18QHTF21-18.900-PD

Oscillators Overview

The 18QHTF21-18.900-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 18.9 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, functioning with a supply voltage of 1.8V. It features a power-down mode capability to reduce energy consumption when the unit is not in active use. The component is housed in a compact 4-SMD, no-lead package, suitable for surface-mount assembly processes in modern electronic designs.

Oscillators Feature Summary

• Supports LVCMOS output interface for digital logic compatibility
• Includes standby or power-down functionality for energy management
• Utilizes a small form-factor 4-SMD no-lead package

Oscillators Applications

• General-purpose clock signal generation in embedded systems
• Timing reference sources for microcontroller units
• Digital communication interface synchronization

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V operating voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Choose this component when a precise 18.9 MHz timing source is required for low-power digital circuits. The LVCMOS output ensures direct interfacing with standard logic families without additional level shifting. Consider the power-down feature if battery life or thermal management is a critical constraint in the final application environment.

Oscillators Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The manufacturer has decades of experience in Taiwan producing crystals and oscillators. This series represents their standard XO offerings, balancing performance with compact packaging solutions for various consumer and industrial electronics markets.

Oscillators Replacement Considerations

Compatible substitutes include other 18.9 MHz LVCMOS oscillators in 4-SMD packages from manufacturers such as Epson, NDK, or SiTime. Ensure replacement parts match the 1.8V supply requirement and pinout configuration. Verify that the replacement offers equivalent phase noise and stability specifications for the specific application.