18QHTF21-49.4233-PD

Overview

The 18QHTF21-49.4233-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.4233 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down function via standby mode. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes power-down capability for energy management
• Provides LVCMOS signal output

Applications

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

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 package footprint matches your PCB layout constraints to avoid assembly issues.

Selection Notes

Select this component when a stable 49.4233 MHz clock source is required in space-constrained designs. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the power-down feature if system energy efficiency is a priority during idle periods.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based timing solutions. The manufacturer has produced frequency control products since 1973, establishing expertise in crystal oscillators and filters. This series represents their standard XO offerings in small surface-mount packages.

Replacement Considerations

Direct substitutes include other 49.4233 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.