74.25 MHz LVCMOS oscillators from Mercury Electronics such as the 18QHTF21-74.074-PD or 18QHTF21-68.665-PD, provided the frequency difference is acceptable. Other manufacturers offering 1.8V 4-SMD oscillators may be considered if pinout and electrical characteristics match.