18QHTF21-72.99166-OE

Overview

The 18QHTF21-72.99166-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 72.99166 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption and operational states. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes enable/disable functionality for power management
• Operates at a nominal 1.8V supply voltage

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded system timing references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package dimensions fit within your PCB layout constraints. Cross-reference the manufacturer datasheet for detailed electrical characteristics and reliability data to ensure compliance with your application standards.

Selection Notes

Select this component when a precise 72.99166 MHz reference is required for LVCMOS-compatible circuits. The 1.8V operating voltage makes it suitable for modern low-power digital designs. Consider the enable/disable feature if power efficiency during idle states is critical. Evaluate the small form factor against available board space. Ensure the manufacturing source is authorized to guarantee part authenticity and traceability.

Part Context

This oscillator belongs to the QHTF series from Mercury Electronic, which specializes in quartz-based frequency control products. The company has decades of experience in Taiwan's crystal industry. This specific model represents a standard XO solution, distinct from temperature-compensated or voltage-controlled variants. It serves as a fundamental timing element in electronic assemblies requiring stable clock signals.

Replacement Considerations

Direct substitutes must match the 72.99166 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical parameters before substitution.