18QHTF21-20.540-OE

Oscillators Overview

The 18QHTF21-20.540-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 20.54 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, functioning at a supply voltage of 1.8V. It features an integrated enable and disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount assembly.

Oscillators Feature Summary

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

Oscillators Applications

• Digital communication systems requiring precise clock signals
• Embedded systems utilizing low-voltage microcontrollers
• Portable electronic devices necessitating small form factor oscillators

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 provided in the official datasheet to guarantee proper soldering and mechanical stability during operation.

Oscillators Selection Notes

Select this component when a stable 20.54 MHz reference is required for LVCMOS-compatible digital circuits. The choice is driven by the need for a low-profile 2.0x1.6 mm package and the necessity of an enable pin for power management. Consider the 1.8V operating voltage constraint and ensure the application environment supports the standard XO performance characteristics defined by the manufacturer.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The series includes various frequencies such as 8.300 MHz and 65.300 MHz within the same package type. Mercury Electronics is a pioneer in Taiwan's quartz crystal industry, providing standardized oscillators for diverse electronic applications requiring reliable timing solutions.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series variants like the 18QHTF21-8.300-OE or 18QHTF21-65.300-OE if frequency adjustments are permissible. Cross-brand replacements must match the 20.54 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package constraints to ensure functional equivalence.