18QHTF21-74.1578-OE

Overview

The 18QHTF21-74.1578-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 74.1578 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable/disable control functionality
• Compact 4-SMD no-lead surface mount package

Applications

• General clock signal generation in electronic circuits
• Timing reference for digital systems
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your power management architecture. Ensure the enable/disable pin configuration matches your control logic to guarantee proper operation during standby or active states.

Selection Notes

Select this component when a stable 74.1578 MHz clock source is required with low-voltage operation. Consider the LVCMOS output swing limits and drive capability relative to the connected load. Evaluate the thermal performance and operating temperature range to ensure reliability under intended environmental conditions.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The 18QHTF21 model line typically offers various frequencies within a small form factor. It serves as a fundamental timing element in modern electronics, replacing discrete crystal resonators with integrated oscillator circuits.

Replacement Considerations

Direct substitutes include other 74.1578 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Verify pinout compatibility and electrical specifications such as supply voltage and output current before substitution.