18QHTF21-49.4133-PD

Overview

The 18QHTF21-49.4133-PD is a standard frequency crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.4133 MHz and utilizes LVCMOS output logic levels. The device is housed in a compact 4-SMD, no-lead package suitable for surface-mount applications. It supports a supply voltage range typically associated with the 1.8V standby capability mentioned in official listings. The component is designed for general timing applications requiring precise clock signals.

Feature Summary

• Provides stable LVCMOS output signals for digital circuit synchronization
• Features low power consumption with dedicated standby mode functionality
• Utilizes a leadless surface-mount package for automated assembly compatibility

Applications

• General-purpose clock generation in embedded systems
• Timing reference for microprocessors and memory interfaces
• Data communication equipment requiring precise frequency standards

Procurement Notes

Verify the specific operating voltage and load requirements against your system design before procurement. Confirm that the 4-SMD no-lead package dimensions align with your PCB footprint. Ensure that the LVCMOS output swing matches your receiving logic input thresholds. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure joint integrity during assembly processes.

Selection Notes

Select this component when a fixed frequency of 49.4133 MHz is required with LVCMOS outputs. Consider the 1.8V standby feature if power management is critical. Evaluate the 4-SMD no-lead form factor against available board space constraints. Compare performance against other Mercury oscillators if different frequencies or packages are needed.

Part Context

This part belongs to the Mercury Electronics family of quartz crystal oscillators. These components are widely used in Taiwan-based manufacturing supply chains for timing solutions. The series includes various frequencies and packages, catering to diverse electronic product needs from consumer electronics to industrial control systems.

Replacement Considerations

Direct substitutes may include other 49.4133 MHz LVCMOS oscillators in 4-SMD packages from manufacturers like Epson, NDK, or TXC. Verify pinout compatibility and electrical specifications before substitution. Mercury part numbers within the same series but different frequencies are not direct replacements.