18QHTF21-19.687-PD

Oscillators Overview

The 18QHTF21-19.687-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 19.687 MHz with an LVCMOS output type. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• LVCMOS output interface
• 1.8V supply voltage operation
• Standby (Power Down) capability

Oscillators Applications

• General purpose clock generation
• Digital signal processing systems
• Communication equipment timing

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V logic level compatibility matches your receiving circuitry. Ensure the 4-SMD no-lead package footprint aligns with your PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside standard LVCMOS signaling. The integrated power-down feature makes it suitable for battery-powered or energy-efficient designs. Consider the 4-SMD form factor for space-constrained boards where traditional through-hole oscillators are unsuitable.

Oscillators Part Context

This part belongs to the Mercury 18QHTF series of XO oscillators. The series typically offers various frequencies and voltage options. The 'PD' suffix likely indicates the power-down feature. Mercury Electronics specializes in quartz crystals and frequency control products, providing reliable timing solutions for industrial and consumer electronics markets.

Oscillators Replacement Considerations

Direct replacements must match the 19.687 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility if substituting with other manufacturers' parts. Ensure equivalent electrical characteristics such as phase noise and jitter specs are met for critical timing applications.