18QHTF21-77.673-PD

Overview

The 18QHTF21-77.673-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 77.673 MHz with an LVCMOS output logic level. 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.

Feature Summary

• LVCMOS output interface for standard digital logic compatibility
• Integrated standby mode to reduce power consumption during idle periods
• Compact 4-SMD no-lead package design for space-constrained PCB layouts

Applications

• General clock signal generation for digital circuits
• Timing reference for communication interfaces
• Embedded systems requiring low-power operation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD package dimensions fit within your board's mechanical constraints. Check for any specific RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when a stable 77.673 MHz clock source is needed with low power consumption capabilities. The LVCMOS output ensures compatibility with standard logic families. Consider the 1.8V operating voltage when designing power delivery networks. The small form factor makes it ideal for dense electronic assemblies where space is limited.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within a standardized 4-SMD footprint. The series provides options for different supply voltages and output types, allowing designers to choose based on specific system requirements while maintaining consistent physical dimensions across the product line.

Replacement Considerations

Direct substitutes must match the 77.673 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter specifications to ensure seamless integration without circuit redesign.