18QHTF21-75.4975-OE

Overview

The 18QHTF21-75.4975-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 75.4975 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes enable/disable control capabilities. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports enable and disable functionality for power management
• Utilizes LVCMOS output logic for digital interface compatibility
• Features a leadless SMD package for automated assembly

Applications

• General clock signal generation in electronic circuits
• Timing reference sources for digital systems
• Embedded devices requiring stable frequency inputs

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 mounting issues during assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside standard LVCMOS signaling. The enable/disable feature makes it suitable for battery-powered or power-sensitive designs. Consider the operating temperature range and humidity sensitivity specifications to ensure reliability in the intended environmental conditions.

Part Context

This part belongs to the QHTF series of oscillators from Mercury Electronics. The manufacturer specializes in quartz crystals and frequency control products, including TCXOs and VCXOs. The series typically offers various frequencies and packages to meet diverse timing needs in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other 75.4975 MHz LVCMOS oscillators with identical 1.8V supply and 4-SMD no-lead footprints. Verify pinout compatibility and electrical parameters such as phase noise and jitter before swapping manufacturers.