18QHTF21-49.178555-PD

Overview

The 18QHTF21-49.178555-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 49.178555 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down capability for energy management. It is housed in a compact 4-SMD, No Lead package.

Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates standby and power-down functionality
• Provides LVCMOS signal output

Applications

• Digital communication systems requiring precise clocking
• Data transmission equipment
• Network interface modules

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 no-lead package dimensions fit within your PCB layout constraints. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when a stable 49.178555 MHz reference is required for digital interfaces. The LVCMOS output is suitable for direct interfacing with standard logic families. Consider the power-down feature if battery life or thermal management is a priority in the application environment.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The manufacturer has decades of experience in Taiwan's crystal industry. This series typically offers standard oscillators designed for general-purpose electronic applications requiring reliable timing signals.

Replacement Considerations

Cross-reference with other 49.178555 MHz LVCMOS oscillators in the same 4-SMD package. Verify pinout compatibility and electrical specifications such as supply voltage and output swing before substituting.