18QHTF21-20.945-PD

Oscillators Overview

The 18QHTF21-20.945-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 20.945 MHz and utilizes an LVCMOS output interface. The device functions with a supply voltage of 1.8V and includes a standby or power-down capability for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby mode for power reduction
• Provides LVCMOS logic output levels

Oscillators Applications

• Digital signal processing systems
• Communication equipment timing
• Embedded control circuits

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints to guarantee proper assembly and electrical connectivity.

Oscillators Selection Notes

Select this component when a stable 20.945 MHz reference is required for LVCMOS-compatible digital interfaces. Consider the 1.8V operating voltage and standby feature if power efficiency is critical. Evaluate the physical dimensions of the 4-SMD package against available board space to ensure compatibility with existing manufacturing processes.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, which specializes in quartz frequency control products. The series offers various standard frequencies with consistent LVCMOS outputs and low-voltage operation. Mercury Electronics has a long history in Taiwan as a pioneer in quartz crystal manufacturing, providing reliable timing solutions for electronic industries.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series variants such as 18QHTF21-51.200-PD or 18QHTF21-96.768-PD if different frequencies are acceptable. Cross-referencing with other manufacturers requires matching the LVCMOS output type, 1.8V supply, and 4-SMD package dimensions to ensure functional equivalence.