18QHTF21-78.6432-PD

Overview

The 18QHTF21-78.6432-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 78.6432 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption efficiently. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation with a 1.8V supply requirement
• Includes standby mode functionality for power management
• Delivers LVCMOS output signal compatibility

Applications

• General-purpose digital clock generation
• Embedded system timing references
• Consumer electronics signal synchronization

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 any specific RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when a stable 78.6432 MHz reference is needed for LVCMOS-compatible circuits. Consider the 1.8V operating voltage as a primary constraint for power supply design. Evaluate the need for power-down capabilities to optimize system efficiency during idle states. Compare physical footprint requirements against available board space.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz frequency control products. The series typically includes various frequencies and packages, catering to diverse electronic timing needs. Mercury Electronics has a long history in manufacturing quartz crystals and oscillators, providing reliable components for industrial and consumer markets.

Replacement Considerations

Direct substitutes may include other 78.6432 MHz LVCMOS oscillators in similar SMD packages from different manufacturers. Verify pinout compatibility and electrical specifications such as current consumption and startup time. Ensure the replacement supports the same 1.8V supply voltage and standby functionality.