18QHTF21-12.000-OE

Overview

The 18QHTF21-12.000-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 12 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage range that includes 1.8V operation and features an active-low enable/disable control pin for power management. It is housed in a compact 4-SMD, no-lead package with dimensions suitable for surface-mount assembly.

Feature Summary

• Integrates LVCMOS output interface for direct digital logic compatibility
• Includes hardware enable/disable control functionality
• Utilizes a leadless surface-mount package design

Applications

• Embedded system clock generation
• Digital signal processing timing references
• Microcontroller peripheral synchronization

Procurement Notes

Verify the specific operating voltage requirements against the target circuit design before procurement. Confirm that the enable pin logic polarity matches the controlling microcontroller outputs. Ensure the PCB footprint aligns with the 4-SMD no-lead package specifications provided in the official datasheet to prevent soldering defects during assembly.

Selection Notes

Select this component when a precise 12 MHz reference is required for low-voltage digital circuits. Consider the enable feature if power conservation is critical. Evaluate the package size constraints against available board space. Compare performance metrics such as phase noise and stability against application requirements to ensure signal integrity.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor frequency control solutions. The series typically offers various frequencies and voltage options within a standardized package family, allowing designers to maintain consistent layout practices across different product variants while adjusting electrical parameters.

Replacement Considerations

Direct substitutes must match the 12 MHz frequency, LVCMOS output type, and 4-SMD no-lead package. Verify equivalent enable pin functionality and voltage compatibility. Cross-reference pin assignments to ensure electrical connectivity without modification.