18QHTF21-67.728-OE

Overview

The 18QHTF21-67.728-OE is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 67.728 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes an enable/disable control feature for power management. 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 functionality for power control
• Compact 4-SMD no-lead surface mount package

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 circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Check for any specific environmental operating temperature ranges required by your application to ensure reliability under all conditions.

Selection Notes

Select this component when a 67.728 MHz reference is needed with low-voltage operation. Consider the LVCMOS output level for direct interfacing with compatible logic families. Evaluate the small form factor for space-constrained designs. Verify that the enable pin requirement fits your power sequencing strategy compared to always-on alternatives.

Part Context

This part belongs to the Mercury Electronics 18QHTF series of surface-mount oscillators. The series offers various frequencies within the same package outline. The 'OE' suffix typically denotes specific packaging or tape-and-reel configuration details provided by the manufacturer. These components are part of Mercury's broader portfolio of quartz-based frequency control products established since 1973.

Replacement Considerations

Direct replacements must match the 67.728 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Verify equivalent enable/disable functionality. Consult manufacturer cross-reference lists for verified substitutes. Generic oscillators may differ in phase noise or startup time.