18QHTF21-122.200-PD

Overview

The 18QHTF21-122.200-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 122.2 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications.

Feature Summary

• Supports low-voltage operation with integrated standby capability
• Provides stable LVCMOS signal output for digital circuits
• Designed for surface-mount integration via leadless SMD package

Applications

• Digital clock generation for high-speed data buses
• Timing reference for communication interface modules
• System clock source for embedded processing units

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's operational specifications. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions to guarantee proper soldering and electrical connection during assembly.

Selection Notes

Select this component when a precise 122.2 MHz timing source is required for LVCMOS-compatible logic families. Consider the 1.8V operating voltage constraint relative to the system power architecture. Evaluate the need for power-down functionality if energy efficiency during idle states is a critical design parameter for the application environment.

Part Context

This part belongs to the Mercury Electronics XO series, which specializes in frequency control products. The manufacturer has established expertise in crystal industry solutions since 1973. The 18QHTF21 series typically offers standardized oscillators designed for reliable performance in various electronic systems requiring accurate clock signals.

Replacement Considerations

Direct substitutes include other 122.2 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Verify pinout compatibility and voltage levels when cross-referencing alternative sources. Ensure thermal and mechanical constraints remain consistent with the original design specifications.