18QHTF21-75.4375-PD

Overview

The 18QHTF21-75.4375-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 75.4375 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby function for power down control. It is housed in a compact 4-SMD, no lead package designed for surface mount applications.

Feature Summary

• Standard XO configuration with LVCMOS output
• Integrated standby capability for power management
• Compact 4-SMD no lead surface mount package

Applications

• General clock signal generation
• Digital circuit timing references
• Embedded system synchronization

Procurement Notes

Verify the specific ordering suffix to confirm the exact electrical characteristics and package variant. Ensure the required frequency tolerance and load capacitance match the target circuit design. Confirm that the 1.8V supply voltage aligns with the system power rails before finalizing the procurement order.

Selection Notes

Select this component when a precise 75.4375 MHz reference is required for LVCMOS compatible digital interfaces. Consider the 4-SMD footprint for space-constrained PCB layouts. Evaluate the standby feature if power efficiency during idle states is a critical design requirement for the application.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of standard crystal oscillators. The series offers various frequencies and output types within a small form factor. The PD suffix typically indicates specific packaging or testing configurations defined by the manufacturer.

Replacement Considerations

Direct substitutes must match the 75.4375 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD package dimensions. Verify pinout compatibility and thermal characteristics before swapping with other manufacturers' equivalents.