18QHTF21-20.540-PD

Oscillators Overview

The 18QHTF21-20.540-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 20.54 MHz. It utilizes an LVCMOS output interface and supports a supply voltage of 1.8V. The device features a power-down mode for standby operation. It is housed in a compact 4-SMD surface-mount package, designed for applications requiring stable clock signals at low voltage.

Oscillators Feature Summary

• Provides stable clock signals via LVCMOS output interface
• Operates at low voltage with 1.8V supply requirement
• Includes power-down functionality for standby management

Oscillators Applications

• Low-voltage digital circuit clocking
• Embedded systems requiring stable timing
• Portable electronic devices

Oscillators Procurement Notes

Verify the exact specifications from official manufacturer documentation before integration. Confirm that the 1.8V supply and LVCMOS output levels match your system requirements. Ensure the 4-SMD package dimensions are compatible with your PCB layout. Check for any specific handling or storage conditions required for quartz components.

Oscillators Selection Notes

Select this component when a 20.54 MHz frequency is required with LVCMOS compatibility. Consider the 1.8V operating voltage constraint for power budgeting. The power-down feature is suitable for battery-operated applications. Verify the 4-SMD footprint against available board space.

Oscillators Part Context

Mercury Electronics has been manufacturing frequency control products since 1973. This model belongs to their surface-mount oscillator series, which expanded from lead-type packages to SMD formats. The company is recognized as a pioneer in quartz crystal manufacturing in Taiwan.

Oscillators Replacement Considerations

The datasheet notes that the 18QHTF21-20.540-OE variant offers Enable/Disable control instead of Standby. Verify if the specific control logic matches your design needs before substituting.