18QHTF21-73.66979-PD

Overview

The 18QHTF21-73.66979-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 73.66979 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm. The component is designed for applications requiring precise clock signals within a small form factor.

Feature Summary

• Supports standby mode for power reduction
• Compact surface-mount package design
• LVCMOS output interface compatibility

Applications

• General purpose clock generation
• Embedded systems timing
• Consumer electronics 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 no-lead package footprint matches your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a specific frequency near 73.67 MHz. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the physical size constraints of the 2.0x1.6mm package when designing dense PCB layouts. Evaluate the need for a standby feature if power efficiency during idle states is a critical design parameter.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on small-form-factor oscillators. The series typically offers various frequencies and voltage options within a consistent 4-SMD package. Mercury Electronics has a long history in quartz crystal manufacturing, providing these components as part of their broader portfolio of frequency control products for industrial and consumer markets.

Replacement Considerations

Direct substitutes may include other 1.8V LVCMOS oscillators in a 2.0x1.6mm SMD package with similar frequency stability. Verify pinout compatibility and electrical characteristics such as phase noise and jitter before swapping. Cross-reference with manufacturer-specific replacement guides for the 18QHTF21 series to ensure functional equivalence.