18QHTF21-12.420-OE

Overview

The 18QHTF21-12.420-OE is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 12.42 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features an Enable/Disable control pin for power management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Integrates enable/disable functionality for efficient power management
• Delivers standard LVCMOS output signals for digital interfacing
• Utilizes a leadless SMD package for compact board integration

Applications

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

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet to prevent assembly issues.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside standard LVCMOS compatibility. The enable feature makes it suitable for battery-powered or power-sensitive designs. Consider the physical size constraints of the 4-SMD package during layout planning to ensure adequate spacing for thermal and manufacturing processes.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies while maintaining consistent electrical characteristics and package styles. It serves as a timing source for digital logic circuits, providing stability and accuracy within its specified operating temperature range.

Replacement Considerations

Direct substitutes must match the 12.42 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and enable logic polarity. Cross-reference with other Mercury 18QHTF21 variants or equivalent industry parts ensuring identical form factor and electrical specs.