18QHTF21-21.477-PD

Oscillators Overview

The 18QHTF21-21.477-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 21.477 MHz and utilizes an LVCMOS output signal format. 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 with dimensions of 2.0x1.6 mm.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Features LVCMOS output interface
• Includes standby and power-down functionality

Oscillators Applications

• Digital signal processing circuits
• Communication equipment timing
• Embedded system clock generation

Oscillators 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 4-SMD no-lead package footprint matches your PCB layout constraints to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a precise 21.477 MHz clock source is required for LVCMOS-compatible logic families. Consider the 1.8V operating voltage as a primary constraint for compatibility with modern low-power digital ICs. Evaluate the need for power-down features if energy efficiency is critical for the target application environment.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The manufacturer has decades of experience in Taiwan producing crystals and oscillators. This series typically offers standard XO formats designed for general-purpose timing applications in consumer and industrial electronics.

Oscillators Replacement Considerations

Direct substitutes include other 21.477 MHz LVCMOS oscillators in 2.0x1.6mm packages from compatible manufacturers. Verify pinout compatibility and electrical specifications such as current consumption and startup time before substitution.