18QHTF21-67.800-OE

Overview

The 18QHTF21-67.800-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 67.8 MHz and utilizes LVCMOS output logic. 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. The component is housed in a compact 4-SMD, no-lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• LVCMOS output logic compatibility
• Integrated enable and disable control functionality
• Compact 4-SMD no-lead surface mount package

Applications

• General-purpose clock signal generation
• Digital system timing references
• Embedded controller clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Ensure that the 1.8V supply voltage aligns with your system's power rails. Confirm that the enable/disable pin configuration matches your control logic levels. Check the datasheet for absolute maximum ratings to prevent damage during operation.

Selection Notes

Select this component when a precise 67.8 MHz clock source is required for LVCMOS-compatible digital circuits. Consider the 1.8V operating voltage as a primary constraint for power supply design. The enable/disable feature makes it suitable for systems requiring power management or clock gating capabilities. Evaluate the 4-SMD package size against available board space constraints.

Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency oscillators for various electronic applications. The manufacturer specializes in quartz crystals and timing components, offering a range of frequencies and packages. This specific model represents a standard frequency option within their portfolio, targeting cost-sensitive and space-constrained designs.

Replacement Considerations

Direct replacements must match the 67.8 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as current consumption and stability. Cross-reference with other manufacturers' equivalent parts if supply chain issues arise.