18QHTF21-4.000-OE

Oscillators Overview

The 18QHTF21-4.000-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 4.0 MHz and utilizes an LVCMOS output interface. The device requires a 1.8V supply voltage and includes enable/disable functionality for power management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

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

Oscillators Applications

• General purpose clock generation in embedded systems
• Timing reference for microcontrollers and processors
• Digital signal processing circuits

Oscillators 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's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions specified in the official mechanical drawing to guarantee proper soldering and electrical connection.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside standard LVCMOS signaling levels. The enable/disable feature makes it suitable for battery-powered or power-sensitive designs. Consider the 4.0 MHz frequency point for specific baud rate or clock division needs. Verify that the package size fits within the available board space constraints compared to larger oscillator packages.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor oscillators. The series typically offers various frequencies and voltage options. The 'OE' suffix often denotes specific packaging or enable features. Mercury Electronics is a established supplier of quartz-based timing components, providing solutions for consumer electronics and industrial applications.

Oscillators Replacement Considerations

Direct substitutes may include other 4.0 MHz LVCMOS oscillators in 4-SMD packages operating at 1.8V. Verify pinout compatibility and electrical specifications such as phase noise and jitter if critical. Cross-reference with similar series from Mercury or other manufacturers offering equivalent form factors and voltage levels.