18QHTF21-21.855-PD

Oscillators Overview

The 18QHTF21-21.855-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 21.855 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Supports Low Voltage CMOS (LVCMOS) output logic levels
• Includes Standby or Power Down functionality for energy management
• Utilizes a small form factor 4-SMD No Lead surface mount package

Oscillators Applications

• General clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Power-sensitive portable electronic devices requiring low voltage operation

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 power rails. Ensure the PCB footprint matches the 2.0x1.6mm 4-SMD No Lead package specifications to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a precise 21.855 MHz timing source is required within space-constrained designs. The choice is driven by the need for low voltage operation at 1.8V and the integration of power-down capabilities. Consider the LVCMOS interface compatibility with downstream logic circuits and the suitability of the small SMD package for high-density board layouts.

Oscillators Part Context

This part belongs to the QuikXO series from Mercury Electronics, characterized by fast delivery options. The model number indicates a standard XO type with specific frequency and voltage attributes. It is distinct from other variants in the series by its unique 21.855 MHz frequency setting and 1.8V operating specification.

Oscillators Replacement Considerations

Direct substitutes include other 21.855 MHz LVCMOS oscillators in 4-SMD No Lead packages with 1.8V supply and standby functions. Verify pinout compatibility and electrical parameters such as phase noise and jitter before swapping.